tburry / pquery

third party/jsminplus.php

<?php

/**
 * JSMinPlus version 1.4
 *
 * Minifies a javascript file using a javascript parser
 *
 * This implements a PHP port of Brendan Eich's Narcissus open source javascript engine (in javascript)
 * References: http://en.wikipedia.org/wiki/Narcissus_(JavaScript_engine)
 * Narcissus sourcecode: http://mxr.mozilla.org/mozilla/source/js/narcissus/
 * JSMinPlus weblog: http://crisp.tweakblogs.net/blog/cat/716
 *
 * Tino Zijdel <crisp@tweakers.net>
 *
 * Usage: $minified = JSMinPlus::minify($script [, $filename])
 *
 * Versionlog (see also changelog.txt):
 * 23-07-2011 - remove dynamic creation of OP_* and KEYWORD_* defines and declare them on top
 *              reduce memory footprint by minifying by block-scope
 *              some small byte-saving and performance improvements
 * 12-05-2009 - fixed hook:colon precedence, fixed empty body in loop and if-constructs
 * 18-04-2009 - fixed crashbug in PHP 5.2.9 and several other bugfixes
 * 12-04-2009 - some small bugfixes and performance improvements
 * 09-04-2009 - initial open sourced version 1.0
 *
 * Latest version of this script: http://files.tweakers.net/jsminplus/jsminplus.zip
 *
 */

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is the Narcissus JavaScript engine.
 *
 * The Initial Developer of the Original Code is
 * Brendan Eich <brendan@mozilla.org>.
 * Portions created by the Initial Developer are Copyright (C) 2004
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s): Tino Zijdel <crisp@tweakers.net>
 * PHP port, modifications and minifier routine are (C) 2009-2011
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

define('TOKEN_END', 1);
define('TOKEN_NUMBER', 2);
define('TOKEN_IDENTIFIER', 3);
define('TOKEN_STRING', 4);
define('TOKEN_REGEXP', 5);
define('TOKEN_NEWLINE', 6);
define('TOKEN_CONDCOMMENT_START', 7);
define('TOKEN_CONDCOMMENT_END', 8);

define('JS_SCRIPT', 100);
define('JS_BLOCK', 101);
define('JS_LABEL', 102);
define('JS_FOR_IN', 103);
define('JS_CALL', 104);
define('JS_NEW_WITH_ARGS', 105);
define('JS_INDEX', 106);
define('JS_ARRAY_INIT', 107);
define('JS_OBJECT_INIT', 108);
define('JS_PROPERTY_INIT', 109);
define('JS_GETTER', 110);
define('JS_SETTER', 111);
define('JS_GROUP', 112);
define('JS_LIST', 113);

define('JS_MINIFIED', 999);

define('DECLARED_FORM', 0);
define('EXPRESSED_FORM', 1);
define('STATEMENT_FORM', 2);

/* Operators */
define('OP_SEMICOLON', ';');
define('OP_COMMA', ',');
define('OP_HOOK', '?');
define('OP_COLON', ':');
define('OP_OR', '||');
define('OP_AND', '&&');
define('OP_BITWISE_OR', '|');
define('OP_BITWISE_XOR', '^');
define('OP_BITWISE_AND', '&');
define('OP_STRICT_EQ', '===');
define('OP_EQ', '==');
define('OP_ASSIGN', '=');
define('OP_STRICT_NE', '!==');
define('OP_NE', '!=');
define('OP_LSH', '<<');
define('OP_LE', '<=');
define('OP_LT', '<');
define('OP_URSH', '>>>');
define('OP_RSH', '>>');
define('OP_GE', '>=');
define('OP_GT', '>');
define('OP_INCREMENT', '++');
define('OP_DECREMENT', '--');
define('OP_PLUS', '+');
define('OP_MINUS', '-');
define('OP_MUL', '*');
define('OP_DIV', '/');
define('OP_MOD', '%');
define('OP_NOT', '!');
define('OP_BITWISE_NOT', '~');
define('OP_DOT', '.');
define('OP_LEFT_BRACKET', '[');
define('OP_RIGHT_BRACKET', ']');
define('OP_LEFT_CURLY', '{');
define('OP_RIGHT_CURLY', '}');
define('OP_LEFT_PAREN', '(');
define('OP_RIGHT_PAREN', ')');
define('OP_CONDCOMMENT_END', '@*/');

define('OP_UNARY_PLUS', 'U+');
define('OP_UNARY_MINUS', 'U-');

/* Keywords */
define('KEYWORD_BREAK', 'break');
define('KEYWORD_CASE', 'case');
define('KEYWORD_CATCH', 'catch');
define('KEYWORD_CONST', 'const');
define('KEYWORD_CONTINUE', 'continue');
define('KEYWORD_DEBUGGER', 'debugger');
define('KEYWORD_DEFAULT', 'default');
define('KEYWORD_DELETE', 'delete');
define('KEYWORD_DO', 'do');
define('KEYWORD_ELSE', 'else');
define('KEYWORD_ENUM', 'enum');
define('KEYWORD_FALSE', 'false');
define('KEYWORD_FINALLY', 'finally');
define('KEYWORD_FOR', 'for');
define('KEYWORD_FUNCTION', 'function');
define('KEYWORD_IF', 'if');
define('KEYWORD_IN', 'in');
define('KEYWORD_INSTANCEOF', 'instanceof');
define('KEYWORD_NEW', 'new');
define('KEYWORD_NULL', 'null');
define('KEYWORD_RETURN', 'return');
define('KEYWORD_SWITCH', 'switch');
define('KEYWORD_THIS', 'this');
define('KEYWORD_THROW', 'throw');
define('KEYWORD_TRUE', 'true');
define('KEYWORD_TRY', 'try');
define('KEYWORD_TYPEOF', 'typeof');
define('KEYWORD_VAR', 'var');
define('KEYWORD_VOID', 'void');
define('KEYWORD_WHILE', 'while');
define('KEYWORD_WITH', 'with');


class JSMinPlus

PSR1 recommends that each class must be in a namespace of at least one level to avoid collisions.

{
	private $parser;
	private $reserved = array(
		'break', 'case', 'catch', 'continue', 'default', 'delete', 'do',
		'else', 'finally', 'for', 'function', 'if', 'in', 'instanceof',
		'new', 'return', 'switch', 'this', 'throw', 'try', 'typeof', 'var',
		'void', 'while', 'with',
		// Words reserved for future use
		'abstract', 'boolean', 'byte', 'char', 'class', 'const', 'debugger',
		'double', 'enum', 'export', 'extends', 'final', 'float', 'goto',
		'implements', 'import', 'int', 'interface', 'long', 'native',
		'package', 'private', 'protected', 'public', 'short', 'static',
		'super', 'synchronized', 'throws', 'transient', 'volatile',
		// These are not reserved, but should be taken into account
		// in isValidIdentifier (See jslint source code)
		'arguments', 'eval', 'true', 'false', 'Infinity', 'NaN', 'null', 'undefined'
	);

	private function __construct()
	{
		$this->parser = new JSParser($this);
	}

	public static function minify($js, $filename='')
	{
		static $instance;

		// this is a singleton
		if(!$instance)
			$instance = new JSMinPlus();

		return $instance->min($js, $filename);
	}

	private function min($js, $filename)
	{
		try
		{
			$n = $this->parser->parse($js, $filename, 1);
			return $this->parseTree($n);
		}
		catch(Exception $e)
		{
			echo $e->getMessage() . "\n";
		}

		return false;
	}

	public function parseTree($n, $noBlockGrouping = false)
	{
		$s = '';

		switch ($n->type)
		{
			case JS_MINIFIED:
				$s = $n->value;
			break;

			case JS_SCRIPT:
				// we do nothing yet with funDecls or varDecls
				$noBlockGrouping = true;
			// FALL THROUGH

			case JS_BLOCK:
				$childs = $n->treeNodes;
				$lastType = 0;
				for ($c = 0, $i = 0, $j = count($childs); $i < $j; $i++)
				{
					$type = $childs[$i]->type;
					$t = $this->parseTree($childs[$i]);
					if (strlen($t))
					{
						if ($c)
						{
							$s = rtrim($s, ';');

							if ($type == KEYWORD_FUNCTION && $childs[$i]->functionForm == DECLARED_FORM)
							{
								// put declared functions on a new line
								$s .= "\n";
							}
							elseif ($type == KEYWORD_VAR && $type == $lastType)
							{
								// mutiple var-statements can go into one
								$t = ',' . substr($t, 4);
							}
							else
							{
								// add terminator
								$s .= ';';
							}
						}

						$s .= $t;

