我知道类似的问题都来了几次，但我似乎无法找到一个会帮助我想做的事情。

I realise similar questions have come up a few times, but I can't seem to find one that will help with what I am trying to do.

我们有一个config.php文件基本上是变量列表，用户组，以及它们的值，例如：

We have a config.php file which is basically a list of variables that a user sets, along with their values, eg:

$OUR_EMAIL_ADDRESS = 'test@test.com';
$OUR_WEBSITE       = 'www.test.com';

就像所有我们想通过JavaScript传递PHP的值的其他用户。

Just like all the other users we want to transfer a PHP value via Javascript.

我们已经这样做了的方式，通过AJAX - 但它不是那么灵活，因为我们想为每个变量需要自定义脚本/ PHP页面：

We have a way of doing this already, via ajax - but it is not as flexible as we would like as each variable needs a custom script / php page:

第1部分 - 的JavaScript（jQuery的）

$.get("/getConfig_email.php", function(email){
    alert(email);
});

第2部分：getConfig_email.php

<?php
echo $OUR_EMAIL_ADDRESS_VALUE;
?>

的问题：

有没有办法PHP可以使用一个字符串作为一个变量名？ IE浏览器。我想要做的是这样的：

Is there a way that PHP can use a string as a variable name? ie. What I want to do is this:

第1部分 - 的JavaScript（jQuery的）

$.get("/getConfig.php?name=OUR_EMAIL_ADDRESS_VALUE", function(email){
    alert(email);
});

第2部分：getConfig.php

<?php
$var_name = $_GET['name'];

//some magic here to turn the name of the variable 
//in to the actual variable - a bit like a reverse extract

echo $var_name.value;
?>

你怎么看？这是可能以某种方式 - 我希望也只是一个PHP命令，可以为我做到这一点！

What do you think? Is this possible somehow - I'm hoping there is just a php command that can do this for me!

在预先感谢。

推荐答案

是的，这是可以通过的 可变变量 ：

Yes, it is possible via variable variables:

echo $$var_name;

然而，这是不明智的，因为你正在服用的用户输入，并可能用户可以得到内部变量，都应该被隐藏的值。

However, this is unwise since you are taking user input and possibly the user can get values of internal variables that are supposed to be hidden.