TitleArray.php

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<?php
abstract class TitleArray implements Iterator {
        static function newFromResult( $res ) {
                $array = null;
                if ( !wfRunHooks( 'TitleArrayFromResult', array( &$array, $res ) ) ) {
                        return null;
                }
                if ( $array === null ) {
                        $array = self::newFromResult_internal( $res );
                }
                return $array;
        }

        protected static function newFromResult_internal( $res ) {
                $array = new TitleArrayFromResult( $res );
                return $array;
        }
}

class TitleArrayFromResult extends TitleArray {

        var $res;
        var $key, $current;

        function __construct( $res ) {
                $this->res = $res;
                $this->key = 0;
                $this->setCurrent( $this->res->current() );
        }

        protected function setCurrent( $row ) {
                if ( $row === false ) {
                        $this->current = false;
                } else {
                        $this->current = Title::newFromRow( $row );
                }
        }

        public function count() {
                return $this->res->numRows();
        }

        function current() {
                return $this->current;
        }

        function key() {
                return $this->key;
        }

        function next() {
                $row = $this->res->next();
                $this->setCurrent( $row );
                $this->key++;
        }

        function rewind() {
                $this->res->rewind();
                $this->key = 0;
                $this->setCurrent( $this->res->current() );
        }

        function valid() {
                return $this->current !== false;
        }
}