checkImages.php

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<?php
require_once __DIR__ . '/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;