						$c++;
						$lastType = $type;
					}
				}

				if ($c > 1 && !$noBlockGrouping)
				{
					$s = '{' . $s . '}';
				}
			break;

			case KEYWORD_FUNCTION:
				$s .= 'function' . ($n->name ? ' ' . $n->name : '') . '(';
				$params = $n->params;
				for ($i = 0, $j = count($params); $i < $j; $i++)
					$s .= ($i ? ',' : '') . $params[$i];
				$s .= '){' . $this->parseTree($n->body, true) . '}';
			break;

			case KEYWORD_IF:
				$s = 'if(' . $this->parseTree($n->condition) . ')';
				$thenPart = $this->parseTree($n->thenPart);
				$elsePart = $n->elsePart ? $this->parseTree($n->elsePart) : null;

				// empty if-statement
				if ($thenPart == '')
					$thenPart = ';';

				if ($elsePart)
				{
					// be carefull and always make a block out of the thenPart; could be more optimized but is a lot of trouble
					if ($thenPart != ';' && $thenPart[0] != '{')
						$thenPart = '{' . $thenPart . '}';

					$s .= $thenPart . 'else';

					// we could check for more, but that hardly ever applies so go for performance
					if ($elsePart[0] != '{')
						$s .= ' ';

					$s .= $elsePart;
				}
				else
				{
					$s .= $thenPart;
				}
			break;

			case KEYWORD_SWITCH:
				$s = 'switch(' . $this->parseTree($n->discriminant) . '){';
				$cases = $n->cases;
				for ($i = 0, $j = count($cases); $i < $j; $i++)
				{
					$case = $cases[$i];
					if ($case->type == KEYWORD_CASE)
						$s .= 'case' . ($case->caseLabel->type != TOKEN_STRING ? ' ' : '') . $this->parseTree($case->caseLabel) . ':';
					else
						$s .= 'default:';

					$statement = $this->parseTree($case->statements, true);
					if ($statement)
					{
						$s .= $statement;
						// no terminator for last statement
						if ($i + 1 < $j)
							$s .= ';';
					}
				}
				$s .= '}';
			break;

			case KEYWORD_FOR:
				$s = 'for(' . ($n->setup ? $this->parseTree($n->setup) : '')
					. ';' . ($n->condition ? $this->parseTree($n->condition) : '')
					. ';' . ($n->update ? $this->parseTree($n->update) : '') . ')';

				$body  = $this->parseTree($n->body);
				if ($body == '')
					$body = ';';

				$s .= $body;
			break;

			case KEYWORD_WHILE:
				$s = 'while(' . $this->parseTree($n->condition) . ')';

				$body  = $this->parseTree($n->body);
				if ($body == '')
					$body = ';';

				$s .= $body;
			break;

			case JS_FOR_IN:
				$s = 'for(' . ($n->varDecl ? $this->parseTree($n->varDecl) : $this->parseTree($n->iterator)) . ' in ' . $this->parseTree($n->object) . ')';

				$body  = $this->parseTree($n->body);
				if ($body == '')
					$body = ';';

				$s .= $body;
			break;

			case KEYWORD_DO:
				$s = 'do{' . $this->parseTree($n->body, true) . '}while(' . $this->parseTree($n->condition) . ')';
			break;

			case KEYWORD_BREAK:
			case KEYWORD_CONTINUE:
				$s = $n->value . ($n->label ? ' ' . $n->label : '');
			break;

			case KEYWORD_TRY:
				$s = 'try{' . $this->parseTree($n->tryBlock, true) . '}';
				$catchClauses = $n->catchClauses;
				for ($i = 0, $j = count($catchClauses); $i < $j; $i++)
				{
					$t = $catchClauses[$i];
					$s .= 'catch(' . $t->varName . ($t->guard ? ' if ' . $this->parseTree($t->guard) : '') . '){' . $this->parseTree($t->block, true) . '}';
				}
				if ($n->finallyBlock)
					$s .= 'finally{' . $this->parseTree($n->finallyBlock, true) . '}';
			break;

			case KEYWORD_THROW:
			case KEYWORD_RETURN:
				$s = $n->type;
				if ($n->value)
				{
					$t = $this->parseTree($n->value);
					if (strlen($t))
					{
						if ($this->isWordChar($t[0]) || $t[0] == '\\')
							$s .= ' ';

						$s .= $t;
					}
				}
			break;

			case KEYWORD_WITH:
				$s = 'with(' . $this->parseTree($n->object) . ')' . $this->parseTree($n->body);
			break;

			case KEYWORD_VAR:
			case KEYWORD_CONST:
				$s = $n->value . ' ';
				$childs = $n->treeNodes;
				for ($i = 0, $j = count($childs); $i < $j; $i++)
				{
					$t = $childs[$i];
					$s .= ($i ? ',' : '') . $t->name;
					$u = $t->initializer;
					if ($u)
						$s .= '=' . $this->parseTree($u);
				}
			break;

			case KEYWORD_IN:
			case KEYWORD_INSTANCEOF:
				$left = $this->parseTree($n->treeNodes[0]);
				$right = $this->parseTree($n->treeNodes[1]);

				$s = $left;

				if ($this->isWordChar(substr($left, -1)))
					$s .= ' ';

				$s .= $n->type;

				if ($this->isWordChar($right[0]) || $right[0] == '\\')
					$s .= ' ';

				$s .= $right;
			break;

			case KEYWORD_DELETE:
			case KEYWORD_TYPEOF:
				$right = $this->parseTree($n->treeNodes[0]);

				$s = $n->type;

				if ($this->isWordChar($right[0]) || $right[0] == '\\')
					$s .= ' ';

				$s .= $right;
			break;

			case KEYWORD_VOID:
				$s = 'void(' . $this->parseTree($n->treeNodes[0]) . ')';
			break;

			case KEYWORD_DEBUGGER:
				throw new Exception('NOT IMPLEMENTED: DEBUGGER');
			break;

break; does not seem to be reachable.

			case TOKEN_CONDCOMMENT_START:
			case TOKEN_CONDCOMMENT_END:
				$s = $n->value . ($n->type == TOKEN_CONDCOMMENT_START ? ' ' : '');
				$childs = $n->treeNodes;
				for ($i = 0, $j = count($childs); $i < $j; $i++)
					$s .= $this->parseTree($childs[$i]);
			break;

			case OP_SEMICOLON:
				if ($expression = $n->expression)
					$s = $this->parseTree($expression);
			break;

			case JS_LABEL:
				$s = $n->label . ':' . $this->parseTree($n->statement);
			break;

			case OP_COMMA:
				$childs = $n->treeNodes;
				for ($i = 0, $j = count($childs); $i < $j; $i++)
					$s .= ($i ? ',' : '') . $this->parseTree($childs[$i]);
			break;

			case OP_ASSIGN:
				$s = $this->parseTree($n->treeNodes[0]) . $n->value . $this->parseTree($n->treeNodes[1]);
			break;

			case OP_HOOK:
				$s = $this->parseTree($n->treeNodes[0]) . '?' . $this->parseTree($n->treeNodes[1]) . ':' . $this->parseTree($n->treeNodes[2]);
			break;

			case OP_OR: case OP_AND:

The case body in a switch statement must start on the line following the statement.

			case OP_BITWISE_OR: case OP_BITWISE_XOR: case OP_BITWISE_AND:

The case body in a switch statement must start on the line following the statement.

			case OP_EQ: case OP_NE: case OP_STRICT_EQ: case OP_STRICT_NE:

The case body in a switch statement must start on the line following the statement.

			case OP_LT: case OP_LE: case OP_GE: case OP_GT:

The case body in a switch statement must start on the line following the statement.

			case OP_LSH: case OP_RSH: case OP_URSH:

The case body in a switch statement must start on the line following the statement.

			case OP_MUL: case OP_DIV: case OP_MOD:

The case body in a switch statement must start on the line following the statement.

