是否可以列出 PHP 中的所有全局变量？

Is it possible to List Out All the Global variables in PHP?

提问by Hemi

Is it possible to list out all the Global Variable. Such , as to print all session variable we can use print_r($_SESSION);as the same way, if i want to know how many Global variables are define in my site. is it possible? Please Help.

是否可以列出所有全局变量。例如，print_r($_SESSION);如果我想知道在我的站点中定义了多少全局变量，我们可以以相同的方式打印所有会话变量。是否可以？请帮忙。

I need the list which can show me all the Global variables List in PHP.

我需要可以显示 PHP 中所有全局变量列表的列表。

回答by Jordan Arseno

Yes, PHP $GLOBALSarray will show you.

是的，PHP$GLOBALS数组会告诉你。

<?php

echo "<pre>";
print_r($GLOBALS);
echo "</pre>";

回答by Tadeck

To get names of all global variables do this:

要获取所有全局变量的名称，请执行以下操作：

array_keys($GLOBALS)

More docs:

更多文档：

• on array_keys(): http://php.net/manual/en/function.array-keys.php
• on $GLOBALS: http://php.net/manual/en/reserved.variables.globals.php

• 关于 array_keys()：http: //php.net/manual/en/function.array-keys.php
• 在 $GLOBALS 上：http: //php.net/manual/en/reserved.variables.globals.php

回答by NullPoiиteя

$GLOBALS— References all variables available in global scope also check this PHP global or $GLOBALShere you find many important and useful thing about $GLOBALS

$GLOBALS— 引用全局范围内可用的所有变量，还可以检查这个PHP global 或 $GLOBALS在这里你会发现很多重要和有用的东西$GLOBALS

回答by hjpotter92

Well, there does exist a $GLOBALSvariable in PHP.

好吧，$GLOBALSPHP 中确实存在一个变量。

But you can't do a var_export()on it. It'll lead to an error like: Nesting level too deep - recursive dependency?

但是你不能var_export()对它做任何事情。它会导致如下错误：嵌套级别太深 - 递归依赖？

回答by FThompson

The reserved $GLOBALSvariable is an array containing all global variables.

保留$GLOBALS变量是一个包含所有全局变量的数组。

In the array, the keys are variable names and the values are variable values.

在数组中，键是变量名，值是变量值。