Explain the predefined super global array variables of PHP arrays-PHP Tutorial-php.cn

Explain the predefined super global array variables of PHP arrays

jacklove

Release： 2023-03-30 17:30:02

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php Arrays play an important role in php. This article will explain its related contents in detail.

1)GLOBALS

2) _SERVER

Server variables, different web servers may have different contents

3) G ET gets HTTPGET Parameters passed by the HTTP POST method, such as parameters passed by the url or form GET method

4) _POST

Get parameters passed by the HTTP POST method, such as parameters passed by the form POST method

5) F ILESHTTP file upload variable

6) _COOKIE

7) S ESSION

8) _REQUEST

includes G ET, _POST and C OOKIE All content in .

9) _ENV

Environment variables are related to the environment in which PHP is running.

If there is no data, it may be related to the phpini configuration item variables_order configuration item

already A defined (existing) variable (the type of data stored is an array).

Super global: super global variable, scope (valid area)!

There are two main ways to pass data (submit data) to the server

1.get method

For example:

Parameter name=parameter value¶meter Name = parameter value...

On the server side (the requested php file), you can obtain the _GET index value as the parameter name through GET, and the data corresponding to the index value is the parameter value

2.Post method

For example, it is sent via form post!

Can be obtained through $_POST!

<?php
var_dump($_GET);
?>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>预定义超全局数据变量</title>
</head>
<body>
<form method="get">
    姓名:<input type="text" name=&#39;username&#39; /><br />
    性别:<input type="text" name=&#39;sex&#39; /><br />
    <input type="text" name=&#39;dwqdwqdqw&#39; />
    <input type="submit" value=&#39;提交&#39; />
</form>
</body>
</html>

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