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, [ $this, 'showProgress' ] );
        if ( !$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;