[solved]how to generate the alias using the api

	$doc = $modx->newObject('modDocument');
	$data = array(
		'pagetitle'   	=> $title,         // $title="Joé, the slow one !"
		'alias'   	=> $title          // how to create the alias ? "joe-the-slow-one"
	);

$title = 'Title of the document';
makeAlias($title);
function makeAlias($url){

		$url	= no_accent($url);
		$url	= ereg_replace("[^a-z A-Z0-9-]*","",$url);
		$url	= ereg_replace("-{2,}","-",$url);
		$url	= ereg_replace(' ','-',$url);
		$url	= trim(strtolower($url));
		$url	= ltrim($url,'-');
		$url	= rtrim($url,'-');
		return $url;
}
function no_accent($filename) {
		$str = strtr(utf8_decode($filename),utf8_decode("ÀÁÂÃÄÅÇÑñÇçÈÉÊËÌÍÎÏÒÓÔÕÖØÙÚÛÜÝàáâãäåçèéêëìíîïðòóôõöøùúûüýÿ' "),
										   "AAAAAACNnCcEEEEIIIIOOOOOOUUUUYaaaaaaceeeeiiiiooooooouuuuyy--" );
		return $str;
	}