$header[] = "Content-type: text/xml";//定义content-type为xml        $post_data = ‘<?xml version="1.0" encoding="UTF-8"?>‘;        $post_data .= ‘<param>‘;        $post_data .= ‘<siteId>‘ . 123 . ‘</siteId>‘;        $post_data .= ‘<mtgTitle>‘ . 测试数据 . ‘</mtgTitle>‘;        $post_data .= ‘<startTime>‘ . 2016-10-30 18:08:30 . ‘</startTime>‘;        $post_data .= ‘<endTime>‘ . 2016-10-30 19:08:30 . ‘</endTime>‘;        $post_data .= ‘</param>‘;      //  dump($post_data);        /*$xml = simplexml_load_string($post_data);        dump($xml);        echo "<meta charset=\"UTF-8\">";        echo "<h3>发送</h3>";        dump($xml);*/        $url = "http://test.api.com";              $ch = curl_init();        curl_setopt($ch, CURLOPT_HTTPHEADER, $header);        curl_setopt($ch, CURLOPT_URL, $url);        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);        // post数据        curl_setopt($ch, CURLOPT_POST, 1);        // post的变量        curl_setopt($ch, CURLOPT_POSTFIELDS, $post_data);        $response = curl_exec($ch);        if (curl_errno($ch)) {            print curl_error($ch);        }        curl_close($ch);                $xml = simplexml_load_string($response);        echo "<h3>接收</h3>";        //dump($response);        dump($xml);