				$s = $this->parseTree($n->treeNodes[0]) . $n->type . $this->parseTree($n->treeNodes[1]);
			break;

			case OP_PLUS:
			case OP_MINUS:
				$left = $this->parseTree($n->treeNodes[0]);
				$right = $this->parseTree($n->treeNodes[1]);

				switch ($n->treeNodes[1]->type)
				{
					case OP_PLUS:
					case OP_MINUS:
					case OP_INCREMENT:
					case OP_DECREMENT:
					case OP_UNARY_PLUS:
					case OP_UNARY_MINUS:
						$s = $left . $n->type . ' ' . $right;
					break;

					case TOKEN_STRING:
						//combine concatted strings with same quotestyle
						if ($n->type == OP_PLUS && substr($left, -1) == $right[0])
						{
							$s = substr($left, 0, -1) . substr($right, 1);
							break;
						}
					// FALL THROUGH

					default:
						$s = $left . $n->type . $right;
				}
			break;

			case OP_NOT:
			case OP_BITWISE_NOT:
			case OP_UNARY_PLUS:
			case OP_UNARY_MINUS:
				$s = $n->value . $this->parseTree($n->treeNodes[0]);
			break;

			case OP_INCREMENT:
			case OP_DECREMENT:
				if ($n->postfix)
					$s = $this->parseTree($n->treeNodes[0]) . $n->value;
				else
					$s = $n->value . $this->parseTree($n->treeNodes[0]);
			break;

			case OP_DOT:
				$s = $this->parseTree($n->treeNodes[0]) . '.' . $this->parseTree($n->treeNodes[1]);
			break;

			case JS_INDEX:
				$s = $this->parseTree($n->treeNodes[0]);
				// See if we can replace named index with a dot saving 3 bytes
				if (	$n->treeNodes[0]->type == TOKEN_IDENTIFIER &&
					$n->treeNodes[1]->type == TOKEN_STRING &&
					$this->isValidIdentifier(substr($n->treeNodes[1]->value, 1, -1))
				)
					$s .= '.' . substr($n->treeNodes[1]->value, 1, -1);
				else
					$s .= '[' . $this->parseTree($n->treeNodes[1]) . ']';
			break;

			case JS_LIST:
				$childs = $n->treeNodes;
				for ($i = 0, $j = count($childs); $i < $j; $i++)
					$s .= ($i ? ',' : '') . $this->parseTree($childs[$i]);
			break;

			case JS_CALL:
				$s = $this->parseTree($n->treeNodes[0]) . '(' . $this->parseTree($n->treeNodes[1]) . ')';
			break;

			case KEYWORD_NEW:
			case JS_NEW_WITH_ARGS:
				$s = 'new ' . $this->parseTree($n->treeNodes[0]) . '(' . ($n->type == JS_NEW_WITH_ARGS ? $this->parseTree($n->treeNodes[1]) : '') . ')';
			break;

			case JS_ARRAY_INIT:
				$s = '[';
				$childs = $n->treeNodes;
				for ($i = 0, $j = count($childs); $i < $j; $i++)
				{
					$s .= ($i ? ',' : '') . $this->parseTree($childs[$i]);
				}
				$s .= ']';
			break;

			case JS_OBJECT_INIT:
				$s = '{';
				$childs = $n->treeNodes;
				for ($i = 0, $j = count($childs); $i < $j; $i++)

Loop incrementor ($i) jumbling with inner loop

				{
					$t = $childs[$i];
					if ($i)
						$s .= ',';
					if ($t->type == JS_PROPERTY_INIT)
					{
						// Ditch the quotes when the index is a valid identifier
						if (	$t->treeNodes[0]->type == TOKEN_STRING &&
							$this->isValidIdentifier(substr($t->treeNodes[0]->value, 1, -1))
						)
							$s .= substr($t->treeNodes[0]->value, 1, -1);
						else
							$s .= $t->treeNodes[0]->value;

						$s .= ':' . $this->parseTree($t->treeNodes[1]);
					}
					else
					{
						$s .= $t->type == JS_GETTER ? 'get' : 'set';
						$s .= ' ' . $t->name . '(';
						$params = $t->params;
						for ($i = 0, $j = count($params); $i < $j; $i++)
							$s .= ($i ? ',' : '') . $params[$i];
						$s .= '){' . $this->parseTree($t->body, true) . '}';
					}
				}
				$s .= '}';
			break;

			case TOKEN_NUMBER:
				$s = $n->value;
				if (preg_match('/^([1-9]+)(0{3,})$/', $s, $m))
					$s = $m[1] . 'e' . strlen($m[2]);
			break;

			case KEYWORD_NULL: case KEYWORD_THIS: case KEYWORD_TRUE: case KEYWORD_FALSE:

The case body in a switch statement must start on the line following the statement.

			case TOKEN_IDENTIFIER: case TOKEN_STRING: case TOKEN_REGEXP:

The case body in a switch statement must start on the line following the statement.

				$s = $n->value;
			break;

			case JS_GROUP:
				if (in_array(
					$n->treeNodes[0]->type,
					array(
						JS_ARRAY_INIT, JS_OBJECT_INIT, JS_GROUP,
						TOKEN_NUMBER, TOKEN_STRING, TOKEN_REGEXP, TOKEN_IDENTIFIER,
						KEYWORD_NULL, KEYWORD_THIS, KEYWORD_TRUE, KEYWORD_FALSE
					)
				))
				{
					$s = $this->parseTree($n->treeNodes[0]);
				}
				else
				{
					$s = '(' . $this->parseTree($n->treeNodes[0]) . ')';
				}
			break;

			default:
				throw new Exception('UNKNOWN TOKEN TYPE: ' . $n->type);
		}

		return $s;
	}

	private function isValidIdentifier($string)
	{
		return preg_match('/^[a-zA-Z_][a-zA-Z0-9_]*$/', $string) && !in_array($string, $this->reserved);
	}

	private function isWordChar($char)
	{
		return $char == '_' || $char == '$' || ctype_alnum($char);
	}
}

class JSParser

PSR1 recommends that each class should be in its own file to aid autoloaders.

PSR1 recommends that each class must be in a namespace of at least one level to avoid collisions.

{
	private $t;
	private $minifier;

	private $opPrecedence = array(
		';' => 0,
		',' => 1,
		'=' => 2, '?' => 2, ':' => 2,
		// The above all have to have the same precedence, see bug 330975
		'||' => 4,
		'&&' => 5,
		'|' => 6,
		'^' => 7,
		'&' => 8,
		'==' => 9, '!=' => 9, '===' => 9, '!==' => 9,
		'<' => 10, '<=' => 10, '>=' => 10, '>' => 10, 'in' => 10, 'instanceof' => 10,
		'<<' => 11, '>>' => 11, '>>>' => 11,
		'+' => 12, '-' => 12,
		'*' => 13, '/' => 13, '%' => 13,
		'delete' => 14, 'void' => 14, 'typeof' => 14,
		'!' => 14, '~' => 14, 'U+' => 14, 'U-' => 14,
		'++' => 15, '--' => 15,
		'new' => 16,
		'.' => 17,
		JS_NEW_WITH_ARGS => 0, JS_INDEX => 0, JS_CALL => 0,
		JS_ARRAY_INIT => 0, JS_OBJECT_INIT => 0, JS_GROUP => 0
	);

	private $opArity = array(
		',' => -2,
		'=' => 2,
		'?' => 3,
		'||' => 2,
		'&&' => 2,
		'|' => 2,
		'^' => 2,
		'&' => 2,
		'==' => 2, '!=' => 2, '===' => 2, '!==' => 2,
		'<' => 2, '<=' => 2, '>=' => 2, '>' => 2, 'in' => 2, 'instanceof' => 2,
		'<<' => 2, '>>' => 2, '>>>' => 2,
		'+' => 2, '-' => 2,
		'*' => 2, '/' => 2, '%' => 2,
		'delete' => 1, 'void' => 1, 'typeof' => 1,
		'!' => 1, '~' => 1, 'U+' => 1, 'U-' => 1,
		'++' => 1, '--' => 1,
		'new' => 1,
		'.' => 2,
		JS_NEW_WITH_ARGS => 2, JS_INDEX => 2, JS_CALL => 2,
		JS_ARRAY_INIT => 1, JS_OBJECT_INIT => 1, JS_GROUP => 1,
		TOKEN_CONDCOMMENT_START => 1, TOKEN_CONDCOMMENT_END => 1
	);

	public function __construct($minifier=null)
	{
		$this->minifier = $minifier;
		$this->t = new JSTokenizer();
	}

	public function parse($s, $f, $l)
	{
		// initialize tokenizer
		$this->t->init($s, $f, $l);

		$x = new JSCompilerContext(false);
		$n = $this->Script($x);
		if (!$this->t->isDone())
			throw $this->t->newSyntaxError('Syntax error');

		return $n;
	}

	private function Script($x)
	{
		$n = $this->Statements($x);
		$n->type = JS_SCRIPT;

The property $type is declared private in JSNode. Since you implemented __set(), maybe consider adding a @property or @property-write annotation. This makes it easier for IDEs to provide auto-completion.

		$n->funDecls = $x->funDecls;
		$n->varDecls = $x->varDecls;

		// minify by scope
		if ($this->minifier)
		{
			$n->value = $this->minifier->parseTree($n);

The property $value is declared private in JSNode. Since you implemented __set(), maybe consider adding a @property or @property-write annotation. This makes it easier for IDEs to provide auto-completion.

			// clear tree from node to save memory
			$n->treeNodes = null;

It seems like null of type null is incompatible with the declared type array of property $treeNodes.

