phpQueryObject::runQuery PHP Méthode

    protected function runQuery($XQuery, $selector = null, $compare = null)
    {
        if ($compare && !method_exists($this, $compare)) {
            return false;
        }
        $stack = array();
        if (!$this->elements) {
            $this->debug('Stack empty, skipping...');
        }
        //		var_dump($this->elements[0]->nodeType);
        // element, document
        foreach ($this->stack(array(1, 9, 13)) as $k => $stackNode) {
            $detachAfter = false;
            // to work on detached nodes we need temporary place them somewhere
            // thats because context xpath queries sucks ;]
            $testNode = $stackNode;
            while ($testNode) {
                if (!$testNode->parentNode && !$this->isRoot($testNode)) {
                    $this->root->appendChild($testNode);
                    $detachAfter = $testNode;
                    break;
                }
                $testNode = isset($testNode->parentNode) ? $testNode->parentNode : null;
            }
            // XXX tmp ?
            $xpath = $this->documentWrapper->isXHTML ? $this->getNodeXpath($stackNode, 'html') : $this->getNodeXpath($stackNode);
            // FIXME pseudoclasses-only query, support XML
            $query = $XQuery == '//' && $xpath == '/html[1]' ? '//*' : $xpath . $XQuery;
            $this->debug("XPATH: {$query}");
            // run query, get elements
            $nodes = $this->xpath->query($query);
            $this->debug('QUERY FETCHED');
            if (!$nodes->length) {
                $this->debug('Nothing found');
            }
            $debug = array();
            foreach ($nodes as $node) {
                $matched = false;
                if ($compare) {
                    phpQuery::$debug ? $this->debug('Found: ' . $this->whois($node) . ", comparing with {$compare}()") : null;
                    $phpQueryDebug = phpQuery::$debug;
                    phpQuery::$debug = false;
                    // TODO ??? use phpQuery::callbackRun()
                    if (call_user_func_array(array($this, $compare), array($selector, $node))) {
                        $matched = true;
                    }
                    phpQuery::$debug = $phpQueryDebug;
                } else {
                    $matched = true;
                }
                if ($matched) {
                    if (phpQuery::$debug) {
                        $debug[] = $this->whois($node);
                    }
                    $stack[] = $node;
                }
            }
            if (phpQuery::$debug) {
                $this->debug('Matched ' . count($debug) . ': ' . implode(', ', $debug));
            }
            if ($detachAfter) {
                $this->root->removeChild($detachAfter);
            }
        }
        $this->elements = $stack;
    }