src/SimpleDOM.php
static public function sort(array &$nodes)
    {
        $args = func_get_args();
        unset($args[0]);

        $sort = array();
        $tmp = array();

        foreach ($args as $k => $arg) {
            if (is_string($arg)) {
                $tmp[$k] = array();

                if (preg_match('#^@?[a-z_0-9]+$#Di', $arg)) {
                    if ($arg[0] === '@') {
                        $name = substr($arg, 1);
                        foreach ($nodes as $node) {
                            $tmp[$k][] = (string)$node[$name];
                        }
                    } else {
                        foreach ($nodes as $node) {
                            $tmp[$k][] = (string)$node->$arg;
                        }
                    }
                } elseif (preg_match('#^current\\(\\)|text\\(\\)|\\.$#i', $arg)) {
                    /**
                     * If the XPath is current() or text() or . we use this node's textContent
                     */
                    foreach ($nodes as $node) {
                        $tmp[$k][] = dom_import_simplexml($node)->textContent;
                    }
                } else {
                    foreach ($nodes as $node) {
                        $_nodes = $node->xpath($arg);
                        $tmp[$k][] = (empty($_nodes)) ? '' : (string)$_nodes[0];
                    }
                }
            } else {
                $tmp[$k] = $arg;
            }

            /**
             * array_multisort() wants everything to be passed as reference so we have to cheat
             */
            $sort[] =& $tmp[$k];
        }

        $sort[] =& $nodes;

        call_user_func_array('array_multisort', $sort);
    }
static public function sort(array &$nodes)
    {
        $args = func_get_args();
        unset($args[0]);

        $sort = array();
        $tmp = array();

        foreach ($args as $k => $arg) {
            if (is_string($arg)) {
                $tmp[$k] = array();

                if (preg_match('#^@?[a-z_0-9]+$#Di', $arg)) {
                    if ($arg[0] === '@') {
                        $name = substr($arg, 1);
                        foreach ($nodes as $node) {
                            $tmp[$k][] = (string)$node[$name];
                        }
                    } else {
                        foreach ($nodes as $node) {
                            $tmp[$k][] = (string)$node->$arg;
                        }
                    }
                } elseif (preg_match('#^current\\(\\)|text\\(\\)|\\.$#i', $arg)) {
                    /**
                     * If the XPath is current() or text() or . we use this node's textContent
                     */
                    foreach ($nodes as $node) {
                        $tmp[$k][] = dom_import_simplexml($node)->textContent;
                    }
                } else {
                    foreach ($nodes as $node) {
                        $_nodes = $node->xpath($arg);
                        $tmp[$k][] = (empty($_nodes)) ? '' : (string)$_nodes[0];
                    }
                }
            } else {
                $tmp[$k] = $arg;
            }

            /**
             * array_multisort() wants everything to be passed as reference so we have to cheat
             */
            $sort[] =& $tmp[$k];
        }

        $sort[] =& $nodes;

        call_user_func_array('array_multisort', $sort);
    }
Sort an array of nodes

Note that nodes are sorted in place, nothing is returned

@see sortedXPath

@param    array &$nodes Array of SimpleXMLElement
@return    void