			$n->funDecls = null;

It seems like null of type null is incompatible with the declared type array of property $funDecls.

			$n->varDecls = null;

It seems like null of type null is incompatible with the declared type array of property $varDecls.

			$n->type = JS_MINIFIED;

The property $type is declared private in JSNode. Since you implemented __set(), maybe consider adding a @property or @property-write annotation. This makes it easier for IDEs to provide auto-completion.

		}

		return $n;
	}

	private function Statements($x)
	{
		$n = new JSNode($this->t, JS_BLOCK);
		array_push($x->stmtStack, $n);

		while (!$this->t->isDone() && $this->t->peek() != OP_RIGHT_CURLY)
			$n->addNode($this->Statement($x));

		array_pop($x->stmtStack);

		return $n;
	}

	private function Block($x)
	{
		$this->t->mustMatch(OP_LEFT_CURLY);
		$n = $this->Statements($x);
		$this->t->mustMatch(OP_RIGHT_CURLY);

		return $n;
	}

	private function Statement($x)
	{
		$tt = $this->t->get();
		$n2 = null;

		// Cases for statements ending in a right curly return early, avoiding the
		// common semicolon insertion magic after this switch.
		switch ($tt)
		{
			case KEYWORD_FUNCTION:
				return $this->FunctionDefinition(
					$x,
					true,
					count($x->stmtStack) > 1 ? STATEMENT_FORM : DECLARED_FORM
				);
			break;

break is not strictly necessary here and could be removed.

			case OP_LEFT_CURLY:
				$n = $this->Statements($x);
				$this->t->mustMatch(OP_RIGHT_CURLY);
			return $n;

			case KEYWORD_IF:
				$n = new JSNode($this->t);
				$n->condition = $this->ParenExpression($x);

The property condition does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				array_push($x->stmtStack, $n);
				$n->thenPart = $this->Statement($x);

The property thenPart does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				$n->elsePart = $this->t->match(KEYWORD_ELSE) ? $this->Statement($x) : null;

The property elsePart does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				array_pop($x->stmtStack);
			return $n;

			case KEYWORD_SWITCH:
				$n = new JSNode($this->t);
				$this->t->mustMatch(OP_LEFT_PAREN);
				$n->discriminant = $this->Expression($x);

The property discriminant does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				$this->t->mustMatch(OP_RIGHT_PAREN);
				$n->cases = array();

The property cases does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				$n->defaultIndex = -1;

The property defaultIndex does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				array_push($x->stmtStack, $n);

				$this->t->mustMatch(OP_LEFT_CURLY);

				while (($tt = $this->t->get()) != OP_RIGHT_CURLY)
				{
					switch ($tt)
					{
						case KEYWORD_DEFAULT:
							if ($n->defaultIndex >= 0)

The property defaultIndex does not exist on object<JSNode>. Since you implemented __get, maybe consider adding a @property annotation.

								throw $this->t->newSyntaxError('More than one switch default');
							// FALL THROUGH
						case KEYWORD_CASE:
							$n2 = new JSNode($this->t);
							if ($tt == KEYWORD_DEFAULT)
								$n->defaultIndex = count($n->cases);

The property defaultIndex does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

The property cases does not exist on object<JSNode>. Since you implemented __get, maybe consider adding a @property annotation.

							else
								$n2->caseLabel = $this->Expression($x, OP_COLON);

The property caseLabel does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

OP_COLON is of type string, but the function expects a boolean.

								break;
						default:
							throw $this->t->newSyntaxError('Invalid switch case');
					}

					$this->t->mustMatch(OP_COLON);
					$n2->statements = new JSNode($this->t, JS_BLOCK);

The property statements does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

					while (($tt = $this->t->peek()) != KEYWORD_CASE && $tt != KEYWORD_DEFAULT && $tt != OP_RIGHT_CURLY)
						$n2->statements->addNode($this->Statement($x));

The property statements does not exist on object<JSNode>. Since you implemented __get, maybe consider adding a @property annotation.

					array_push($n->cases, $n2);

The property cases does not exist on object<JSNode>. Since you implemented __get, maybe consider adding a @property annotation.

				}

				array_pop($x->stmtStack);
			return $n;

			case KEYWORD_FOR:
				$n = new JSNode($this->t);
				$n->isLoop = true;

The property isLoop does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				$this->t->mustMatch(OP_LEFT_PAREN);

				if (($tt = $this->t->peek()) != OP_SEMICOLON)
				{
					$x->inForLoopInit = true;
					if ($tt == KEYWORD_VAR || $tt == KEYWORD_CONST)
					{
						$this->t->get();
						$n2 = $this->Variables($x);
					}
					else
					{
						$n2 = $this->Expression($x);
					}
					$x->inForLoopInit = false;
				}

				if ($n2 && $this->t->match(KEYWORD_IN))
				{
					$n->type = JS_FOR_IN;

The property $type is declared private in JSNode. Since you implemented __set(), maybe consider adding a @property or @property-write annotation. This makes it easier for IDEs to provide auto-completion.

					if ($n2->type == KEYWORD_VAR)
					{
						if (count($n2->treeNodes) != 1)
						{
							throw $this->t->newSyntaxError(
								'Invalid for..in left-hand side',
								$this->t->filename,

The call to JSTokenizer::newSyntaxError() has too many arguments starting with $this->t->filename.

								$n2->lineno
							);
						}

						// NB: n2[0].type == IDENTIFIER and n2[0].value == n2[0].name.
						$n->iterator = $n2->treeNodes[0];

The property iterator does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

						$n->varDecl = $n2;

The property varDecl does not seem to exist. Did you mean varDecls?

					}
					else
					{
						$n->iterator = $n2;

The property iterator does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

						$n->varDecl = null;

The property varDecl does not seem to exist. Did you mean varDecls?

					}

					$n->object = $this->Expression($x);

The property object does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				}
				else
				{
					$n->setup = $n2 ? $n2 : null;

The property setup does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

					$this->t->mustMatch(OP_SEMICOLON);
					$n->condition = $this->t->peek() == OP_SEMICOLON ? null : $this->Expression($x);

The property condition does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

					$this->t->mustMatch(OP_SEMICOLON);
					$n->update = $this->t->peek() == OP_RIGHT_PAREN ? null : $this->Expression($x);

The property update does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				}

				$this->t->mustMatch(OP_RIGHT_PAREN);
				$n->body = $this->nest($x, $n);

The property body does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

			return $n;

			case KEYWORD_WHILE:
			        $n = new JSNode($this->t);
			        $n->isLoop = true;

The property isLoop does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

			        $n->condition = $this->ParenExpression($x);

The property condition does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

			        $n->body = $this->nest($x, $n);

The property body does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

			return $n;

			case KEYWORD_DO:
				$n = new JSNode($this->t);
				$n->isLoop = true;

The property isLoop does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				$n->body = $this->nest($x, $n, KEYWORD_WHILE);

The property body does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

KEYWORD_WHILE is of type string, but the function expects a boolean.

				$n->condition = $this->ParenExpression($x);

The property condition does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				if (!$x->ecmaStrictMode)
				{
					// <script language="JavaScript"> (without version hints) may need
					// automatic semicolon insertion without a newline after do-while.
					// See http://bugzilla.mozilla.org/show_bug.cgi?id=238945.
					$this->t->match(OP_SEMICOLON);
					return $n;
				}
			break;

			case KEYWORD_BREAK:
			case KEYWORD_CONTINUE:
				$n = new JSNode($this->t);

				if ($this->t->peekOnSameLine() == TOKEN_IDENTIFIER)
				{
					$this->t->get();
					$n->label = $this->t->currentToken()->value;

The property label does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				}

				$ss = $x->stmtStack;
				$i = count($ss);
				$label = $n->label;

The property label does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				if ($label)
				{
					do
					{
						if (--$i < 0)
							throw $this->t->newSyntaxError('Label not found');
					}
					while ($ss[$i]->label != $label);
				}
				else
				{
					do
					{
						if (--$i < 0)
							throw $this->t->newSyntaxError('Invalid ' . $tt);
					}
					while (!$ss[$i]->isLoop && ($tt != KEYWORD_BREAK || $ss[$i]->type != KEYWORD_SWITCH));
				}

				$n->target = $ss[$i];

The property target does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

			break;

			case KEYWORD_TRY:
				$n = new JSNode($this->t);
				$n->tryBlock = $this->Block($x);

The property tryBlock does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				$n->catchClauses = array();

The property catchClauses does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				while ($this->t->match(KEYWORD_CATCH))
				{
					$n2 = new JSNode($this->t);
					$this->t->mustMatch(OP_LEFT_PAREN);
					$n2->varName = $this->t->mustMatch(TOKEN_IDENTIFIER)->value;

The property varName does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

					if ($this->t->match(KEYWORD_IF))
					{
						if ($x->ecmaStrictMode)
							throw $this->t->newSyntaxError('Illegal catch guard');

						if (count($n->catchClauses) && !end($n->catchClauses)->guard)

The property catchClauses does not exist on object<JSNode>. Since you implemented __get, maybe consider adding a @property annotation.

							throw $this->t->newSyntaxError('Guarded catch after unguarded');

						$n2->guard = $this->Expression($x);

The property guard does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

					}
					else
					{
						$n2->guard = null;

The property guard does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

					}

					$this->t->mustMatch(OP_RIGHT_PAREN);
					$n2->block = $this->Block($x);

The property block does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

					array_push($n->catchClauses, $n2);

The property catchClauses does not exist on object<JSNode>. Since you implemented __get, maybe consider adding a @property annotation.

