php处理Ajax，post提交JSON.stringify的数据？

Question

php输出的数据
var_dump($_POST);

array(16) { ["title"]=> string(35) "你好吗" ["company"]=> string(6) "你好" ["headmaster"]=> string(1) "3" ["Dheadmaster"]=> string(1) "3" ["years"]=> string(4) "2022" ["classroomtype"]=> string(1) "5" ["kzcd"]=> string(3) "127" ["select"]=> string(14) "30,31,32,33,34" ["rank"]=> string(0) "" ["stime"]=> string(0) "" ["etime"]=> string(0) "" ["scorestime"]=> string(0) "" ["scoreetime"]=> string(0) "" ["tabletimesel"]=> string(0) "" ["filestime"]=> string(0) "" ["fileetime"]=> string(0) "" }

JS

 var d = {};
      var t = $('form').serializeArray();
      var data = $('form').serialize();

      $.each(t, function() {
        d[this.name] = this.value;
      });
      console.log(JSON.stringify(d));
      var qwe = JSON.stringify(d);

      $.ajax({
           dataType: "json",
           url: 'classroomupdate.php?t=update&cd=<?php echo $_GET['id']?>',
           type:'post', 
           data:qwe, 


{"title":"你好吗","company":"你好","headmaster":"3","Dheadmaster":"3","years":"2022","classroomtype":"5","kzcd":"127","select":"30,31,32,33,34","rank":"","stime":"","etime":"","scorestime":"","scoreetime":"","tabletimesel":"","filestime":"","fileetime":""}

PHP 怎样获取键对应的值？

Answer 1

<?php
//$_POST 是一个数组
$title = $_POST['title'];
$company =  $_POST['company'];
// ... ...是这个意思吗？
echo "title is $title; company is $company";
?>