无法使用AJAX向PHP字符串发送值

Question

What is the actual deal in the Data part ?

<form id="form" name="form">
<input type="text" name="textname" id="textname">
<input type="button" name="submit" id="submit" onclick="post();">
</form>

function post()
{
  var textname = $('#textname').val();

    $.ajax
    ({
      url: 'post.php',
      data: {testurl:textname},
      type: "POST",
      success: function (data)
        {
          $('#test').html(data);
          console.log(data);
        }
      });
  }

And the post.php

<?php
      echo "test";

      $testurl = $_POST['textname'];

      echo var_dump($testurl); 
?>

Echo Test is working but Output for the var_dumb is NULL string(0) - Empty String

Answer 1

Try to understand one simple thing, in ajax call the data parameter contains the

key : value

pair in it.

Means if your data part is some thing like:

data: {
   var1 : val1,
   var2 : val2,
}

than in your php function you can get these values using its keys i.e. var1, var2.