_GET(3) 1 _GET(3)
$_GET - HTTP GET variables
An associative array of variables passed to the current script via the URL parameters.
$HTTP_GET_VARS contains the same initial information, but is not a superglobal. (Note that $HTTP_GET_VARS and $_GET are different variables
and that PHP handles them as such)
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
| 4.1.0 | |
| | |
| | Introduced $_GET that deprecated $HTTP_GET_VARS. |
| | |
+--------+---------------------------------------------------+
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 GET variables are passed through urldecode(3).
Handling external variables, The filter extension.
PHP Documentation Group _GET(3)
Check Out this Related Man Page
SUPERGLOBALS(3) 1 SUPERGLOBALS(3)Superglobals - Superglobals are built-in variables that are always available in all scopes
Several predefined variables in PHP are "superglobals", which means they are available in all scopes throughout a script. There is no need
to do global $variable; to access them within functions or methods.
These superglobal variables are:
o$GLOBALS
o$_SERVER
o$_GET
o$_POST
o$_FILES
o$_COOKIE
o$_SESSION
o$_REQUEST
o$_ENV
+--------+---------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------+
| 4.1.0 | |
| | |
| | Superglobals were introduced to PHP. |
| | |
+--------+---------------------------------------+
Note
Variable availability
By default, all of the superglobals are available but there are directives that affect this availability. For further information,
refer to the documentation for variables_order.
Note
Dealing with register_globals
If the deprecated register_globals directive is set to on then the variables within will also be made available in the global scope
of the script. For example, $_POST['foo'] would also exist as $foo.
For related information, see the FAQ titled "How does register_globals affect me?"
Note
Variable variables
Superglobals cannot be used as variable variables inside functions or class methods.
variable scope, The variables_order directive, The filter extension.
PHP Documentation Group SUPERGLOBALS(3)
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