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What is the usage of $_REQUEST in php
- 青灯夜游Original
- 2022-02-10 17:12:255375browse
In php, the predefined variable "$_REQUEST" can be used to obtain the data submitted by the form through POST or GET, and can also be used to obtain COOKIE information; it is an array, including "$ _GET", "$_POST" and "$_COOKIE".
The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer
php predefined variable $_REQUEST
In the actual development process, when we don’t know which way the form submits data, how do we get the data?
PHP provides a $_REQUEST global variable, which is an array containing $_POST, $_GET and $_COOKIE. The array structure is similar to $_POST and $_GET.
That is to say, whether the data is submitted using POST or GET, you can use $_REQUEST to obtain it, and you can even use $_REQUEST to obtain COOKIE information. The request_order attribute was introduced in PHP5.3. We can control the content contained in $_REQUEST by modifying the value of the request_order attribute in the php.ini configuration file.
The value of the request_order attribute can be the three uppercase English letters G, P and C, which represent GET, POST and COOKIE respectively. By default, the default value of the request_order attribute is request_order="GP", which does not include C, which means that $_REQUEST does not contain COOKIE information. If we want $_REQUEST to contain COOKIE, we need to modify it to request_order="GPC".
Example:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>表单提交</title>
</head>
<body>
<p>------------------------get------------------------</p>
<form action="index.php" method="get">
姓名：<input type="text" name="name" placeholder="请输入姓名"><br>
性别：<input type="radio" name="sex" value="男">男
<input type="radio" name="sex" value="女">女<br>
爱好：<input type="checkbox" name="hobby[]" value="read">阅读
<input type="checkbox" name="hobby[]" value="travel">旅游
<input type="checkbox" name="hobby[]" value="sport">运动
<input type="checkbox" name="hobby[]" value="internet">上网<br>
职业：<select name="job">
<option value="coder">程序员</option>
<option value="teacher">教师</option>
<option value="doctor">医生</option>
<option value="other">其它</option>
</select><br>
<input type="submit" value="提交">  <input type="reset" value="重置">
</form>
<p>------------------------post------------------------</p>
<form action="index.php" method="post">
姓名：<input type="text" name="name" placeholder="请输入姓名"><br>
性别：<input type="radio" name="sex" value="男">男
<input type="radio" name="sex" value="女">女<br>
爱好：<input type="checkbox" name="hobby[]" value="read">阅读
<input type="checkbox" name="hobby[]" value="travel">旅游
<input type="checkbox" name="hobby[]" value="sport">运动
<input type="checkbox" name="hobby[]" value="internet">上网<br>
职业：<select name="job">
<option value="coder">程序员</option>
<option value="teacher">教师</option>
<option value="doctor">医生</option>
<option value="other">其它</option>
</select><br>
<input type="submit" value="提交">  <input type="reset" value="重置">
</form>
</body>
</html>
<?php
if(!empty($_REQUEST)){
echo '提交成功！<br><pre class="brush:php;toolbar:false">';
var_dump($_REQUEST);
}
?>Run the above code, no matter which submission method is selected, you can successfully receive the information passed by the form using $_REQUEST.
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