Minify::restoreExtractedData() - Code Metrics - Inspection of "Add data directly without checking paths" - matthiasmullie/minify - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#359)

unknown

created 2021-02-10 12:08 UTC

Minify::restoreExtractedData() A

↳ Parent: Minify

Complexity

Conditions	2
Paths	2

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
dl	0
loc	13
rs	9.8333
c	0
b	0
f	0
cc	2
nc	2
nop	1

<?php
/**
 * Abstract minifier class
 *
 * Please report bugs on https://github.com/matthiasmullie/minify/issues
 *
 * @author Matthias Mullie <[email protected]>
 * @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved
 * @license MIT License
 */
namespace MatthiasMullie\Minify;

use MatthiasMullie\Minify\Exceptions\IOException;
use Psr\Cache\CacheItemInterface;

/**
 * Abstract minifier class.
 *
 * Please report bugs on https://github.com/matthiasmullie/minify/issues
 *
 * @package Minify
 * @author Matthias Mullie <[email protected]>
 * @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved
 * @license MIT License
 */
abstract class Minify
{
    /**
     * The data to be minified.
     *
     * @var string[]
     */
    protected $data = array();

    /**
     * Array of patterns to match.
     *
     * @var string[]
     */
    protected $patterns = array();

    /**
     * This array will hold content of strings and regular expressions that have
     * been extracted from the JS source code, so we can reliably match "code",
     * without having to worry about potential "code-like" characters inside.
     *
     * @var string[]
     */
    public $extracted = array();

    /**
     * Init the minify class - optionally, code may be passed along already.
     */
    public function __construct(/* $data = null, ... */)
    {
        // it's possible to add the source through the constructor as well ;)
        if (func_num_args()) {
            call_user_func_array(array($this, 'add'), func_get_args());
        }
    }

    /**
     * Add a file or straight-up code to be minified.
     *
     * @param string|string[] $data
     *
     * @return static
     */
    public function add($data /* $data = null, ... */)
    {
        // bogus "usage" of parameter $data: scrutinizer warns this variable is
        // not used (we're using func_get_args instead to support overloading),
        // but it still needs to be defined because it makes no sense to have
        // this function without argument :)
        $args = array($data) + func_get_args();

        // this method can be overloaded
        foreach ($args as $data) {
            if (is_array($data)) {
                call_user_func_array(array($this, 'add'), $data);
                continue;
            }

            // redefine var
            $data = (string) $data;

            // load data
            $value = $this->load($data);
            $key = ($data != $value) ? $data : count($this->data);

            // replace CR linefeeds etc.
            // @see https://github.com/matthiasmullie/minify/pull/139
            $value = str_replace(array("\r\n", "\r"), "\n", $value);

            // store data
            $this->data[$key] = $value;
        }

        return $this;
    }

    /**
     * Add a file to be minified.
     *
     * @param string|string[] $data
     *
     * @return static
     *
     * @throws IOException
     */
    public function addFile($data /* $data = null, ... */)
    {
        // bogus "usage" of parameter $data: scrutinizer warns this variable is
        // not used (we're using func_get_args instead to support overloading),
        // but it still needs to be defined because it makes no sense to have
        // this function without argument :)
        $args = array($data) + func_get_args();

        // this method can be overloaded
        foreach ($args as $path) {
            if (is_array($path)) {
                call_user_func_array(array($this, 'addFile'), $path);
                continue;
            }

            // redefine var
            $path = (string) $path;

            // check if we can read the file
            if (!$this->canImportFile($path)) {
                throw new IOException('The file "'.$path.'" could not be opened for reading. Check if PHP has enough permissions.');
            }

            $this->add($path);
        }

        return $this;
    }

	/**
	 * Add data with path and content without doing any check.
	 *
	 * @param string $path    File path to be minified.
	 * @param string $content Content to be minified.
	 *
	 * @return static
	 */
	public function addData( $path, $content ) {
		$this->data[ $path ] = $content;

		return $this;
	}

	/**
     * Minify the data & (optionally) saves it to a file.
     *
     * @param string[optional] $path Path to write the data to
     *
     * @return string The minified data
     */
    public function minify($path = null)
    {
        $content = $this->execute($path);

