checkImages.php

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<?php
require_once( dirname( __FILE__ ) . '/Maintenance.php' );

class CheckImages extends Maintenance {

        public function __construct() {
                parent::__construct();
                $this->mDescription = "Check images to see if they exist, are readable, etc";
                $this->setBatchSize( 1000 );
        }

        public function execute() {
                $start = '';
                $dbr = wfGetDB( DB_SLAVE );

                $numImages = 0;
                $numGood = 0;

                do {
                        $res = $dbr->select( 'image', '*', array( 'img_name > ' . $dbr->addQuotes( $start ) ),
                                __METHOD__, array( 'LIMIT' => $this->mBatchSize ) );
                        foreach ( $res as $row ) {
                                $numImages++;
                                $start = $row->img_name;
                                $file = RepoGroup::singleton()->getLocalRepo()->newFileFromRow( $row );
                                $path = $file->getPath();
                                if ( !$path ) {
                                        $this->output( "{$row->img_name}: not locally accessible\n" );
                                        continue;
                                }
                                wfSuppressWarnings();
                                $stat = stat( $file->getPath() );
                                wfRestoreWarnings();
                                if ( !$stat ) {
                                        $this->output( "{$row->img_name}: missing\n" );
                                        continue;
                                }

                                if ( $stat['mode'] & 040000 ) {
                                        $this->output( "{$row->img_name}: is a directory\n" );
                                        continue;
                                }

                                if ( $stat['size'] == 0 && $row->img_size != 0 ) {
                                        $this->output( "{$row->img_name}: truncated, was {$row->img_size}\n" );
                                        continue;
                                }

                                if ( $stat['size'] != $row->img_size ) {
                                        $this->output( "{$row->img_name}: size mismatch DB={$row->img_size}, actual={$stat['size']}\n" );
                                        continue;
                                }

                                $numGood++;
                        }

                } while ( $res->numRows() );

                $this->output( "Good images: $numGood/$numImages\n" );
        }
}

$maintClass = "CheckImages";
require_once( RUN_MAINTENANCE_IF_MAIN );