如何使用Ajax调用将变量从PHP传递到Javascript

I read this post and assumed the technique in the answer would work with ajax calls. I have my ajax and php code below but it does not work.The client does not recognize the 'passed' variable. I do not know why nor how to remedy this.

我读了这篇文章并假设答案中的技术可以使用ajax调用。我有我的ajax和PHP代码，但它不起作用。客户端无法识别'传递'变量。我不知道为什么也不知道如何解决这个问题。

Javascript

使用Javascript

var irrelevant = 'irrelevant';

   $('body').click(function(){


            $.ajax({
            type: 'POST',
            url: 'test.php',
            data: {mydata: irrelevant},    
            success: function(){

            console.log('worky');

            alert(myvar); // NOT worky!

                    }

            });

    });

PHP File

PHP文件

<?php


$thing = 10;


?>


<script>

var myvar = "<?php echo $thing; ?>";

</script>

2 个解决方案

#1

try this in your ajax.success

在你的ajax.success中试试这个

success: function(data){
   console.log('worky');
   alert(data); // It should now, worky!
}

and in you php

在你的PHP

<?php

   echo 10;

?>

#2

try this in php

在php中尝试这个

<?php  $thing = 10; ?>


<script>

var myvar = "<?php echo $thing; ?>";

</script>

javascript

JavaScript的

$('body').click(function(){

            $.ajax({
            type: 'POST',
            url: 'test.php',
            data: {mydata: irrelevant},    
            success: function(data){
                $("#hiddendiv").html(data);
                alert(myvar);
            }
       });  
});

#1