How to get form content in php-PHP Tutorial-php.cn

How to get form content in php

一个新手

Release： 2023-03-15 20:44:01

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1: Briefly introduce how to obtain it

#When php accepts information submitted through an HTML form, it will save the submitted data in a global array , we can call the system-specific automatic global variable array to obtain these values.

Two: Commonly used automatic global variables are:

$_GET;
$_POST;
$_REQUEST
其中前两个是经常用的。
他们是通过：from标签中的method 里面传的方式  如果是get就用$_GET属性  如果是post就用 $_POST;
例子：
<form method="post" action="index.php">帐号：<input type = "text" name=login><br>
</form>
echo("你的帐号是：" . $_POST[&#39;login&#39;]);  
这里我们用的post方式传输的所以就要用$_POST;

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Three: Not much to say Example:

## html code:

<html>
<head>  
<meta http-equiv="Content-Type" content="text/html; charset=utf8">  
</head> 
<body>  
<form action="send_simpleForm.php" method="POST">name:<input type="text" name="username"><br>
<select name="products[]" size=6 multiple> 
<option value="c++">c++</option> 
<option value="c#">c#</option>
  <option value="php">php</option>
<option value="Python">Python</option> 
<option value="lua">lua</option>
  <option value="JavaScript">JavaScript</option> 
</select><br />
  Message:<br>
 <textarea name="message" rows="5" cols="40">
</textarea><br> 
<input type="submit" value="ok">  
</form>  
</body>
</html>

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php code:

<?php  
  
header("Content-Type: text/html; charset=UTF-8");  
  
if (isset($_POST["username"]))  
{  
    echo "输入的名户名为：" . $_POST["username"] . "<br>";  
}  
  
if (isset($_POST["products"]))  
{  
    if (is_array($_POST["products"]) && !empty($_POST["products"]))  
    {  
        echo "选择的科目为：" . "<br>";  
        foreach ($_POST["products"] as  $value ) {  
            echo  "$value <br />";  
        }  
        echo "选择的个数为：" . count($_POST["products"]) . "<br>";  
    }  
}  
  
if (isset($_POST["message"]))  
{  
    echo "输入的消息为：" . $_POST["message"] . "<br>";  
}  
  
//表单如果以POST提交，那么获取内容是就用$_POST["control_name"];  
//表单如果以GET提交，那么获取内容就用$_GET["control_name"];  
    
 ?>

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Four: Summary:

PHP gets the summary of each value in the form :Form submission method
1. GET method
Function: Get the data submitted by get method
Format:
$_GET[“formelement”]
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2. POST method Function: Get the data submitted by post method
Format:
$_POST[“formelement”]
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3. REQUEST method Function: Get any Data submitted via method
Format:
$_REQUEST[“formelement”]
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复选框、列表框（名称采用数组形式如:"select[]",在获取其值的时候直接使用$_POST["select"]即可）
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