会话变量未在javascript代码中更新 [英] Session variable does not get updated within javascript code

问题描述

delete_define.php具有以下代码段:

delete_define.php has the following code snippet:

<?php
    session_start();
?>

<form action="delete_now.php" target="upload_target"  onsubmit="return my_func_1();">
    <input type="submit" name="my_submit" class="my_submit" value="submit"/>
    <iframe id="upload_target" name="upload_target" src1111="#" style="width:0;height:0;border:0px solid #fff;"></iframe>
</form>

<script type="text/javascript">
    function my_func_1(){
       //alert("from within my_func() =" +<?php echo $_SESSION['my_session'];  ?>);
       alert(" my_func_1");
       return true;
    }

    function my_func_2(){
       alert("my_func_2 =" +<?php echo $_SESSION['my_session'];  ?>);
       return true;
    }
</script>

delete_now.php具有:

delete_now.php has:

<?php
    session_start();
    $_SESSION['my_session']=rand();
?>

<script type="text/javascript">   
    alert("from within delete_now.php = " +<?php echo $_SESSION['my_session'];  ?>);
    window.top.window.my_func_2();
</script>

问题是my_func_2()不能为会话变量提供与delete_now.php中的警报框相同的输出.

The problem is my_func_2() does not give the same output for the session variable as the alert box in delete_now.php gives.

那是为什么?

EDIT: CHANGED THE CODE SAID TO BE IN delete_define.php

推荐答案

这是因为在delete_define.php加载时，会话var是一个，然后变成另一个，但是在JS中，您存储了以前的值.

That's because when the delete_define.php was loading the Session var was one, then it's become another, but in you JS stored previous value.

您应该将会话var存储到JS var中，然后在JS中的delete_now.php中使用新值将其重置.

You should store session var into JS var, and then in JS in delete_now.php reset it with the fresh value.

如何从框架和其他情况下刷新价值

将类似以下内容的内容添加到第一个php文件的JS中:

Add to first php file's JS something like:

var session_var = '<?php echo $_SESSION['my_session']; ?>';

然后在您的delete_now.php的JS中:

And then in your delete_now.php's JS:

parent.session_var = '<?php echo $_SESSION['my_session']; ?>';

然后更改函数my_func来提醒session_var JS变量.

And change function my_func to alert session_var JS variable.

这样想...

说明:

然后结果页js将是:

function my_func_2(){
   alert("my_func_2 = 13513513513513");
   return true;
}

因此，当您调用它时，$ _ SESSION中的任何内容都会有旧的静态值.

So when you call it, whatever is in the $_SESSION is, there will be old, static value.

总体过程说明:

1. 加载delete_define.php
2. JavaScript var，包含已初始化的实际文件名
3. 来自提交
4. 脚本delete_now.php正在运行
5. 主窗口中的Javascript变量刷新
6. 您调用my_func_2()，它将使用包含新文件名的全局JS var.

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