        // save to path
        if ($path !== null) {
            $this->save($content, $path);
        }

        return $content;
    }

    /**
     * Minify & gzip the data & (optionally) saves it to a file.
     *
     * @param string[optional] $path  Path to write the data to
     * @param int[optional]    $level Compression level, from 0 to 9
     *
     * @return string The minified & gzipped data
     */
    public function gzip($path = null, $level = 9)
    {
        $content = $this->execute($path);
        $content = gzencode($content, $level, FORCE_GZIP);

        // save to path
        if ($path !== null) {
            $this->save($content, $path);
        }

        return $content;
    }

    /**
     * Minify the data & write it to a CacheItemInterface object.
     *
     * @param CacheItemInterface $item Cache item to write the data to
     *
     * @return CacheItemInterface Cache item with the minifier data
     */
    public function cache(CacheItemInterface $item)
    {
        $content = $this->execute();
        $item->set($content);

        return $item;
    }

    /**
     * Minify the data.
     *
     * @param string[optional] $path Path to write the data to
     *
     * @return string The minified data
     */
    abstract public function execute($path = null);

    /**
     * Load data.
     *
     * @param string $data Either a path to a file or the content itself
     *
     * @return string
     */
    protected function load($data)
    {
        // check if the data is a file
        if ($this->canImportFile($data)) {
            $data = file_get_contents($data);

            // strip BOM, if any
            if (substr($data, 0, 3) == "\xef\xbb\xbf") {
                $data = substr($data, 3);
            }
        }

        return $data;
    }

    /**
     * Save to file.
     *
     * @param string $content The minified data
     * @param string $path    The path to save the minified data to
     *
     * @throws IOException
     */
    protected function save($content, $path)
    {
        $handler = $this->openFileForWriting($path);

        $this->writeToFile($handler, $content);

        @fclose($handler);
// For example instead of
@mkdir($dir);

// Better use
if (@mkdir($dir) === false) {
    throw new \RuntimeException('The directory '.$dir.' could not be created.');
}
    }

    /**
     * Register a pattern to execute against the source content.
     *
     * If $replacement is a string, it must be plain text. Placeholders like $1 or \2 don't work.
     * If you need that functionality, use a callback instead.
     *
     * @param string          $pattern     PCRE pattern
     * @param string|callable $replacement Replacement value for matched pattern
     */
    protected function registerPattern($pattern, $replacement = '')
    {
        // study the pattern, we'll execute it more than once
        $pattern .= 'S';

        $this->patterns[] = array($pattern, $replacement);
    }

    /**
     * We can't "just" run some regular expressions against JavaScript: it's a
     * complex language. E.g. having an occurrence of // xyz would be a comment,
     * unless it's used within a string. Of you could have something that looks
     * like a 'string', but inside a comment.
     * The only way to accurately replace these pieces is to traverse the JS one
     * character at a time and try to find whatever starts first.
     *
     * @param string $content The content to replace patterns in
     *
     * @return string The (manipulated) content
     */
    protected function replace($content)
    {
        $contentLength = strlen($content);
        $output = '';
        $processedOffset = 0;
        $positions = array_fill(0, count($this->patterns), -1);
        $matches = array();

        while ($processedOffset < $contentLength) {
            // find first match for all patterns
            foreach ($this->patterns as $i => $pattern) {
                list($pattern, $replacement) = $pattern;

                // we can safely ignore patterns for positions we've unset earlier,
                // because we know these won't show up anymore
                if (array_key_exists($i, $positions) == false) {

                    continue;
                }

                // no need to re-run matches that are still in the part of the
                // content that hasn't been processed
                if ($positions[$i] >= $processedOffset) {
                    continue;
                }

                $match = null;
                if (preg_match($pattern, $content, $match, PREG_OFFSET_CAPTURE, $processedOffset)) {
                    $matches[$i] = $match;

                    // we'll store the match position as well; that way, we
                    // don't have to redo all preg_matches after changing only
                    // the first (we'll still know where those others are)
                    $positions[$i] = $match[0][1];
                } else {
                    // if the pattern couldn't be matched, there's no point in
                    // executing it again in later runs on this same content;
                    // ignore this one until we reach end of content
                    unset($matches[$i], $positions[$i]);
                }
            }

            // no more matches to find: everything's been processed, break out
            if (!$matches) {

                // output the remaining content
                $output .= substr($content, $processedOffset);
                break;
            }