				}

				if ($this->t->match(KEYWORD_FINALLY))
					$n->finallyBlock = $this->Block($x);

The property finallyBlock does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				if (!count($n->catchClauses) && !$n->finallyBlock)

The property catchClauses does not exist on object<JSNode>. Since you implemented __get, maybe consider adding a @property annotation.

The property finallyBlock does not exist on object<JSNode>. Since you implemented __get, maybe consider adding a @property annotation.

					throw $this->t->newSyntaxError('Invalid try statement');
			return $n;

			case KEYWORD_CATCH:
			case KEYWORD_FINALLY:
				throw $this->t->newSyntaxError($tt + ' without preceding try');

			case KEYWORD_THROW:
				$n = new JSNode($this->t);
				$n->value = $this->Expression($x);

The property $value is declared private in JSNode. Since you implemented __set(), maybe consider adding a @property or @property-write annotation. This makes it easier for IDEs to provide auto-completion.

			break;

			case KEYWORD_RETURN:
				if (!$x->inFunction)
					throw $this->t->newSyntaxError('Invalid return');

				$n = new JSNode($this->t);
				$tt = $this->t->peekOnSameLine();
				if ($tt != TOKEN_END && $tt != TOKEN_NEWLINE && $tt != OP_SEMICOLON && $tt != OP_RIGHT_CURLY)
					$n->value = $this->Expression($x);

The property $value is declared private in JSNode. Since you implemented __set(), maybe consider adding a @property or @property-write annotation. This makes it easier for IDEs to provide auto-completion.

				else
					$n->value = null;

The property $value is declared private in JSNode. Since you implemented __set(), maybe consider adding a @property or @property-write annotation. This makes it easier for IDEs to provide auto-completion.

			break;

			case KEYWORD_WITH:
				$n = new JSNode($this->t);
				$n->object = $this->ParenExpression($x);

The property object does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				$n->body = $this->nest($x, $n);

The property body does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

			return $n;

			case KEYWORD_VAR:
			case KEYWORD_CONST:
			        $n = $this->Variables($x);
			break;

			case TOKEN_CONDCOMMENT_START:
			case TOKEN_CONDCOMMENT_END:
				$n = new JSNode($this->t);
			return $n;

			case KEYWORD_DEBUGGER:
				$n = new JSNode($this->t);
			break;

			case TOKEN_NEWLINE:
			case OP_SEMICOLON:
				$n = new JSNode($this->t, OP_SEMICOLON);
				$n->expression = null;

The property expression does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

			return $n;

			default:
				if ($tt == TOKEN_IDENTIFIER)
				{
					$this->t->scanOperand = false;
					$tt = $this->t->peek();
					$this->t->scanOperand = true;
					if ($tt == OP_COLON)
					{
						$label = $this->t->currentToken()->value;
						$ss = $x->stmtStack;
						for ($i = count($ss) - 1; $i >= 0; --$i)
						{
							if ($ss[$i]->label == $label)
								throw $this->t->newSyntaxError('Duplicate label');
						}

						$this->t->get();
						$n = new JSNode($this->t, JS_LABEL);
						$n->label = $label;

The property label does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

						$n->statement = $this->nest($x, $n);

The property statement does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

						return $n;
					}
				}

				$n = new JSNode($this->t, OP_SEMICOLON);
				$this->t->unget();
				$n->expression = $this->Expression($x);

The property expression does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

				$n->end = $n->expression->end;

The property $end is declared private in JSNode. Since you implemented __set(), maybe consider adding a @property or @property-write annotation. This makes it easier for IDEs to provide auto-completion.

The property expression does not exist on object<JSNode>. Since you implemented __get, maybe consider adding a @property annotation.

			break;
		}

		if ($this->t->lineno == $this->t->currentToken()->lineno)
		{
			$tt = $this->t->peekOnSameLine();
			if ($tt != TOKEN_END && $tt != TOKEN_NEWLINE && $tt != OP_SEMICOLON && $tt != OP_RIGHT_CURLY)
				throw $this->t->newSyntaxError('Missing ; before statement');
		}

		$this->t->match(OP_SEMICOLON);

		return $n;
	}

	private function FunctionDefinition($x, $requireName, $functionForm)
	{
		$f = new JSNode($this->t);

		if ($f->type != KEYWORD_FUNCTION)

The property $type is declared private in JSNode. Since you implemented __get(), maybe consider adding a @property or @property-read annotation. This makes it easier for IDEs to provide auto-completion.

			$f->type = ($f->value == 'get') ? JS_GETTER : JS_SETTER;

The property $type is declared private in JSNode. Since you implemented __set(), maybe consider adding a @property or @property-write annotation. This makes it easier for IDEs to provide auto-completion.

The property $value is declared private in JSNode. Since you implemented __get(), maybe consider adding a @property or @property-read annotation. This makes it easier for IDEs to provide auto-completion.

		if ($this->t->match(TOKEN_IDENTIFIER))
			$f->name = $this->t->currentToken()->value;

The property name does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

		elseif ($requireName)
			throw $this->t->newSyntaxError('Missing function identifier');

		$this->t->mustMatch(OP_LEFT_PAREN);
			$f->params = array();

The property params does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

		while (($tt = $this->t->get()) != OP_RIGHT_PAREN)
		{
			if ($tt != TOKEN_IDENTIFIER)
				throw $this->t->newSyntaxError('Missing formal parameter');

			array_push($f->params, $this->t->currentToken()->value);

The property params does not exist on object<JSNode>. Since you implemented __get, maybe consider adding a @property annotation.

			if ($this->t->peek() != OP_RIGHT_PAREN)
				$this->t->mustMatch(OP_COMMA);
		}

		$this->t->mustMatch(OP_LEFT_CURLY);

		$x2 = new JSCompilerContext(true);
		$f->body = $this->Script($x2);

The property body does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

		$this->t->mustMatch(OP_RIGHT_CURLY);
		$f->end = $this->t->currentToken()->end;

The property $end is declared private in JSNode. Since you implemented __set(), maybe consider adding a @property or @property-write annotation. This makes it easier for IDEs to provide auto-completion.

		$f->functionForm = $functionForm;

The property functionForm does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

		if ($functionForm == DECLARED_FORM)
			array_push($x->funDecls, $f);

		return $f;
	}

	private function Variables($x)
	{
		$n = new JSNode($this->t);

		do
		{
			$this->t->mustMatch(TOKEN_IDENTIFIER);

			$n2 = new JSNode($this->t);
			$n2->name = $n2->value;

The property $value is declared private in JSNode. Since you implemented __get(), maybe consider adding a @property or @property-read annotation. This makes it easier for IDEs to provide auto-completion.

The property name does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

			if ($this->t->match(OP_ASSIGN))
			{
				if ($this->t->currentToken()->assignOp)
					throw $this->t->newSyntaxError('Invalid variable initialization');

				$n2->initializer = $this->Expression($x, OP_COMMA);

The property initializer does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

OP_COMMA is of type string, but the function expects a boolean.

			}

			$n2->readOnly = $n->type == KEYWORD_CONST;

The property $type is declared private in JSNode. Since you implemented __get(), maybe consider adding a @property or @property-read annotation. This makes it easier for IDEs to provide auto-completion.

The property readOnly does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

			$n->addNode($n2);
			array_push($x->varDecls, $n2);
		}
		while ($this->t->match(OP_COMMA));

		return $n;
	}

	private function Expression($x, $stop=false)
	{
		$operators = array();
		$operands = array();
		$n = false;

$n is not used, you could remove the assignment.

