(PHP 4 >= 4.1.0, PHP 5, PHP 7, PHP 8)
$_GET — Query string variables
An associative array of variables passed to the current script via the URL parameters (also known as the query string). Note that this array is populated whenever a query string is present, regardless of the HTTP request method.
Example #1 $_GET example
<?php
echo 'Hello ' . htmlspecialchars($_GET["name"]) . '!';
?>
Assuming the user entered http://example.com/?name=Hannes.
The above example will output something similar to:
Hello Hannes!
Note:
This is a 'superglobal', or automatic global, variable. This simply means that it is available in all scopes throughout a script. There is no need to do global $variable; to access it within functions or methods.
Note:
The values in $_GET are automatically passed through urldecode().