            // see which of the patterns actually found the first thing (we'll
            // only want to execute that one, since we're unsure if what the
            // other found was not inside what the first found)
            $matchOffset = min($positions);
            $firstPattern = array_search($matchOffset, $positions);
            $match = $matches[$firstPattern];

            // execute the pattern that matches earliest in the content string
            list(, $replacement) = $this->patterns[$firstPattern];

            // add the part of the input between $processedOffset and the first match;
            // that content wasn't matched by anything
            $output .= substr($content, $processedOffset, $matchOffset - $processedOffset);
            // add the replacement for the match
            $output .= $this->executeReplacement($replacement, $match);
            // advance $processedOffset past the match
            $processedOffset = $matchOffset + strlen($match[0][0]);
        }

        return $output;
    }

    /**
     * If $replacement is a callback, execute it, passing in the match data.
     * If it's a string, just pass it through.
     *
     * @param string|callable $replacement Replacement value
     * @param array           $match       Match data, in PREG_OFFSET_CAPTURE form
     *
     * @return string
     */
    protected function executeReplacement($replacement, $match)
    {
        if (!is_callable($replacement)) {
            return $replacement;
        }
        // convert $match from the PREG_OFFSET_CAPTURE form to the form the callback expects
        foreach ($match as &$matchItem) {
            $matchItem = $matchItem[0];
        }
        return $replacement($match);
    }

    /**
     * Strings are a pattern we need to match, in order to ignore potential
     * code-like content inside them, but we just want all of the string
     * content to remain untouched.
     *
     * This method will replace all string content with simple STRING#
     * placeholder text, so we've rid all strings from characters that may be
     * misinterpreted. Original string content will be saved in $this->extracted
     * and after doing all other minifying, we can restore the original content
     * via restoreStrings().
     *
     * @param string[optional] $chars
     * @param string[optional] $placeholderPrefix
     */
    protected function extractStrings($chars = '\'"', $placeholderPrefix = '')
    {
        // PHP only supports $this inside anonymous functions since 5.4
        $minifier = $this;
        $callback = function ($match) use ($minifier, $placeholderPrefix) {
            // check the second index here, because the first always contains a quote
            if ($match[2] === '') {
                /*
                 * Empty strings need no placeholder; they can't be confused for
                 * anything else anyway.
                 * But we still needed to match them, for the extraction routine
                 * to skip over this particular string.
                 */
                return $match[0];
            }

            $count = count($minifier->extracted);
            $placeholder = $match[1].$placeholderPrefix.$count.$match[1];
            $minifier->extracted[$placeholder] = $match[1].$match[2].$match[1];

            return $placeholder;
        };

        /*
         * The \\ messiness explained:
         * * Don't count ' or " as end-of-string if it's escaped (has backslash
         * in front of it)
         * * Unless... that backslash itself is escaped (another leading slash),
         * in which case it's no longer escaping the ' or "
         * * So there can be either no backslash, or an even number
         * * multiply all of that times 4, to account for the escaping that has
         * to be done to pass the backslash into the PHP string without it being
         * considered as escape-char (times 2) and to get it in the regex,
         * escaped (times 2)
         */
        $this->registerPattern('/(['.$chars.'])(.*?(?<!\\\\)(\\\\\\\\)*+)\\1/s', $callback);
    }

    /**
     * This method will restore all extracted data (strings, regexes) that were
     * replaced with placeholder text in extract*(). The original content was
     * saved in $this->extracted.
     *
     * @param string $content
     *
     * @return string
     */
    protected function restoreExtractedData($content)
    {
        if (!$this->extracted) {

            // nothing was extracted, nothing to restore
            return $content;
        }

        $content = strtr($content, $this->extracted);

        $this->extracted = array();

        return $content;
    }

    /**
     * Check if the path is a regular file and can be read.
     *
     * @param string $path
     *
     * @return bool
     */
    protected function canImportFile($path)
    {
        $parsed = parse_url($path);
        if (
            // file is elsewhere
            isset($parsed['host']) ||
            // file responds to queries (may change, or need to bypass cache)
            isset($parsed['query'])
        ) {
            return false;
        }

        return strlen($path) < PHP_MAXPATHLEN && @is_file($path) && is_readable($path);
    }

