Three ways to get post data from PHP

Method One, $_post

$_post or $_request stores the data in PHP in the form of a key=>value format.

The $_post method is an array of variables passed through the HTTP POST method, which is an automatic global variable. If you use $_post[' name '] You can receive the Web form and the Web page asynchronously POST data, that is, $_post can only receive document type content-type:application/ X-www-form-urlencoded the submitted data.

Method two, using file_get_contents ("Php://input")

For post data that does not specify Content-type, you can use File_get_contents ("Php://input") to get the raw data. In fact, this method is used for any data received by the post in PHP. Without considering Content-type, including binary file streams is also possible.

Compared to $http_raw_post_data, it brings less pressure to memory and does not require any special php.ini settings.

Php://input cannot read the post data content-type is multipart/form-data, you need to set the Always_populate_raw_post_data value in php.ini to ON.

The php://input cannot read $_get data. This is because the $_get data is written as Query_path in the Path field of the HTTP request header (header) instead of the body part of the HTTP request.

For example, the user uses a (client application) (JSON) post to the server for a file, the contents of which we do not care about, but we want to keep this file intact on the server, we can use the following code:

　　

Method Three, use global variable $globals[' http_raw_post_data ']

The $globals[' Http_raw_post_data ' store is the raw data that is sent to the POST.

But whether or not to save the POST data in $globals[' Http_raw_post_data '] depends on the settings of Centent-type, only if PHP is in an unrecognized content-type case. The POST data will be filled in the variable $globals[' http_raw_post_data '] as it is, and the variable is empty like content-type=application/x-www-form-urlencoded.

In addition, it is also unable to read the post data of Content-type to Multipart/form-data, but also to set the Always_populate_raw_post_data value in php.ini to ON, PHP will always fill in the post data into the variable $http_raw_post_data.

The following is a small example that demonstrates $_post, $GLOBALS [' Http_raw_post_data '] and php://input receive POST data processing in three different ways:

A.html

<form name= "Demo_form" action= "post.php" method= "POST" >     <p><label>name: </label>< Input type= "text" class= "input" name= "name" ></p>     <p><label>address: </label>< Input type= "text" class= "input" name= "address" ></p>     

post.php

<?phpheader ("Content-type:text/html;charset=utf-8");  Echo ' $_post receives:<br/> '; Print_r ($_post); Echo ' 
　　
Three ways to get post data from PHP