purgeParserCache.php

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<?php
require( __DIR__ . '/Maintenance.php' );

class PurgeParserCache extends Maintenance {
        public $lastProgress;

        function __construct() {
                parent::__construct();
                $this->addDescription( "Remove old objects from the parser cache. " .
                        "This only works when the parser cache is in an SQL database." );
                $this->addOption( 'expiredate', 'Delete objects expiring before this date.', false, true );
                $this->addOption( 'age',
                        'Delete objects created more than this many seconds ago, assuming $wgParserCacheExpireTime ' .
                                'has been consistent.',
                        false, true );
        }

        function execute() {
                $inputDate = $this->getOption( 'expiredate' );
                $inputAge = $this->getOption( 'age' );
                if ( $inputDate !== null ) {
                        $date = wfTimestamp( TS_MW, strtotime( $inputDate ) );
                } elseif ( $inputAge !== null ) {
                        global $wgParserCacheExpireTime;
                        $date = wfTimestamp( TS_MW, time() + $wgParserCacheExpireTime - intval( $inputAge ) );
                } else {
                        $this->error( "Must specify either --expiredate or --age", 1 );
                }

                $english = Language::factory( 'en' );
                $this->output( "Deleting objects expiring before " . $english->timeanddate( $date ) . "\n" );

                $pc = wfGetParserCacheStorage();
                $success = $pc->deleteObjectsExpiringBefore( $date, array( $this, 'showProgress' ) );
                if ( !$success ) {
                        $this->error( "\nCannot purge this kind of parser cache.", 1 );
                }
                $this->showProgress( 100 );
                $this->output( "\nDone\n" );
        }

        function showProgress( $percent ) {
                $percentString = sprintf( "%.2f", $percent );
                if ( $percentString === $this->lastProgress ) {
                        return;
                }
                $this->lastProgress = $percentString;

                $stars = floor( $percent / 2 );
                $this->output( '[' . str_repeat( '*', $stars ) . str_repeat( '.', 50 - $stars ) . '] ' .
                        "$percentString%\r" );

        }
}
$maintClass = 'PurgeParserCache';
require_once( RUN_MAINTENANCE_IF_MAIN );