javascript：

<script>/*@desc 加载XHR文件@author lee [<complet@163.com>]@param file 文件路径@param async 同步或异步 true 异步 flase 同步@return xmlDoc 加载后的内容*/function loadDoc(file,async=true){if(window.XMLHttpRequest){ // code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest();}else{ // code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP");}if(async === true){ xmlhttp.onreadystatechange = function(){ if(xmlhttp.readyState < 4){ // 加载中 }else if (xmlhttp.readyState == 4 && xmlhttp.status == 200){ // 成功 var xmlDoc if(xmlhttp.getResponseHeader('content-type')==='application/json'){ xmlDoc = JSON.parse(xmlhttp.responseText); }else{ xmlDoc = xmlhttp.responseText } return xmlDoc }else{ // 失败 xmlhttp.abort() return } }}xmlhttp.open("POST",file,async);xmlhttp.setRequestHeader("Content-type", "application/json");var data = {name:"lee"}var str = JSON.stringify(data)xmlhttp.send(str);if(async === false){ var xmlDoc if(xmlhttp.getResponseHeader('content-type')==='application/json'){ xmlDoc = JSON.parse(xmlhttp.responseText); }else{ xmlDoc = xmlhttp.responseText } return xmlDoc}}var str = loadDoc('test.php',false)console.log(str.name)</script>php：

<?phpheader("content-type:application/json");$json = file_get_contents('php://input');echo $json;