php通過curl請求api

//post請求

function postXMLCurl($url, $xml) {    $ch = curl_init();    curl_setopt($ch, CURLOPT_POST, true);    curl_setopt($ch, CURLOPT_URL, $url);    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);    curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);    curl_setopt($ch, CURLOPT_HTTPHEADER, array(        'Content-Type: text/xml; charset=utf-8',        'Content-Length: ' . strlen($xml))    );    $response  = curl_exec($ch);    if ($response) {        curl_close($ch);        return $response;    } else {        curl_close($ch);        return false;    }}

            $response = postXMLCurl($url, $xml);            if (!$response) {                //todo                return false;            }<span style="white-space:pre"></span>            $response = simplexml_load_string($response, 'SimpleXMLElement', LIBXML_NOCDATA);            if (!is_object($response)) {                //todo                return false;            }            $result = (array)$response;            //todo

//帶認證驗證的請求function post_xml_curl($url, $xml, $cert='', $key='', $certpwd='') {    $ch = curl_init();curl_setopt($ch, CURLOPT_HTTPHEADER, array(    'Content-Type: text/xml; charset=utf-8',    'Content-Length: ' . strlen($xml)));    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 1);    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 1);    curl_setopt($ch, CURLOPT_POST, true);    curl_setopt($ch, CURLOPT_URL, $url);    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);    curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);if (isset( $cert) && isset($key) && isset($certpwd)) {curl_setopt($ch,CURLOPT_SSLCERTTYPE,'PEM');curl_setopt($ch,CURLOPT_SSLCERT,$cert);curl_setopt($ch,CURLOPT_SSLCERTPASSWD, $certpwd);curl_setopt($ch,CURLOPT_SSLKEYTYPE,'PEM');curl_setopt($ch,CURLOPT_SSLKEY,$key);}    $response  = curl_exec($ch);    curl_close($ch);    return $response;}