php如何将xml转为字符串

function xmlToArray($xml){ if (file_exists($xml)) { libxml_disable_entity_loader(false); $xml_string = simplexml_load_file($xml,'SimpleXMLElement', LIBXML_NOCDATA); }else{ libxml_disable_entity_loader(true); $xml_string = simplexml_load_string($xml,'SimpleXMLElement', LIBXML_NOCDATA); } $result = json_decode(json_encode($xml_string),true); return $result; }

function array2xml($arr){ $str=""; foreach ($arr as $key=>$value){ $str.= "<$key>$value"; } $str.=""; return $str; }