What is the difference between php://input and $_POST in php_PHP tutorial

 　　我们先来看两个实例

　　例子：php://input

 代码如下

 

 
 
 
 

代码如下

　　post.php

 代码如下

  echo file_get_contents("php://input");?>

代码如下
echo file_get_contents("php://input");?>

　　例子，post

　　html

 代码如下

Enter your name:
Enter your age:

代码如下
Enter your name: Enter your age:

　　welcome.php

代码如下
Welcome . You are years old!

Variables sent via HTTP POST will not appear in the URL.

When we cannot receive the information from the page using $_POST, we can use php://input to receive the value. So what is the difference between the two?

First, $HTTP_RAW_POST_DATA is empty when $_POST and php://input can get values;

　$http_raw_post_data is a global variable built into PHP. It is used by PHP to fill the POST data into the variable $http_raw_post_data as it is when the Content-Type cannot be recognized. It also cannot read POST data whose Content-Type is multipart/form-data. You need to set the always_populate_raw_post_data value in php.ini to On so that PHP will always fill in the POST data into the variable $http_raw_post_data.

Then $_POST organizes the submitted data in an associative array and performs encoding processing, such as urldecode, or even encoding conversion;

And php://input obtains the unprocessed POST original data through file reading through the input stream;

　php://input allows reading the raw data of POST. It puts less pressure on memory than $HTTP_RAW_POST_DATA and does not require any special php.ini settings. php://input cannot be used with enctype=”multipart/form-data”;

　php://input cannot read $_GET data. This is because the $_GET data is written in the PATH field of the http request header as query_path, rather than in the body part of the http request.

http://www.bkjia.com/PHPjc/730226.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/730226.htmlTechArticleLet’s first look at two practical examples: php://input The code is as follows form action=post.php method= post input type=text name=user input type=password name=password input type=submit /form p...