getText.php

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

class GetTextMaint extends Maintenance {
    public function __construct() {
        parent::__construct();
        $this->addDescription( 'Outputs page text to stdout' );
        $this->addOption( 'show-private', 'Show the text even if it\'s not available to the public' );
        $this->addArg( 'title', 'Page title' );
    }

    public function execute() {
        $titleText = $this->getArg( 0 );
        $title = Title::newFromText( $titleText );
        if ( !$title ) {
            $this->error( "$titleText is not a valid title.\n", true );
        }

        $rev = Revision::newFromTitle( $title );
        if ( !$rev ) {
            $titleText = $title->getPrefixedText();
            $this->error( "Page $titleText does not exist.\n", true );
        }
        $content = $rev->getContent( $this->hasOption( 'show-private' )
            ? Revision::RAW
            : Revision::FOR_PUBLIC );

        if ( $content === false ) {
            $titleText = $title->getPrefixedText();
            $this->error( "Couldn't extract the text from $titleText.\n", true );
        }
        $this->output( $content->serialize() );
    }
}

$maintClass = "GetTextMaint";
require_once RUN_MAINTENANCE_IF_MAIN;