    /**
     * Attempts to open file specified by $path for writing.
     *
     * @param string $path The path to the file
     *
     * @return resource Specifier for the target file
     *
     * @throws IOException
     */
    protected function openFileForWriting($path)
    {
        if ($path === '' || ($handler = @fopen($path, 'w')) === false) {
            throw new IOException('The file "'.$path.'" could not be opened for writing. Check if PHP has enough permissions.');
        }

        return $handler;
    }

    /**
     * Attempts to write $content to the file specified by $handler. $path is used for printing exceptions.
     *
     * @param resource $handler The resource to write to
     * @param string   $content The content to write
     * @param string   $path    The path to the file (for exception printing only)
     *
     * @throws IOException
     */
    protected function writeToFile($handler, $content, $path = '')
    {
        if (
            !is_resource($handler) ||
            ($result = @fwrite($handler, $content)) === false ||
            ($result < strlen($content))
        ) {
            throw new IOException('The file "'.$path.'" could not be written to. Check your disk space and file permissions.');
        }
    }
}


1			<?php
2			/**
3			* Abstract minifier class
4			*
5			* Please report bugs on https://github.com/matthiasmullie/minify/issues
6			*
7			* @author Matthias Mullie <[email protected]>
8			* @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved
9			* @license MIT License
10			*/
11			namespace MatthiasMullie\Minify;
12
13			use MatthiasMullie\Minify\Exceptions\IOException;
14			use Psr\Cache\CacheItemInterface;
15
16			/**
17			* Abstract minifier class.
18			*
19			* Please report bugs on https://github.com/matthiasmullie/minify/issues
20			*
21			* @package Minify
22			* @author Matthias Mullie <[email protected]>
23			* @copyright Copyright (c) 2012, Matthias Mullie. All rights reserved
24			* @license MIT License
25			*/
26			abstract class Minify
27			{
28			/**
29			* The data to be minified.
30			*
31			* @var string[]
32			*/
33			protected $data = array();
34
35			/**
36			* Array of patterns to match.
37			*
38			* @var string[]
39			*/
40			protected $patterns = array();
41
42			/**
43			* This array will hold content of strings and regular expressions that have
44			* been extracted from the JS source code, so we can reliably match "code",
45			* without having to worry about potential "code-like" characters inside.
46			*
47			* @var string[]
48			*/
49			public $extracted = array();
50
51			/**
52			* Init the minify class - optionally, code may be passed along already.
53			*/
54			public function __construct(/* $data = null, ... */)
55			{
56			// it's possible to add the source through the constructor as well ;)
57			if (func_num_args()) {
58			call_user_func_array(array($this, 'add'), func_get_args());
59			}
60			}
61
62			/**
63			* Add a file or straight-up code to be minified.
64			*
65			* @param string\|string[] $data
66			*
67			* @return static
68			*/
69			public function add($data /* $data = null, ... */)
70			{
71			// bogus "usage" of parameter $data: scrutinizer warns this variable is
72			// not used (we're using func_get_args instead to support overloading),
73			// but it still needs to be defined because it makes no sense to have
74			// this function without argument :)
75			$args = array($data) + func_get_args();
76
77			// this method can be overloaded
78			foreach ($args as $data) {
79			if (is_array($data)) {
80			call_user_func_array(array($this, 'add'), $data);
81			continue;
82			}
83
84			// redefine var
85			$data = (string) $data;
86
87			// load data
88			$value = $this->load($data);
89			$key = ($data != $value) ? $data : count($this->data);
90
91			// replace CR linefeeds etc.
92			// @see https://github.com/matthiasmullie/minify/pull/139
93			$value = str_replace(array("\r\n", "\r"), "\n", $value);
94
95			// store data
96			$this->data[$key] = $value;
97			}
98
99			return $this;
100			}
101
102			/**
103			* Add a file to be minified.
104			*
105			* @param string\|string[] $data
106			*
107			* @return static
108			*
109			* @throws IOException
110			*/
111			public function addFile($data /* $data = null, ... */)
112			{
113			// bogus "usage" of parameter $data: scrutinizer warns this variable is
114			// not used (we're using func_get_args instead to support overloading),
115			// but it still needs to be defined because it makes no sense to have
116			// this function without argument :)
117			$args = array($data) + func_get_args();
118
119			// this method can be overloaded
120			foreach ($args as $path) {
121			if (is_array($path)) {
122			call_user_func_array(array($this, 'addFile'), $path);
