PHP gets the website root directory, and several methods for PHP to get the website root directory

stay php We want to get the website root directory You can use many global variables to realize , If you can use __file__ or DOCUMENT_ROOT Wait for variables to get , Let's take a look at some examples .

__file__

dirname(__file__) // What we got was this Soft connection Absolute directory of itself

If you want to execute in soft connection php The way to get the root directory of the website from the file is :

$dir = $_SERVER['DOCUMENT_ROOT'] ; //# Get the root directory of the document where the script is currently running .

php Get the website root directory method 1 ：

define("WWWROOT",str_ireplace(str_replace("/","＼＼",$_SERVER['PHP_SELF']),'',__FILE__)."＼＼");

echo WWWROOT ;

?>

php Method 2 of obtaining website root directory ：

define('WWW_PATH',str_replace('＼＼','/',realpath(dirname(__FILE__).'/../')));  // Define Site Directory

?>

php Method 3 to get the root directory of the website ：

$_SERVER['DOCUMENT_ROOT'] // The root directory of the document where the script is currently running . Define... In the server configuration file

Other ways to get directories :

$_SERVER['SCRIPT_FILENAME'] # The absolute pathname of the currently executing script .

$_SERVER['PATH_TRANSLATED'] # The file system of the current script ( Not the document root ) Basic path .

$_SERVER['SCRIPT_NAME'] # Contains the path of the current script . This is useful when the page needs to point to itself .

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