$_GET

$_GET — HTTP GET 变量

说明

通过 URL 参数（又叫 query string）传递给当前脚本的变量的数组。注意：该数组不仅仅对 method 为 GET 的请求生效，而是会针对所有带 query string 的请求。

示例

示例 #1 $_GET 范例

<?php
echo 'Hello ' . htmlspecialchars($_GET["name"]) . '!';
?>

假设用户访问的是 http://example.com/?name=Hannes

以上示例的输出类似于：

Hello Hannes!

注释

注意:
“Superglobal”也称为自动化的全局变量。这就表示其在脚本的所有作用域中都是可用的。不需要在函数或方法中用 global $variable; 来访问它。

注意:
GET 是通过 urldecode() 传递的。

参见

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User Contributed Notes 2 notes

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CleverUser123 ¶

2 years ago


If you're tired of typing $var = $_GET['var'] to get variables, don't forget that you can also use:

extract($_GET, EXTR_PREFIX_ALL, "g")

So if you have $_GET['under'], you can do $g_under. It's way shorter if you have more get elements! If you don't want prefix, do

extract($_GET)

to get normal. So $_GET['under'] would become $under. Might not extract under if it already exists, however.

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An Anonymous User ¶

3 years ago


<?php
// It is important to sanitize
// input! Otherwise, a bad actor
// could enter '<script src="evilscript.js"></script>'
// in a URL parameter. Assuming you echo it, this
// would inject scripts in an XSS attack.
//
// The solution:
$NAME = $_GET['NAME'];
// Bad:
echo $NAME;
// that one is vulnerable to XSS
// Good:
echo htmlspecialchars($NAME);
// Sanitizes input thoroughly.
?>

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