maintenance/eval.php

   1 <?php
   2 /**
   3  * PHP lacks an interactive mode, but this can be very helpful when debugging.
   4  * This script lets a command-line user start up the wiki engine and then poke
   5  * about by issuing PHP commands directly.
   6  *
   7  * Unlike eg Python, you need to use a 'return' statement explicitly for the
   8  * interactive shell to print out the value of the expression. Multiple lines
   9  * are evaluated separately, so blocks need to be input without a line break.
  10  * Fatal errors such as use of undeclared functions can kill the shell.
  11  *
  12  * To get decent line editing behavior, you should compile PHP with support
  13  * for GNU readline (pass --with-readline to configure).
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License along
  26  * with this program; if not, write to the Free Software Foundation, Inc.,
  27  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  28  * http://www.gnu.org/copyleft/gpl.html
  29  *
  30  * @ingroup Maintenance
  31  */
  32
  33 require_once( "Maintenance.php" );
  34
  35 class EvalPrompt extends Maintenance {
  36
  37         public function __construct() {
  38                 parent::__construct();
  39                 $this->mDescription = "This script lets a command-line user start up the wiki engine and then poke\n" .
  40                                                                 "about by issuing PHP commands directly.";
  41                 $this->addOption( 'd', "Enable MediaWiki debug output", false, true );
  42         }
  43
  44         public function execute() {
  45                 global $wgUseNormalUser, $wgDebugFunctionEntry, $wgDebugLogFile;
  46                 $wgUseNormalUser = (bool)getenv('MW_WIKIUSER');
  47                 if ( $this->hasOption('d') ) {
  48                         $d = $this->getOption('d');
  49                         if ( $d > 0 ) {
  50                                 $wgDebugLogFile = '/dev/stdout';
  51                         }
  52                         if ( $d > 1 ) {
  53                                 $lb = wfGetLB();
  54                                 foreach ( $lb->mServers as $i => $server ) {
  55                                         $lb->mServers[$i]['flags'] |= DBO_DEBUG;
  56                                 }
  57                         }
  58                         if ( $d > 2 ) {
  59                                 $wgDebugFunctionEntry = true;
  60                         }
  61                 }
  62
  63                 if ( function_exists( 'readline_add_history' )
  64                         && function_exists( 'posix_isatty' ) && posix_isatty( 0 /*STDIN*/ ) )
  65                 {
  66                         $useReadline = true;
  67                 } else {
  68                         $useReadline = false;
  69                 }
  70
  71                 if ( $useReadline ) {
  72                         $historyFile = "{$_ENV['HOME']}/.mweval_history";
  73                         readline_read_history( $historyFile );
  74                 }
  75
  76                 while ( ( $line = readconsole( '> ' ) ) !== false ) {
  77                         if ( $useReadline ) {
  78                                 readline_add_history( $line );
  79                                 readline_write_history( $historyFile );
  80                         }
  81                         $val = eval( $line . ";" );
  82                         if( is_null( $val ) ) {
  83                                 echo "\n";
  84                         } elseif( is_string( $val ) || is_numeric( $val ) ) {
  85                                 echo "$val\n";
  86                         } else {
  87                                 var_dump( $val );
  88                         }
  89                 }
  90                 print "\n";
  91         }
  92 }
  93
  94 $maintClass = "EvalPrompt";
  95 require_once( DO_MAINTENANCE );