		$bl = $x->bracketLevel;
		$cl = $x->curlyLevel;
		$pl = $x->parenLevel;
		$hl = $x->hookLevel;

		while (($tt = $this->t->get()) != TOKEN_END)
		{
			if ($tt == $stop &&
				$x->bracketLevel == $bl &&
				$x->curlyLevel == $cl &&
				$x->parenLevel == $pl &&
				$x->hookLevel == $hl
			)
			{
				// Stop only if tt matches the optional stop parameter, and that
				// token is not quoted by some kind of bracket.
				break;
			}

			switch ($tt)
			{
				case OP_SEMICOLON:
					// NB: cannot be empty, Statement handled that.
					break 2;

				case OP_HOOK:
					if ($this->t->scanOperand)
						break 2;

					while (	!empty($operators) &&
						$this->opPrecedence[end($operators)->type] > $this->opPrecedence[$tt]
					)
						$this->reduce($operators, $operands);

					array_push($operators, new JSNode($this->t));

					++$x->hookLevel;
					$this->t->scanOperand = true;
					$n = $this->Expression($x);

					if (!$this->t->match(OP_COLON))
						break 2;

					--$x->hookLevel;
					array_push($operands, $n);
				break;

				case OP_COLON:
					if ($x->hookLevel)
						break 2;

					throw $this->t->newSyntaxError('Invalid label');
				break;

break; does not seem to be reachable.

				case OP_ASSIGN:
					if ($this->t->scanOperand)
						break 2;

					// Use >, not >=, for right-associative ASSIGN
					while (	!empty($operators) &&
						$this->opPrecedence[end($operators)->type] > $this->opPrecedence[$tt]
					)
						$this->reduce($operators, $operands);

					array_push($operators, new JSNode($this->t));
					end($operands)->assignOp = $this->t->currentToken()->assignOp;
					$this->t->scanOperand = true;
				break;

				case KEYWORD_IN:
					// An in operator should not be parsed if we're parsing the head of
					// a for (...) loop, unless it is in the then part of a conditional
					// expression, or parenthesized somehow.
					if ($x->inForLoopInit && !$x->hookLevel &&
						!$x->bracketLevel && !$x->curlyLevel &&
						!$x->parenLevel
					)
						break 2;
				// FALL THROUGH
				case OP_COMMA:
					// A comma operator should not be parsed if we're parsing the then part
					// of a conditional expression unless it's parenthesized somehow.
					if ($tt == OP_COMMA && $x->hookLevel &&
						!$x->bracketLevel && !$x->curlyLevel &&
						!$x->parenLevel
					)
						break 2;
				// Treat comma as left-associative so reduce can fold left-heavy
				// COMMA trees into a single array.
				// FALL THROUGH
				case OP_OR:
				case OP_AND:
				case OP_BITWISE_OR:
				case OP_BITWISE_XOR:
				case OP_BITWISE_AND:
				case OP_EQ: case OP_NE: case OP_STRICT_EQ: case OP_STRICT_NE:

The case body in a switch statement must start on the line following the statement.

				case OP_LT: case OP_LE: case OP_GE: case OP_GT:

The case body in a switch statement must start on the line following the statement.

				case KEYWORD_INSTANCEOF:
				case OP_LSH: case OP_RSH: case OP_URSH:

The case body in a switch statement must start on the line following the statement.

				case OP_PLUS: case OP_MINUS:

The case body in a switch statement must start on the line following the statement.

				case OP_MUL: case OP_DIV: case OP_MOD:

The case body in a switch statement must start on the line following the statement.

				case OP_DOT:
					if ($this->t->scanOperand)
						break 2;

					while (	!empty($operators) &&
						$this->opPrecedence[end($operators)->type] >= $this->opPrecedence[$tt]
					)
						$this->reduce($operators, $operands);

					if ($tt == OP_DOT)
					{
						$this->t->mustMatch(TOKEN_IDENTIFIER);
						array_push($operands, new JSNode($this->t, OP_DOT, array_pop($operands), new JSNode($this->t)));
					}
					else
					{
						array_push($operators, new JSNode($this->t));
						$this->t->scanOperand = true;
					}
				break;

				case KEYWORD_DELETE: case KEYWORD_VOID: case KEYWORD_TYPEOF:

The case body in a switch statement must start on the line following the statement.

				case OP_NOT: case OP_BITWISE_NOT: case OP_UNARY_PLUS: case OP_UNARY_MINUS:

The case body in a switch statement must start on the line following the statement.

				case KEYWORD_NEW:
					if (!$this->t->scanOperand)
						break 2;

					array_push($operators, new JSNode($this->t));
				break;

				case OP_INCREMENT: case OP_DECREMENT:

The case body in a switch statement must start on the line following the statement.

					if ($this->t->scanOperand)
					{
						array_push($operators, new JSNode($this->t));  // prefix increment or decrement
					}
					else
					{
						// Don't cross a line boundary for postfix {in,de}crement.
						$t = $this->t->tokens[($this->t->tokenIndex + $this->t->lookahead - 1) & 3];
						if ($t && $t->lineno != $this->t->lineno)
							break 2;

						if (!empty($operators))
						{
							// Use >, not >=, so postfix has higher precedence than prefix.
							while ($this->opPrecedence[end($operators)->type] > $this->opPrecedence[$tt])
								$this->reduce($operators, $operands);
						}

						$n = new JSNode($this->t, $tt, array_pop($operands));
						$n->postfix = true;

The property postfix does not exist on object<JSNode>. Since you implemented __set, maybe consider adding a @property annotation.

						array_push($operands, $n);
					}
				break;

				case KEYWORD_FUNCTION:
					if (!$this->t->scanOperand)
						break 2;

					array_push($operands, $this->FunctionDefinition($x, false, EXPRESSED_FORM));
					$this->t->scanOperand = false;
				break;

				case KEYWORD_NULL: case KEYWORD_THIS: case KEYWORD_TRUE: case KEYWORD_FALSE:

The case body in a switch statement must start on the line following the statement.

				case TOKEN_IDENTIFIER: case TOKEN_NUMBER: case TOKEN_STRING: case TOKEN_REGEXP:

The case body in a switch statement must start on the line following the statement.

					if (!$this->t->scanOperand)
						break 2;

					array_push($operands, new JSNode($this->t));
					$this->t->scanOperand = false;
				break;

				case TOKEN_CONDCOMMENT_START:
				case TOKEN_CONDCOMMENT_END:
					if ($this->t->scanOperand)
						array_push($operators, new JSNode($this->t));
					else
						array_push($operands, new JSNode($this->t));
				break;

				case OP_LEFT_BRACKET:
					if ($this->t->scanOperand)
					{
						// Array initialiser.  Parse using recursive descent, as the
						// sub-grammar here is not an operator grammar.
						$n = new JSNode($this->t, JS_ARRAY_INIT);
						while (($tt = $this->t->peek()) != OP_RIGHT_BRACKET)
						{
							if ($tt == OP_COMMA)
							{
								$this->t->get();
								$n->addNode(null);
								continue;
							}

							$n->addNode($this->Expression($x, OP_COMMA));

OP_COMMA is of type string, but the function expects a boolean.

							if (!$this->t->match(OP_COMMA))
								break;
						}

						$this->t->mustMatch(OP_RIGHT_BRACKET);
						array_push($operands, $n);
						$this->t->scanOperand = false;
					}
					else
					{
						// Property indexing operator.
						array_push($operators, new JSNode($this->t, JS_INDEX));
						$this->t->scanOperand = true;
						++$x->bracketLevel;
					}
				break;

				case OP_RIGHT_BRACKET:
					if ($this->t->scanOperand || $x->bracketLevel == $bl)
						break 2;

					while ($this->reduce($operators, $operands)->type != JS_INDEX)
						continue;

					--$x->bracketLevel;
				break;

				case OP_LEFT_CURLY:
					if (!$this->t->scanOperand)
						break 2;

					// Object initialiser.  As for array initialisers (see above),
					// parse using recursive descent.
					++$x->curlyLevel;
					$n = new JSNode($this->t, JS_OBJECT_INIT);
					while (!$this->t->match(OP_RIGHT_CURLY))
					{
						do
						{
							$tt = $this->t->get();
							$tv = $this->t->currentToken()->value;
							if (($tv == 'get' || $tv == 'set') && $this->t->peek() == TOKEN_IDENTIFIER)
							{
								if ($x->ecmaStrictMode)
									throw $this->t->newSyntaxError('Illegal property accessor');

								$n->addNode($this->FunctionDefinition($x, true, EXPRESSED_FORM));
							}
							else
							{
								switch ($tt)
								{
									case TOKEN_IDENTIFIER:
									case TOKEN_NUMBER:
									case TOKEN_STRING:
										$id = new JSNode($this->t);
									break;

									case OP_RIGHT_CURLY:
										if ($x->ecmaStrictMode)
											throw $this->t->newSyntaxError('Illegal trailing ,');
									break 3;

									default:
										throw $this->t->newSyntaxError('Invalid property name');
								}

								$this->t->mustMatch(OP_COLON);
								$n->addNode(new JSNode($this->t, JS_PROPERTY_INIT, $id, $this->Expression($x, OP_COMMA)));

OP_COMMA is of type string, but the function expects a boolean.

