$_REQUEST

$_REQUEST — HTTP Request 变量

说明

默认情况下包含了 $_GET ， $_POST 和 $_COOKIE 的数组。

更新日志

版本	说明
5.3.0	引入 request_order。该指令会影响 `$_REQUEST` 的内容。
4.3.0	`$_FILES` 信息被从 `$_REQUEST` 中移除。
4.1.0	引入 `$_REQUEST` 。

注释

Note:

“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。

Note:

以命令行方式运行时，将不包含 argv 和 argc 信息；它们将存在于 $_SERVER 数组。

Note:

由于 $_REQUEST 中的变量通过 GET，POST 和 COOKIE 输入机制传递给脚本文件，因此可以被远程用户篡改而并不可信。这个数组的项目及其顺序依赖于 PHP 的 variables_order 指令的配置。

参见

import_request_variables() - 将 GET／POST／Cookie 变量导入到全局作用域中
处理外部变量
过滤器扩展

用户评论:

[#1] mike o. [2010-03-11 16:31:13]

The default php.ini on your system as of in PHP 5.3.0 may exclude cookies from $_REQUEST. The request_order ini directive specifies what goes in the $_REQUEST array; if that does not exist, then the variables_order directive does. Your distribution's php.ini may exclude cookies by default, so beware.

[#2] John Galt [2009-12-06 17:36:34]

I wrote a function because I found it inconvenient if I needed to change a particular parameter (get) while preserving the others. For example, I want to make a hyperlink on a web page with the URL http://www.example.com/script.php?id=1&blah=blah+blah&page=1 and change the value of "page" to 2 without getting rid of the other parameters.

<?php function add_or_change_parameter($parameter, $value) { $params = array(); $output = "?"; $firstRun = true; foreach($_GET as $key=>$val) { if($key != $parameter) { if(!$firstRun) { $output .= "&"; } else { $firstRun = false; } $output .= $key."=".urlencode($val); } } if(!$firstRun) $output .= "&"; $output .= $parameter."=".urlencode($value); return htmlentities($output); } ?>

Now, I can add a hyperlink to the page (http://www.example.com/script.php?id=1&blah=blah+blah&page=1) like this:
<a href="<?php echo add_or_change_parameter("page", "2"); ?>">Click to go to page 2</a>

The above code will output
<a href="?id=1&blah=blah+blah&page=2">Click to go to page 2</a>

Also, if I was setting "page" to a string rather than just "2", the value would be urlencode()'d.
<a href="<?php echo add_or_change_parameter("page", "banana+split!"); ?>">Click to go to page banana split!</a>
would become
<a href="?id=1&blah=blah+blah&page=banana+split%21">Click to go to page banana split!</a>

[EDIT BY danbrown AT php DOT net: Contains a bugfix provided by (theogony AT gmail DOT com), which adds missing `echo` instructions to the HREF tags.]

[#3] strata_ranger at hotmail dot com [2008-07-17 08:04:22]

Don't forget, because $_REQUEST is a different variable than $_GET and $_POST, it is treated as such in PHP -- modifying $_GET or $_POST elements at runtime will not affect the ellements in $_REQUEST, nor vice versa.

e.g:

<?php $_GET['foo'] = 'a'; $_POST['bar'] = 'b'; var_dump($_GET); // Element 'foo' is string(1) "a" var_dump($_POST); // Element 'bar' is string(1) "b" var_dump($_REQUEST); // Does not contain elements 'foo' or 'bar' ?>

If you want to evaluate $_GET and $_POST variables by a single token without including $_COOKIE in the mix, use $_SERVER['REQUEST_METHOD'] to identify the method used and set up a switch block accordingly, e.g:

<?php switch($_SERVER['REQUEST_METHOD']) { case 'GET': $the_request = &$_GET; break; case 'POST': $the_request = &$_POST; break; . . // Etc. . default: } ?>