                        課程
                    
                        /前端開發(fā)
                        
                            /JavaScript
                        
                        /Ajax全接觸

在php中加了頭還是不管用，前臺代碼運行在node上，端口8080，apache 3000

post變成options了;chrome中報這樣的錯

XMLHttpRequest cannot load http://localhost:3000/test.php. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8080' is therefore not allowed access.

request頭

Accept:*/*

Accept-Encoding:gzip, deflate, sdch, br

Accept-Language:zh-CN,zh;q=0.8

Access-Control-Request-Headers:access-control-allow-origin, content-type

Access-Control-Request-Method:POST

Connection:keep-alive

Host:localhost:3000

Origin:http://localhost:8080

Referer:http://localhost:8080/index

下面是php

?<?php
header('Content-Type:application/json;charset=utf-8');
header('Access-Control-Allow-Origin:*');
header('Access-Control-Allow-Methods:GET,POST');
?????$backValue=$_POST['trans_data'];
?????echo?$backValue."+后臺返回";
??>

這是ajax

$.support.cors?=true;
var?my_data="前臺變量";
my_data=escape(my_data)+"";//編碼，防止?jié)h字亂碼
$.ajax({
????url:?"http://localhost:3000/test.php",
????type:?"POST",
????data:{trans_data:my_data},
????//dataType:?"jsonp",
????contentType:"application/json",
????crossDomain:true,
????error:?function(e){
????????console.log(e)
????},
????success:?function(data,status){//如果調(diào)用php成功
????????alert(unescape(data));//解碼，顯示漢字
????},
????headers:{
????????'Access-Control-Allow-Origin':'http://localhost:8080'
????}
})

求解答啊~~~