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<?php |
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/** |
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* This script lets a command-line user start up the wiki engine and then poke |
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* about by issuing PHP commands directly. |
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* |
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* Unlike eg Python, you need to use a 'return' statement explicitly for the |
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* interactive shell to print out the value of the expression. Multiple lines |
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* are evaluated separately, so blocks need to be input without a line break. |
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* Fatal errors such as use of undeclared functions can kill the shell. |
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* |
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* To get decent line editing behavior, you should compile PHP with support |
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* for GNU readline (pass --with-readline to configure). |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License along |
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* with this program; if not, write to the Free Software Foundation, Inc., |
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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* http://www.gnu.org/copyleft/gpl.html |
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* |
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* @file |
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* @ingroup Maintenance |
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*/ |
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$optionsWithArgs = [ 'd' ]; |
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/** */ |
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require_once __DIR__ . "/commandLine.inc"; |
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if ( isset( $options['d'] ) ) { |
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$d = $options['d']; |
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if ( $d > 0 ) { |
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$wgDebugLogFile = '/dev/stdout'; |
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} |
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if ( $d > 1 ) { |
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$lb = wfGetLB(); |
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$serverCount = $lb->getServerCount(); |
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for ( $i = 0; $i < $serverCount; $i++ ) { |
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$server = $lb->getServerInfo( $i ); |
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$server['flags'] |= DBO_DEBUG; |
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$lb->setServerInfo( $i, $server ); |
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} |
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} |
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} |
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$__useReadline = function_exists( 'readline_add_history' ) |
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&& Maintenance::posix_isatty( 0 /*STDIN*/ ); |
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if ( $__useReadline ) { |
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$__historyFile = isset( $_ENV['HOME'] ) ? |
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"{$_ENV['HOME']}/.mweval_history" : "$IP/maintenance/.mweval_history"; |
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readline_read_history( $__historyFile ); |
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} |
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$__e = null; // PHP exception |
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while ( ( $__line = Maintenance::readconsole() ) !== false ) { |
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if ( $__e && !preg_match( '/^(exit|die);?$/', $__line ) ) { |
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// Internal state may be corrupted or fatals may occur later due |
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// to some object not being set. Don't drop out of eval in case |
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// lines were being pasted in (which would then get dumped to the shell). |
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// Instead, just absorb the remaning commands. Let "exit" through per DWIM. |
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echo "Exception was thrown before; please restart eval.php\n"; |
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continue; |
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} |
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if ( $__useReadline ) { |
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readline_add_history( $__line ); |
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readline_write_history( $__historyFile ); |
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} |
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try { |
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$__val = eval( $__line . ";" ); |
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} catch ( Exception $__e ) { |
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echo "Caught exception " . get_class( $__e ) . |
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": {$__e->getMessage()}\n" . $__e->getTraceAsString() . "\n"; |
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continue; |
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} |
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if ( wfIsHHVM() || is_null( $__val ) ) { |
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echo "\n"; |
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} elseif ( is_string( $__val ) || is_numeric( $__val ) ) { |
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echo "$__val\n"; |
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} else { |
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var_dump( $__val ); |
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} |
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} |
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print "\n"; |
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This check looks for type mismatches where the missing type is
false
. This is usually indicative of an error condtion.Consider the follow example
This function either returns a new
DateTime
object or false, if there was an error. This is a typical pattern in PHP programming to show that an error has occurred without raising an exception. The calling code should check for this returnedfalse
before passing on the value to another function or method that may not be able to handle afalse
.