pruneFileCache.php

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<?php
require_once __DIR__ . '/Maintenance.php';

class PruneFileCache extends Maintenance {

    protected $minSurviveTimestamp;

    public function __construct() {
        parent::__construct();
        $this->addDescription( 'Build file cache for content pages' );
        $this->addOption( 'agedays', 'How many days old files must be in order to delete', true, true );
        $this->addOption( 'subdir', 'Prune one $wgFileCacheDirectory subdirectory name', false, true );
    }

    public function execute() {
        global $wgUseFileCache, $wgFileCacheDirectory;

        if ( !$wgUseFileCache ) {
            $this->error( "Nothing to do -- \$wgUseFileCache is disabled.", true );
        }

        $age = $this->getOption( 'agedays' );
        if ( !ctype_digit( $age ) ) {
            $this->error( "Non-integer 'age' parameter given.", true );
        }
        // Delete items with a TS older than this
        $this->minSurviveTimestamp = time() - ( 86400 * $age );

        $dir = $wgFileCacheDirectory;
        if ( !is_dir( $dir ) ) {
            $this->error( "Nothing to do -- \$wgFileCacheDirectory directory not found.", true );
        }

        $subDir = $this->getOption( 'subdir' );
        if ( $subDir !== null ) {
            if ( !is_dir( "$dir/$subDir" ) ) {
                $this->error( "The specified subdirectory `$subDir` does not exist.", true );
            }
            $this->output( "Pruning `$dir/$subDir` directory...\n" );
            $this->prune_directory( "$dir/$subDir", 'report' );
            $this->output( "Done pruning `$dir/$subDir` directory\n" );
        } else {
            $this->output( "Pruning `$dir` directory...\n" );
            // Note: don't prune things like .cdb files on the top level!
            $this->prune_directory( $dir, 'report' );
            $this->output( "Done pruning `$dir` directory\n" );
        }
    }

    protected function prune_directory( $dir, $report = false ) {
        $tsNow = time();
        $dirHandle = opendir( $dir );
        while ( false !== ( $file = readdir( $dirHandle ) ) ) {
            // Skip ".", "..", and also any dirs or files like ".svn" or ".htaccess"
            if ( $file[0] != "." ) {
                $path = $dir . '/' . $file; // absolute
                if ( is_dir( $path ) ) {
                    if ( $report === 'report' ) {
                        $this->output( "Scanning `$path`...\n" );
                    }
                    $this->prune_directory( $path );
                } else {
                    $mts = filemtime( $path );
                    // Sanity check the file extension against known cache types
                    if ( $mts < $this->minSurviveTimestamp
                        && preg_match( '/\.(?:html|cache)(?:\.gz)?$/', $file )
                        && unlink( $path )
                    ) {
                        $daysOld = round( ( $tsNow - $mts ) / 86400, 2 );
                        $this->output( "Deleted `$path` [days=$daysOld]\n" );
                    }
                }
            }
        }
        closedir( $dirHandle );
    }
}

$maintClass = "PruneFileCache";
require_once RUN_MAINTENANCE_IF_MAIN;