123			continue;
124			}
125
126			// redefine var
127			$path = (string) $path;
128
129			// check if we can read the file
130			if (!$this->canImportFile($path)) {
131			throw new IOException('The file "'.$path.'" could not be opened for reading. Check if PHP has enough permissions.');
132			}
133
134			$this->add($path);
135			}
136
137			return $this;
138			}
139
140			/**
141			* Add data with path and content without doing any check.
142			*
143			* @param string $path File path to be minified.
144			* @param string $content Content to be minified.
145			*
146			* @return static
147			*/
148			public function addData( $path, $content ) {
149			$this->data[ $path ] = $content;
150
151			return $this;
152			}
153
154			/**
155			* Minify the data & (optionally) saves it to a file.
156			*
157			* @param string[optional] $path Path to write the data to
158			*
159			* @return string The minified data
160			*/
161			public function minify($path = null)
162			{
163			$content = $this->execute($path);
164
165			// save to path
166			if ($path !== null) {
167			$this->save($content, $path);
168			}
169
170			return $content;
171			}
172
173			/**
174			* Minify & gzip the data & (optionally) saves it to a file.
175			*
176			* @param string[optional] $path Path to write the data to
177			* @param int[optional] $level Compression level, from 0 to 9
178			*
179			* @return string The minified & gzipped data
180			*/
181			public function gzip($path = null, $level = 9)
182			{
183			$content = $this->execute($path);
184			$content = gzencode($content, $level, FORCE_GZIP);
185
186			// save to path
187			if ($path !== null) {
188			$this->save($content, $path);
189			}
190
191			return $content;
192			}
193
194			/**
195			* Minify the data & write it to a CacheItemInterface object.
196			*
197			* @param CacheItemInterface $item Cache item to write the data to
198			*
199			* @return CacheItemInterface Cache item with the minifier data
200			*/
201			public function cache(CacheItemInterface $item)
202			{
203			$content = $this->execute();
204			$item->set($content);
205
206			return $item;
207			}
208
209			/**
210			* Minify the data.
211			*
212			* @param string[optional] $path Path to write the data to
213			*
214			* @return string The minified data
215			*/
216			abstract public function execute($path = null);
217
218			/**
219			* Load data.
220			*
221			* @param string $data Either a path to a file or the content itself
222			*
223			* @return string
224			*/
225			protected function load($data)
226			{
227			// check if the data is a file
228			if ($this->canImportFile($data)) {
229			$data = file_get_contents($data);
230
231			// strip BOM, if any
232			if (substr($data, 0, 3) == "\xef\xbb\xbf") {
233			$data = substr($data, 3);
234			}
235			}
236
237			return $data;
238			}
239
240			/**
241			* Save to file.
242			*
243			* @param string $content The minified data
244			* @param string $path The path to save the minified data to
245			*
246			* @throws IOException
247			*/
248			protected function save($content, $path)
249			{
250			$handler = $this->openFileForWriting($path);
251
252			$this->writeToFile($handler, $content);
253
254			@fclose($handler);
			0 ignored issues – show Security Best Practice introduced 2015-12-17 21:43 UTC by Report Bug Copy Issue Report It seems like you do not handle an error condition here. This can introduce security issues, and is generally not recommended. If you suppress an error, we recommend checking for the error condition explicitly: // For example instead of @mkdir($dir); // Better use if (@mkdir($dir) === false) { throw new \RuntimeException('The directory '.$dir.' could not be created.'); } Loading history...
255			}
256
257			/**
258			* Register a pattern to execute against the source content.
259			*
260			* If $replacement is a string, it must be plain text. Placeholders like $1 or \2 don't work.
261			* If you need that functionality, use a callback instead.
262			*
263			* @param string $pattern PCRE pattern
264			* @param string\|callable $replacement Replacement value for matched pattern
265			*/
266			protected function registerPattern($pattern, $replacement = '')
267			{
268			// study the pattern, we'll execute it more than once
269			$pattern .= 'S';
270
271			$this->patterns[] = array($pattern, $replacement);
272			}
273
274			/**
275			* We can't "just" run some regular expressions against JavaScript: it's a
276			* complex language. E.g. having an occurrence of // xyz would be a comment,
277			* unless it's used within a string. Of you could have something that looks
278			* like a 'string', but inside a comment.
279			* The only way to accurately replace these pieces is to traverse the JS one
