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CodeCleanerGlobalsPass.php
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CodeCleanerGlobalsPass.php
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<?php
/**
* Psy CodeCleaner to allow PHP super globals.
*
* https://github.com/bobthecow/psysh/issues/353
*
* Copyright © 2017 Justin Hileman <justin@justinhileman.info>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Maintenance
*
* @author Justin Hileman <justin@justinhileman.info>
*/
/**
* Prefix the real command with a 'global $VAR, $VAR2, ...;' command, where $VAR etc.
* are the current global variables. This will make the shell behave as if it was running
* in the global scope (almost; variables created in the shell won't become global if no
* global variable by that name existed before) so debugging MediaWikis globals-based
* configuration settings is less cumbersome, and behavior is closer to that of eval.php.
*/
class CodeCleanerGlobalsPass extends \Psy\CodeCleaner\CodeCleanerPass {
private const SUPERGLOBALS = [
'GLOBALS', '_SERVER', '_ENV', '_FILES', '_COOKIE', '_POST', '_GET', '_SESSION'
];
public function beforeTraverse( array $nodes ) {
$globalVars = array_diff( array_keys( $GLOBALS ), self::SUPERGLOBALS );
$validGlobalVars = array_filter( $globalVars, static function ( string $name ) {
// https://www.php.net/manual/en/language.variables.basics.php
return preg_match( '/^[a-zA-Z_\x80-\xff][a-zA-Z0-9_\x80-\xff]*$/', $name );
} );
if ( $validGlobalVars ) {
$globalCommand = new \PhpParser\Node\Stmt\Global_( array_map( static function ( string $name ) {
return new \PhpParser\Node\Expr\Variable( $name );
}, $validGlobalVars ) );
array_unshift( $nodes, $globalCommand );
}
return $nodes;
}
}

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