maintenance/CodeCleanerGlobalsPass.inc

   1 <?php
   2 /**
   3  * Psy CodeCleaner to allow PHP super globals.
   4  *
   5  * https://github.com/bobthecow/psysh/issues/353
   6  *
   7  * Copyright © 2017 Justin Hileman <justin@justinhileman.info>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License along
  20  * with this program; if not, write to the Free Software Foundation, Inc.,
  21  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  22  * http://www.gnu.org/copyleft/gpl.html
  23  *
  24  * @file
  25  * @ingroup Maintenance
  26  *
  27  * @author Justin Hileman <justin@justinhileman.info>
  28  */
  29
  30 /**
  31  * Prefix the real command with a bunch of 'global $VAR;' commands, one for each global.
  32  * This will make the shell behave as if it was running in the global scope (almost;
  33  * variables created in the shell won't become global if no global variable by that name
  34  * existed before).
  35  */
  36 class CodeCleanerGlobalsPass extends \Psy\CodeCleaner\CodeCleanerPass {
  37         private static $superglobals = [
  38                 'GLOBALS', '_SERVER', '_ENV', '_FILES', '_COOKIE', '_POST', '_GET', '_SESSION'
  39         ];
  40
  41         public function beforeTraverse( array $nodes ) {
  42                 $names = [];
  43                 foreach ( array_diff( array_keys( $GLOBALS ), self::$superglobals ) as $name ) {
  44                         array_push( $names, new \PhpParser\Node\Expr\Variable( $name ) );
  45                 }
  46
  47                 array_unshift( $nodes, new \PhpParser\Node\Stmt\Global_( $names ) );
  48
  49                 return $nodes;
  50         }
  51 }