280			* character at a time and try to find whatever starts first.
281			*
282			* @param string $content The content to replace patterns in
283			*
284			* @return string The (manipulated) content
285			*/
286			protected function replace($content)
287			{
288			$contentLength = strlen($content);
289			$output = '';
290			$processedOffset = 0;
291			$positions = array_fill(0, count($this->patterns), -1);
292			$matches = array();
293
294			while ($processedOffset < $contentLength) {
295			// find first match for all patterns
296			foreach ($this->patterns as $i => $pattern) {
297			list($pattern, $replacement) = $pattern;
298
299			// we can safely ignore patterns for positions we've unset earlier,
300			// because we know these won't show up anymore
301			if (array_key_exists($i, $positions) == false) {
			0 ignored issues – show Coding Style Best Practice introduced 2018-11-26 23:11 UTC by Report Bug Copy Issue Report It seems like you are loosely comparing two booleans. Considering using the strict comparison `===` instead. When comparing two booleans, it is generally considered safer to use the strict comparison operator. Loading history...
302			continue;
303			}
304
305			// no need to re-run matches that are still in the part of the
306			// content that hasn't been processed
307			if ($positions[$i] >= $processedOffset) {
308			continue;
309			}
310
311			$match = null;
312			if (preg_match($pattern, $content, $match, PREG_OFFSET_CAPTURE, $processedOffset)) {
313			$matches[$i] = $match;
314
315			// we'll store the match position as well; that way, we
316			// don't have to redo all preg_matches after changing only
317			// the first (we'll still know where those others are)
318			$positions[$i] = $match[0][1];
319			} else {
320			// if the pattern couldn't be matched, there's no point in
321			// executing it again in later runs on this same content;
322			// ignore this one until we reach end of content
323			unset($matches[$i], $positions[$i]);
324			}
325			}
326
327			// no more matches to find: everything's been processed, break out
328			if (!$matches) {
			0 ignored issues – show Bug Best Practice introduced 2015-12-17 21:43 UTC by Report Bug Copy Issue Report The expression `$matches` of type `array` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
329			// output the remaining content
330			$output .= substr($content, $processedOffset);
331			break;
332			}
333
334			// see which of the patterns actually found the first thing (we'll
335			// only want to execute that one, since we're unsure if what the
336			// other found was not inside what the first found)
337			$matchOffset = min($positions);
338			$firstPattern = array_search($matchOffset, $positions);
339			$match = $matches[$firstPattern];
340
341			// execute the pattern that matches earliest in the content string
342			list(, $replacement) = $this->patterns[$firstPattern];
343
344			// add the part of the input between $processedOffset and the first match;
345			// that content wasn't matched by anything
346			$output .= substr($content, $processedOffset, $matchOffset - $processedOffset);
347			// add the replacement for the match
348			$output .= $this->executeReplacement($replacement, $match);
349			// advance $processedOffset past the match
350			$processedOffset = $matchOffset + strlen($match[0][0]);
351			}
352
353			return $output;
354			}
355
356			/**
357			* If $replacement is a callback, execute it, passing in the match data.
358			* If it's a string, just pass it through.
359			*
360			* @param string\|callable $replacement Replacement value
361			* @param array $match Match data, in PREG_OFFSET_CAPTURE form
362			*
363			* @return string
364			*/
365			protected function executeReplacement($replacement, $match)
366			{
367			if (!is_callable($replacement)) {
368			return $replacement;
369			}
370			// convert $match from the PREG_OFFSET_CAPTURE form to the form the callback expects
371			foreach ($match as &$matchItem) {
372			$matchItem = $matchItem[0];
373			}
374			return $replacement($match);
375			}
376
377			/**
378			* Strings are a pattern we need to match, in order to ignore potential
379			* code-like content inside them, but we just want all of the string
380			* content to remain untouched.
381			*
382			* This method will replace all string content with simple STRING#
383			* placeholder text, so we've rid all strings from characters that may be
384			* misinterpreted. Original string content will be saved in $this->extracted
385			* and after doing all other minifying, we can restore the original content
386			* via restoreStrings().
387			*
388			* @param string[optional] $chars
389			* @param string[optional] $placeholderPrefix
390			*/
391			protected function extractStrings($chars = '\'"', $placeholderPrefix = '')
