ajax +json 传递不过去文本框输入的参数，求大神指教 后台的参数能传回
TEST< /title></p><p><script type="text/javascript" src="js/echarts.js"></script>; </p><p><脚本类型=“text/javascript”src=“js/jquery-2.1.4.js”></script> </p><p></head></p><p><body></p><p> <input type="text" id="username"></p><p> <;输入类型 =“文本” id =“密码”></p><p> <按钮 id =“子”>查询</按钮></p><p> <span id =“文本”> ;</span></p><p> <div id="main" style="height:400px"></div></p><p><脚本类型=“text/javascript”></p><p>$(document).ready(function(){</p><p> $("#sub"). on("click",function(){</p><p> var myChart = echarts.init(document.getElementById('main'));</p><p> var arr1=[],arr2=[]; </p><p> 函数 arrTest(){</p><p> var 用户名=$('#username').val(); </p><p> var 密码=$('#password').val (); $.ajax({</p><p> 类型:"post",<br/></p> 异步:false,<p></p> url:"json.php", <p></p> 结果:{用户名:用户名,密码:密码}, <p></p> dataType:"json",<p></p> success:function(结果){ <p></p> if (结果) {<p></p> for (var i = 0; i < result.length; i++) {<p></p> arr1.push(result[i] .name);<p></p> arr2.push(result[i].age);<p></p> }<p></p> }<p></p> }<p></p> } )<p></p> return arr1,arr2;<p></p> }<p></p> arrTest();<p></p> var option = {<p></p> 工具提示: {<p></p> 显示：true<p></p> },<p></p> 图例：{<p></p> 数据：['年龄']<p></p> },<p></p> x 轴：[<p><p> {</p><p> type : '类别',</p><p> 数据: arr1</p><p> }</p><p> ],</p><p> y 轴 : [</p><p> {</p><p> type : 'value'</p><p> }</p><p> ],</p><p> 系列：[</p><p> {</p><p> “姓名”：“年龄”，</p><p> “类型”：“栏”，</p><p> “数据”：arr2</p><p> }</p><p> ]</p><p> };</p><p> myChart.setOption(选项); </p><p> });</p><p>}); </p><p> </script></p><p></body></p><p><br/></p><p><br/></p><p><br/></p><p><br/></p><p>后台</p><p>//$p = $_GET["用户名"];</p><p>$p="20180621";</p> <p>用$p = $_GET["username"]接收不到引入的数据，但是直接变量给变量$p，前端能正常收到json数据</p></div><div class='info mb-10'><a rel="nofollow" href=" http://m.php.cn/zh/member/117125.html"><img src='https://img.php.cn/upload/avatar/000/000/001/7262d103cba8bec85edd2dffced14592.jpg' alt="银浩"><span style="margin-left: 5px;">银浩</span></a><span class='pl-10'>2278 天前</span><span class='pl-10'>1198 <b class="kclbcollectb"></b></span></div></div><div class="course-list discuss layui-clear bg-white"><h3>全部回复(2)<span class="detail_answer"><span id="discuss-wenda">我来回复</span></span></h3><li class="layui-clear"><div class="discuss-img"><img src="https://img.php.cn/upload/avatar/000/000/001/028f14a81fcdabbd670033362d096d7e.jpg"
alt="无忌哥哥"></div><div class="info f-left ml-10"><p><a rel="nofollow" href="http://m.php.cn/zh/member/5656.html" fid=""
class="replyer-name">无忌哥哥</a><span>2018-06-27 09:09:56</span></p><p class="content Overflow_line">如果是用的tp5框架的话直接input('post.username');</p><span class="detail_answer2" style="float: left" fid="237847"><div class="btn wenda-second-btn" name="无忌哥哥" fid="237847">回复</div></span><i class="layui-icon layui-icon-praise wenda-praise-btn"><span>0</span></i></div></li><li class="layui-clear"><div class="discuss-img"><img src="https://img.php.cn/upload/avatar/000/000/001/ab5d28ec84900baf1a370b17a944c283.jpg"
alt="威尼斯"></div><div class="info f-left ml-10"><p><a rel="nofollow" href="http://m.php.cn/zh/member/101766.html" fid=""
class="replyer-name">威尼斯</a><span>2018-06-27 09:02:55</span></p><p class="content Overflow_line">你ajax的type不是post的吗，后台怎么会用$_GET去接收呢，用$_REQUEST,或者$_POST</p><span class="detail_answer2" style="float: left" fid="237839"><div class="btn wenda-second-btn" name="威尼斯" fid="237839">回复</div></span><i class="layui-icon layui-icon-praise wenda-praise-btn"><span>0</span></i></div></li><div class="reply-list"><div class="reply-item"><span class="pull-left comment-ops absolute"><span class="mr20"><a rel="nofollow" href="http://m.php.cn/zh/member/117125.html" target="_blank"><img src="https://img.php.cn/upload/avatar/000/000/001/7262d103cba8bec85edd2dffced14592.jpg" width="30" height="30"
alt="银浩"></a></span></span><div class="reply-content-block"><div class="reply-content Overflow_line"><p>发现问题，json的data写成result{}</p></div><div><span class="comment-meta inline-block"><span> — </span><a rel="nofollow" target="_blank" class="reply_color" href="http://m.php.cn/zh/member/117125.html"><strong>银浩</strong></a><span class="text-muted-plus"> · 2018-06-27 10:54:27</span></span></div></div></div></div><div class='more'></div></div><div class='discuss-submit bg-white'><li class='info layui-clear'><span class='f-left' id='discuss-submit-close'>取消</span><span class='f-left wenda-reply-text'>回复</span></li><li class='layui-clear'><textarea type='text' rows="6" placeholder="请输入您的评论内容" class="wenda-reply-content-text"></textarea></li><li class='layui-clear'><button class="layui-btn layui-btn-danger f-right wenda-reply-publish-button">发布</button></li></div><div class='lock-screen' id='lock-screen'></div><script src="/static/ueditor/third-party/SyntaxHighlighter/shCore.js"></script><div 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