php 如何发送xml报文

   POST <URL> HTTP/1.0　　USER-Agent: <Client Application Name>　　Content-Type: application/x-fox　　Content-Length: nnnn　　　　<?xml version=”1.0”?>　　<?FOX FOXHEADER=”100” VERSION=”100” SECURITY=”NONE” LANG=CHS?>　　<FOX>　　...　　</FOX>

<?phpif( $_SERVER['REQUEST_METHOD'] === 'POST' ){    // 接收    $content = file_get_contents('php://input');    $xml = simplexml_load_string($content);    echo "来自XML接收方的响应\n";    print_r( get_object_vars($xml) );    exit;}// 发送行为$xml = <<<xml<?xml version="1.0"?><FOX><hello>world</hello></FOX>xml;$setting = array(    'http' => array(    'method' => 'POST',    'user_agent' => '<Client Application Name>',    'header' => "Content-type: application/x-www-form-urlencoded",    'content' => $xml    ));$context = stream_context_create($setting);$url = 'http://localhost/'. $_SERVER['REQUEST_URI'];$response = file_get_contents($url, null, $context);echo $response;