							}
						}
						while ($this->t->match(OP_COMMA));

						$this->t->mustMatch(OP_RIGHT_CURLY);
						break;
					}

					array_push($operands, $n);
					$this->t->scanOperand = false;
					--$x->curlyLevel;
				break;

				case OP_RIGHT_CURLY:
					if (!$this->t->scanOperand && $x->curlyLevel != $cl)
						throw new Exception('PANIC: right curly botch');
				break 2;

				case OP_LEFT_PAREN:
					if ($this->t->scanOperand)
					{
						array_push($operators, new JSNode($this->t, JS_GROUP));
					}
					else
					{
						while (	!empty($operators) &&
							$this->opPrecedence[end($operators)->type] > $this->opPrecedence[KEYWORD_NEW]
						)
							$this->reduce($operators, $operands);

						// Handle () now, to regularize the n-ary case for n > 0.
						// We must set scanOperand in case there are arguments and
						// the first one is a regexp or unary+/-.
						$n = end($operators);
						$this->t->scanOperand = true;
						if ($this->t->match(OP_RIGHT_PAREN))
						{
							if ($n && $n->type == KEYWORD_NEW)
							{
								array_pop($operators);
								$n->addNode(array_pop($operands));
							}
							else
							{
								$n = new JSNode($this->t, JS_CALL, array_pop($operands), new JSNode($this->t, JS_LIST));
							}

							array_push($operands, $n);
							$this->t->scanOperand = false;
							break;
						}

						if ($n && $n->type == KEYWORD_NEW)
							$n->type = JS_NEW_WITH_ARGS;
						else
							array_push($operators, new JSNode($this->t, JS_CALL));
					}

					++$x->parenLevel;
				break;

				case OP_RIGHT_PAREN:
					if ($this->t->scanOperand || $x->parenLevel == $pl)
						break 2;

					while (($tt = $this->reduce($operators, $operands)->type) != JS_GROUP &&
						$tt != JS_CALL && $tt != JS_NEW_WITH_ARGS
					)
					{
						continue;
					}

					if ($tt != JS_GROUP)
					{
						$n = end($operands);
						if ($n->treeNodes[1]->type != OP_COMMA)
							$n->treeNodes[1] = new JSNode($this->t, JS_LIST, $n->treeNodes[1]);
						else
							$n->treeNodes[1]->type = JS_LIST;
					}

					--$x->parenLevel;
				break;

				// Automatic semicolon insertion means we may scan across a newline
				// and into the beginning of another statement.  If so, break out of
				// the while loop and let the t.scanOperand logic handle errors.
				default:
					break 2;
			}
		}

		if ($x->hookLevel != $hl)
			throw $this->t->newSyntaxError('Missing : in conditional expression');

		if ($x->parenLevel != $pl)
			throw $this->t->newSyntaxError('Missing ) in parenthetical');

		if ($x->bracketLevel != $bl)
			throw $this->t->newSyntaxError('Missing ] in index expression');

		if ($this->t->scanOperand)
			throw $this->t->newSyntaxError('Missing operand');

		// Resume default mode, scanning for operands, not operators.
		$this->t->scanOperand = true;
		$this->t->unget();

		while (count($operators))
			$this->reduce($operators, $operands);

		return array_pop($operands);
	}

	private function ParenExpression($x)
	{
		$this->t->mustMatch(OP_LEFT_PAREN);
		$n = $this->Expression($x);
		$this->t->mustMatch(OP_RIGHT_PAREN);

		return $n;
	}

	// Statement stack and nested statement handler.
	private function nest($x, $node, $end = false)
	{
		array_push($x->stmtStack, $node);
		$n = $this->statement($x);
		array_pop($x->stmtStack);

		if ($end)
			$this->t->mustMatch($end);

		return $n;
	}

	private function reduce(&$operators, &$operands)
	{
		$n = array_pop($operators);
		$op = $n->type;
		$arity = $this->opArity[$op];
		$c = count($operands);
		if ($arity == -2)
		{
			// Flatten left-associative trees
			if ($c >= 2)
			{
				$left = $operands[$c - 2];
				if ($left->type == $op)
				{
					$right = array_pop($operands);
					$left->addNode($right);
					return $left;
				}
			}
			$arity = 2;
		}

		// Always use push to add operands to n, to update start and end
		$a = array_splice($operands, $c - $arity);
		for ($i = 0; $i < $arity; $i++)
			$n->addNode($a[$i]);

		// Include closing bracket or postfix operator in [start,end]
		$te = $this->t->currentToken()->end;
		if ($n->end < $te)
			$n->end = $te;

		array_push($operands, $n);

		return $n;
	}
}

class JSCompilerContext

PSR1 recommends that each class should be in its own file to aid autoloaders.

PSR1 recommends that each class must be in a namespace of at least one level to avoid collisions.

{
	public $inFunction = false;
	public $inForLoopInit = false;
	public $ecmaStrictMode = false;
	public $bracketLevel = 0;
	public $curlyLevel = 0;
	public $parenLevel = 0;
	public $hookLevel = 0;

	public $stmtStack = array();
	public $funDecls = array();
	public $varDecls = array();

	public function __construct($inFunction)
	{
		$this->inFunction = $inFunction;
	}
}

class JSNode

PSR1 recommends that each class should be in its own file to aid autoloaders.

PSR1 recommends that each class must be in a namespace of at least one level to avoid collisions.

{
	private $type;
	private $value;
	private $lineno;
	private $start;
	private $end;

	public $treeNodes = array();
	public $funDecls = array();
	public $varDecls = array();

	public function __construct($t, $type=0)
	{
		if ($token = $t->currentToken())
		{
			$this->type = $type ? $type : $token->type;
			$this->value = $token->value;
			$this->lineno = $token->lineno;
			$this->start = $token->start;
			$this->end = $token->end;
		}
		else
		{
			$this->type = $type;
			$this->lineno = $t->lineno;
		}

		if (($numargs = func_num_args()) > 2)
		{
			$args = func_get_args();
			for ($i = 2; $i < $numargs; $i++)
				$this->addNode($args[$i]);
		}
	}

	// we don't want to bloat our object with all kind of specific properties, so we use overloading
	public function __set($name, $value)
	{
		$this->$name = $value;
	}

	public function __get($name)
	{
		if (isset($this->$name))
			return $this->$name;

		return null;
	}

	public function addNode($node)
	{
		if ($node !== null)
		{
			if ($node->start < $this->start)
				$this->start = $node->start;
			if ($this->end < $node->end)
				$this->end = $node->end;
		}

		$this->treeNodes[] = $node;
	}
}

class JSTokenizer

PSR1 recommends that each class should be in its own file to aid autoloaders.

PSR1 recommends that each class must be in a namespace of at least one level to avoid collisions.

{
	private $cursor = 0;
	private $source;

	public $tokens = array();
	public $tokenIndex = 0;
	public $lookahead = 0;
	public $scanNewlines = false;
	public $scanOperand = true;

	public $filename;
	public $lineno;

	private $keywords = array(
		'break',
		'case', 'catch', 'const', 'continue',
		'debugger', 'default', 'delete', 'do',
		'else', 'enum',
		'false', 'finally', 'for', 'function',
		'if', 'in', 'instanceof',
		'new', 'null',
		'return',
		'switch',
		'this', 'throw', 'true', 'try', 'typeof',
		'var', 'void',
		'while', 'with'
	);

	private $opTypeNames = array(
		';', ',', '?', ':', '||', '&&', '|', '^',
		'&', '===', '==', '=', '!==', '!=', '<<', '<=',
		'<', '>>>', '>>', '>=', '>', '++', '--', '+',
		'-', '*', '/', '%', '!', '~', '.', '[',
		']', '{', '}', '(', ')', '@*/'
	);

	private $assignOps = array('|', '^', '&', '<<', '>>', '>>>', '+', '-', '*', '/', '%');
	private $opRegExp;

	public function __construct()
	{
		$this->opRegExp = '#^(' . implode('|', array_map('preg_quote', $this->opTypeNames)) . ')#';
	}

	public function init($source, $filename = '', $lineno = 1)
	{
		$this->source = $source;
		$this->filename = $filename ? $filename : '[inline]';
		$this->lineno = $lineno;