392			{
393			// PHP only supports $this inside anonymous functions since 5.4
394			$minifier = $this;
395			$callback = function ($match) use ($minifier, $placeholderPrefix) {
396			// check the second index here, because the first always contains a quote
397			if ($match[2] === '') {
398			/*
399			* Empty strings need no placeholder; they can't be confused for
400			* anything else anyway.
401			* But we still needed to match them, for the extraction routine
402			* to skip over this particular string.
403			*/
404			return $match[0];
405			}
406
407			$count = count($minifier->extracted);
408			$placeholder = $match[1].$placeholderPrefix.$count.$match[1];
409			$minifier->extracted[$placeholder] = $match[1].$match[2].$match[1];
410
411			return $placeholder;
412			};
413
414			/*
415			* The \\ messiness explained:
416			* * Don't count ' or " as end-of-string if it's escaped (has backslash
417			* in front of it)
418			* * Unless... that backslash itself is escaped (another leading slash),
419			* in which case it's no longer escaping the ' or "
420			* * So there can be either no backslash, or an even number
421			* * multiply all of that times 4, to account for the escaping that has
422			* to be done to pass the backslash into the PHP string without it being
423			* considered as escape-char (times 2) and to get it in the regex,
424			* escaped (times 2)
425			*/
426			$this->registerPattern('/(['.$chars.'])(.?(?<!\\\\)(\\\\\\\\)+)\\1/s', $callback);
427			}
428
429			/**
430			* This method will restore all extracted data (strings, regexes) that were
431			* replaced with placeholder text in extract*(). The original content was
432			* saved in $this->extracted.
433			*
434			* @param string $content
435			*
436			* @return string
437			*/
438			protected function restoreExtractedData($content)
439			{
440			if (!$this->extracted) {
			0 ignored issues – show Bug Best Practice introduced 2015-12-17 21:43 UTC by Report Bug Copy Issue Report The expression `$this->extracted` of type `string[]` is implicitly converted to a boolean; are you sure this is intended? If so, consider using `empty($expr)` instead to make it clear that you intend to check for an array without elements. This check marks implicit conversions of arrays to boolean values in a comparison. While in PHP an empty array is considered to be equal (but not identical) to false, this is not always apparent. Consider making the comparison explicit by using `empty(..)` or `! empty(...)` instead. Loading history...
441			// nothing was extracted, nothing to restore
442			return $content;
443			}
444
445			$content = strtr($content, $this->extracted);
446
447			$this->extracted = array();
448
449			return $content;
450			}
451
452			/**
453			* Check if the path is a regular file and can be read.
454			*
455			* @param string $path
456			*
457			* @return bool
458			*/
459			protected function canImportFile($path)
460			{
461			$parsed = parse_url($path);
462			if (
463			// file is elsewhere
464			isset($parsed['host']) \|\|
465			// file responds to queries (may change, or need to bypass cache)
466			isset($parsed['query'])
467			) {
468			return false;
469			}
470
471			return strlen($path) < PHP_MAXPATHLEN && @is_file($path) && is_readable($path);
472			}
473
474			/**
475			* Attempts to open file specified by $path for writing.
476			*
477			* @param string $path The path to the file
478			*
479			* @return resource Specifier for the target file
480			*
481			* @throws IOException
482			*/
483			protected function openFileForWriting($path)
484			{
485			if ($path === '' \|\| ($handler = @fopen($path, 'w')) === false) {
486			throw new IOException('The file "'.$path.'" could not be opened for writing. Check if PHP has enough permissions.');
487			}
488
489			return $handler;
490			}
491
492			/**
493			* Attempts to write $content to the file specified by $handler. $path is used for printing exceptions.
494			*
495			* @param resource $handler The resource to write to
496			* @param string $content The content to write
497			* @param string $path The path to the file (for exception printing only)
498			*
499			* @throws IOException
500			*/
501			protected function writeToFile($handler, $content, $path = '')
502			{
503			if (
504			!is_resource($handler) \|\|
505			($result = @fwrite($handler, $content)) === false \|\|
506			($result < strlen($content))
507			) {
508			throw new IOException('The file "'.$path.'" could not be written to. Check your disk space and file permissions.');
509			}
510			}
511			}
512

matthiasmullie / minify

Pull Request — master (#359)

Minify::restoreExtractedData() A

Complexity

Size

Duplication

Importance

Duplication Side-by-Side

Filter issues like