fetchText.php

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

class FetchText extends Maintenance {
        public function __construct() {
                parent::__construct();
                $this->mDescription = "Fetch the revision text from an old_id";
        }

         public function execute() {
                $db = wfGetDB( DB_SLAVE );
                $stdin = $this->getStdin();
                while ( !feof( $stdin ) ) {
                        $line = fgets( $stdin );
                        if ( $line === false ) {
                                // We appear to have lost contact...
                                break;
                        }
                        $textId = intval( $line );
                        $text = $this->doGetText( $db, $textId );
                        if ($text === false) {
                                # actual error, not zero-length text
                                $textLen = "-1";
                        }
                        else {
                                $textLen = strlen($text);
                        }
                        $this->output( $textId . "\n" . $textLen . "\n" . $text );
                }
        }

        private function doGetText( $db, $id ) {
                $id = intval( $id );
                $row = $db->selectRow( 'text',
                        array( 'old_text', 'old_flags' ),
                        array( 'old_id' => $id ),
                        __METHOD__ );
                $text = Revision::getRevisionText( $row );
                if ( $text === false ) {
                        return false;
                }
                return $text;
        }
}

$maintClass = "FetchText";
require_once( RUN_MAINTENANCE_IF_MAIN );