客户端实现：
<?phpheader("Content-Type:text/html;charset=utf8");session_start();$_SESSION["username"] = "骚男";$_SESSION["userage"] = "25";$session_name = $_SESSION["username"];$session_age = $_SESSION["userage"];?><body> ???<div id="msg"></div></body><script src="jquery.js" type="text/javascript"></script><script> ???function test() { ???????$.ajax({ ???????????//提交数据的类型 POST GET ???????????type: "POST", ???????????//提交的网址 ???????????url: "http://www.test.me/ajax/server.php", ???????????//提交的数据 ?????????????data: { ???????????????Name: "<?php echo $session_name; ?>", ???????????????Age: "<?php echo $session_age; ?>", ???????????}, ???????????//返回数据的格式 ?????????????datatype: "html", //"xml", "html", "script", "json", "jsonp", "text". ?????????????//成功返回之后调用的函数 ??????????????????????????success: function(data) { ???????????????$("#msg").html(decodeURI(data)); ???????????}, ???????????//调用出错执行的函数 ?????????????error: function() { ???????????????//请求出错处理 ?????????????????alert(‘0‘); ???????????} ???????}); ???} ???test();</script>服务端实现：
<?phpheader(‘Access-Control-Allow-Origin: *‘);header(‘Access-Control-Allow-Headers: Origin, X-Requested-With, Content-Type, Accept‘);//主要为跨域CORS配置的两大基本信息,Origin和headerssession_start();$_SESSION["username"] = $_POST[‘Name‘];var_dump($_SESSION["username"]);?>
ajax 跨域前后端实现
原文地址：https://www.cnblogs.com/blts/p/9212577.html