将javascript变量传递给php代码？

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问题描述

我有一个php和javascript代码文件。我想将一个php变量设置为javascript函数的结果，该函数将php变量作为参数。例如：

I have a file of php and javascript code. I want to set a php variable to be the result of a javascript function which takes a php variable as a parameter. For example:

$parameter = "this is a php variable";
$phpVar = echo "foo(" . parameter . ");";

我知道你不能做= echo，还有另外一种方法吗？

I know you cannot do a "= echo", is there another way I can do this?

谢谢

推荐答案

你不能直接这样做，因为JavaScript在客户端运行，PHP在服务器端执行。

You can't directly do that, since JavaScript runs on the client-side and PHP gets executed on the server-side.

您需要先执行JavaScript，然后通过FORM将结果发送到服务器或者AJAX调用。

You would need to execute the JavaScript first and then send the result to the server via a FORM or AJAX call.

这可能是这样的：

PHP

$parameter = "this is a php variable";
echo "var myval = foo(" . parameter . ");";

JavaScript

var myval = foo("this is a php variable"); // generated by PHP

$.ajax({
  type: 'POST',
  url: 'yourphpfile.php',
  data: {'variable': myval},
});

接收PHP（yourphpfile.php）

Receiving PHP (yourphpfile.php)

$myval = $_POST['variable'];
// do something

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