ajax POST json对象给PHP，PHP如何接收值
前端：
$("#save_config_btn").click(function(){ $.ajaxSetup({ cache:false, contentType : "application/x-www-form-urlencoded; charset=utf-8" }); var fields = $("#rss_form").serializeArray(); fields = JSON.stringify(fields) //中文会乱码 $.ajax({ type: "POST", url : "edit.php", data: fields, success: function(msg){ alert(msg); } }); });PHP：
<?phpheader("Content-type: text/html; charset=UTF-8");$data = $_POST['data'];echo '<pre class="brush:php;toolbar:false">';print_r($data);?>通过 JSON.stringify 获取到的json格式如下：
[{ "name":"Bill" , "value":"Gates" },{ "name":"George" , "value":"Bush" },{ "name":"Thomas" , "value":"Carter" }]PHP，这里POST的接收值不知道用什么，如果把上面的json字符串改成如下格式，那么PHP即可接受到并直接返回数组格式
{"data":[{ "name":"Bill" , "value":"Gates" },{ "name":"George" , "value":"Bush" },{ "name":"Thomas" , "value":"Carter" }]}总结下主要想问两个问题：
1、JQuery如何把serializeArray()获取到的json对象转换为 第二种格式的json字符串 且保证中文不会乱码
2、或者php如何直接接收 json对象 或者 第一种格式的 json字符串
回复讨论(解决方案)
1、JQuery如何把serializeArray()获取到的json对象转换为 第二种格式的json字符串 且保证中文不会乱码
保证不乱码，需要在header加入
第二种数组格式
var fields = $("#rss_form").serializeArray();
var t = {};
t['data'] = fields
fields = JSON.stringify(t);
2、或者php如何直接接收 json对象 或者 第一种格式的 json字符串
用第一种json字符串提交例子：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <meta http-equiv="content-type" content="text/html;charset=utf-8"> <script src="//code.jquery.com/jquery-1.11.0.min.js"></script> <title> js test </title> </head> <body> <script type="text/javascript"> var fields = [{ "name":"中文" , "value":"中文" },{ "name":"中文" , "value":"中文" },{ "name":"中文" , "value":"中文" }]; fields = "data=" + JSON.stringify(fields); $.ajax({ type: "POST", url : "demo.php", data: fields, success: function(msg){ alert(msg); } }); </script> </body></html>demo.php
<?php$data = $_POST['data'];file_put_contents('test.log', $data, true);echo "ok";?>运行后：
test.log内容为[{"name":"中文","value":"中文"},{"name":"中文","value":"中文"},{"name":"中文","value":"中文"}]
如果没有加 则会乱码。
1、ajax 本身就是以 utf-8 编码传输，所以不需要再有 charset=utf-8 声明
2、jq 的 post 方式已经发了 application/x-www-form-urlencoded 头，也不需要你再劳动了
所以
$.ajaxSetup({ cache:false, contentType : "application/x-www-form-urlencoded; charset=utf-8" }); $.ajax({ cache: false, type: "POST",3、JSON.stringify 是 json2.js 类库提供的，不属于 jq 的范畴。所以 jq 并不需要使用他来加工数据
况且 JSON.stringify 将对象（数组）转换成了 json 格式串，用它发送时，服务端还需解码
4、为了便于说明问题，我做了一个测试例
php 端 jq_server.php
<xmp><?phpecho $s = print_r($_POST, 1);var_dump('is utf-8 ?', mb_check_encoding($s, 'utf-8'));<script src=scripts/jquery-1.11.0.min.js></script><script src=scripts/json2.js></script><script>$(function() { $("#save_config_btn").click(function(){ var fields = $("#rss_form").serializeArray(); fields = JSON.stringify(fields); $.ajax({ cache: false, type: "POST", url : "jq_server.php", data: {data : fields}, //注意这里的写法 success: function(msg){ alert(msg); } }); });});</script><form id='rss_form'><input type=text name='比尔' value='大门'></br><input type=text name='乔治' value='布什'></br><input type=text name='托马斯' value='卡特'></br><input type=button id=save_config_btn value='ok'></form>去掉 fields = JSON.stringify(fields); 后
把 var fields = $("#rss_form").serializeArray();
改为 var fields = $("#rss_form").serialize();
把 data: {data : fields},
还原成 data: fields,
既然你是在学习 jquery 的 ajax 的使用，那么就该多做一些测试
太感谢了，非常感谢两位的解答
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