		$this->cursor = 0;
		$this->tokens = array();
		$this->tokenIndex = 0;
		$this->lookahead = 0;
		$this->scanNewlines = false;
		$this->scanOperand = true;
	}

	public function getInput($chunksize)
	{
		if ($chunksize)
			return substr($this->source, $this->cursor, $chunksize);

		return substr($this->source, $this->cursor);
	}

	public function isDone()
	{
		return $this->peek() == TOKEN_END;
	}

	public function match($tt)
	{
		return $this->get() == $tt || $this->unget();
	}

	public function mustMatch($tt)
	{
	        if (!$this->match($tt))
			throw $this->newSyntaxError('Unexpected token; token ' . $tt . ' expected');

		return $this->currentToken();
	}

	public function peek()
	{
		if ($this->lookahead)
		{
			$next = $this->tokens[($this->tokenIndex + $this->lookahead) & 3];
			if ($this->scanNewlines && $next->lineno != $this->lineno)
				$tt = TOKEN_NEWLINE;
			else
				$tt = $next->type;
		}
		else
		{
			$tt = $this->get();
			$this->unget();
		}

		return $tt;
	}

	public function peekOnSameLine()
	{
		$this->scanNewlines = true;
		$tt = $this->peek();
		$this->scanNewlines = false;

		return $tt;
	}

	public function currentToken()
	{
		if (!empty($this->tokens))
			return $this->tokens[$this->tokenIndex];
	}

	public function get($chunksize = 1000)
	{
		while($this->lookahead)
		{
			$this->lookahead--;
			$this->tokenIndex = ($this->tokenIndex + 1) & 3;
			$token = $this->tokens[$this->tokenIndex];
			if ($token->type != TOKEN_NEWLINE || $this->scanNewlines)
				return $token->type;
		}

		$conditional_comment = false;

		// strip whitespace and comments
		while(true)
		{
			$input = $this->getInput($chunksize);

			// whitespace handling; gobble up \r as well (effectively we don't have support for MAC newlines!)
			$re = $this->scanNewlines ? '/^[ \r\t]+/' : '/^\s+/';
			if (preg_match($re, $input, $match))
			{
				$spaces = $match[0];
				$spacelen = strlen($spaces);
				$this->cursor += $spacelen;
				if (!$this->scanNewlines)
					$this->lineno += substr_count($spaces, "\n");

				if ($spacelen == $chunksize)
					continue; // complete chunk contained whitespace

				$input = $this->getInput($chunksize);
				if ($input == '' || $input[0] != '/')
					break;
			}

			// Comments
			if (!preg_match('/^\/(?:\*(@(?:cc_on|if|elif|else|end))?.*?\*\/|\/[^\n]*)/s', $input, $match))
			{
				if (!$chunksize)

The expression $chunksize of type integer|null is loosely compared to false; this is ambiguous if the integer can be zero. You might want to explicitly use === null instead.

					break;

				// retry with a full chunk fetch; this also prevents breakage of long regular expressions (which will never match a comment)
				$chunksize = null;
				continue;
			}

			// check if this is a conditional (JScript) comment
			if (!empty($match[1]))
			{
				$match[0] = '/*' . $match[1];
				$conditional_comment = true;
				break;
			}
			else
			{
				$this->cursor += strlen($match[0]);
				$this->lineno += substr_count($match[0], "\n");
			}
		}

		if ($input == '')
		{
			$tt = TOKEN_END;
			$match = array('');
		}
		elseif ($conditional_comment)
		{
			$tt = TOKEN_CONDCOMMENT_START;
		}
		else
		{
			switch ($input[0])

The variable $input does not seem to be defined for all execution paths leading up to this point.

			{
				case '0':
					// hexadecimal
					if (($input[1] == 'x' || $input[1] == 'X') && preg_match('/^0x[0-9a-f]+/i', $input, $match))
					{
						$tt = TOKEN_NUMBER;
						break;
					}
				// FALL THROUGH

				case '1': case '2': case '3': case '4': case '5':

The case body in a switch statement must start on the line following the statement.

				case '6': case '7': case '8': case '9':

The case body in a switch statement must start on the line following the statement.

					// should always match
					preg_match('/^\d+(?:\.\d*)?(?:[eE][-+]?\d+)?/', $input, $match);
					$tt = TOKEN_NUMBER;
				break;

				case "'":
					if (preg_match('/^\'(?:[^\\\\\'\r\n]++|\\\\(?:.|\r?\n))*\'/', $input, $match))
					{
						$tt = TOKEN_STRING;
					}
					else
					{
						if ($chunksize)

The expression $chunksize of type integer|null is loosely compared to true; this is ambiguous if the integer can be zero. You might want to explicitly use !== null instead.

							return $this->get(null); // retry with a full chunk fetch

						throw $this->newSyntaxError('Unterminated string literal');
					}
				break;

				case '"':
					if (preg_match('/^"(?:[^\\\\"\r\n]++|\\\\(?:.|\r?\n))*"/', $input, $match))
					{
						$tt = TOKEN_STRING;
					}
					else
					{
						if ($chunksize)

The expression $chunksize of type integer|null is loosely compared to true; this is ambiguous if the integer can be zero. You might want to explicitly use !== null instead.

							return $this->get(null); // retry with a full chunk fetch

						throw $this->newSyntaxError('Unterminated string literal');
					}
				break;

				case '/':
					if ($this->scanOperand && preg_match('/^\/((?:\\\\.|\[(?:\\\\.|[^\]])*\]|[^\/])+)\/([gimy]*)/', $input, $match))
					{
						$tt = TOKEN_REGEXP;
						break;
					}
				// FALL THROUGH

				case '|':
				case '^':
				case '&':
				case '<':
				case '>':
				case '+':
				case '-':
				case '*':
				case '%':
				case '=':
				case '!':
					// should always match
					preg_match($this->opRegExp, $input, $match);
					$op = $match[0];
					if (in_array($op, $this->assignOps) && $input[strlen($op)] == '=')
					{
						$tt = OP_ASSIGN;
						$match[0] .= '=';
					}
					else
					{
						$tt = $op;
						if ($this->scanOperand)
						{
							if ($op == OP_PLUS)
								$tt = OP_UNARY_PLUS;
							elseif ($op == OP_MINUS)
								$tt = OP_UNARY_MINUS;
						}
						$op = null;
					}
				break;

				case '.':
					if (preg_match('/^\.\d+(?:[eE][-+]?\d+)?/', $input, $match))
					{
						$tt = TOKEN_NUMBER;
						break;
					}
				// FALL THROUGH

				case ';':
				case ',':
				case '?':
				case ':':
				case '~':
				case '[':
				case ']':
				case '{':
				case '}':
				case '(':
				case ')':
					// these are all single
					$match = array($input[0]);
					$tt = $input[0];
				break;

				case '@':
					// check end of conditional comment
					if (substr($input, 0, 3) == '@*/')
					{
						$match = array('@*/');
						$tt = TOKEN_CONDCOMMENT_END;
					}
					else
						throw $this->newSyntaxError('Illegal token');
				break;

				case "\n":
					if ($this->scanNewlines)
					{
						$match = array("\n");
						$tt = TOKEN_NEWLINE;
					}
					else
						throw $this->newSyntaxError('Illegal token');
				break;

				default:
					// FIXME: add support for unicode and unicode escape sequence \uHHHH
					if (preg_match('/^[$\w]+/', $input, $match))
					{
						$tt = in_array($match[0], $this->keywords) ? $match[0] : TOKEN_IDENTIFIER;
					}
					else
						throw $this->newSyntaxError('Illegal token');
			}
		}

		$this->tokenIndex = ($this->tokenIndex + 1) & 3;

		if (!isset($this->tokens[$this->tokenIndex]))
			$this->tokens[$this->tokenIndex] = new JSToken();

		$token = $this->tokens[$this->tokenIndex];
		$token->type = $tt;

		if ($tt == OP_ASSIGN)
			$token->assignOp = $op;

The variable $op does not seem to be defined for all execution paths leading up to this point.

		$token->start = $this->cursor;

		$token->value = $match[0];

The variable $match does not seem to be defined for all execution paths leading up to this point.

		$this->cursor += strlen($match[0]);

		$token->end = $this->cursor;
		$token->lineno = $this->lineno;

		return $tt;
	}

	public function unget()
	{
		if (++$this->lookahead == 4)
			throw $this->newSyntaxError('PANIC: too much lookahead!');

		$this->tokenIndex = ($this->tokenIndex - 1) & 3;
	}

	public function newSyntaxError($m)
	{
		return new Exception('Parse error: ' . $m . ' in file \'' . $this->filename . '\' on line ' . $this->lineno);
	}
}

class JSToken

PSR1 recommends that each class should be in its own file to aid autoloaders.

PSR1 recommends that each class must be in a namespace of at least one level to avoid collisions.

{
	public $type;
	public $value;
	public $start;
	public $end;
	public $lineno;
	public $assignOp;
}