Summary of usage of several predefined variables of php $_ SERVER

This article summarizes the use of several php predefined variables, $_ SERVER. Share it for your reference. The details are as follows:

<?php

echo 'documentroot:'.$_SERVER['DOCUMENT_ROOT'].'<br>'; // Root directory , In apache Define in the configuration file of: httpd.conf  For example: DocumentRoot "D:/work/php_root"

echo 'httphost:'.$_SERVER['HTTP_HOST'].'<br>'; 　 // Domain names, such as: localhost

echo 'phpself:'.$_SERVER['PHP_SELF'].'<br>';   //  The path from the root directory to the file itself 

echo 'script filename'.$_SERVER['SCRIPT_FILENAME'].'<br>'; 　 //documentroot+phpself

echo 'request uri'.$_SERVER['REQUEST_URI'].'<br>'; 　 // All URL strings starting from the root directory, including the characters after the question mark 

echo 'request method:'.$_SERVER['REQUEST_METHOD'].'<br>'; 　 // Requested method 

echo 'name:'.$_REQUEST['name'].'<br>'; 　 // The value of the request parameter 

?>

I hope this article is helpful to everyone's PHP programming.