PHP Get Path

PHP Gets the current page URL path

#測试网址:     http://localhost/blog/testurl.php?id=5//Get domain name or host address echo $_server[' http_host ']. ""; #localhost//Get web address echo $_server[' php_self ']. ""; #/blog/testurl.php//Get URL number echo $_server["Query_string"]. ""; #id = 5//Get user agent echo $_server[' Http_referer ']. "";  Get the full Urlecho ' http://'. $_server[' http_host '].$_server[' request_uri '];echo '/http '. $_server[' Http_host '].$_ server[' php_self ']. '?
'. $_server[' query_string '; #http://localhost/blog/testurl.php?id=5//Includes the full Urlecho '/http ' of the port number. $_server[' Server_Name ']. ': '. $_server["Server_port"].$_server["Request_uri"]; #http://localhost:80/blog/testurl.php?
Id=5//Only take path $url= '/http '. $_server[' server_name '].$_server["Request_uri"]; echo dirname ($url); #http://localhost/blog

PHP gets the absolute path to the current file

<?
PHP   echo __file__;//Get the absolute address of the current file, result: D:\www\test.php   echo dirname (__file__);//Get the Absolute folder where the current file is located, Result: D:\www\   

Usage tips,
DirName (__file__) takes the absolute path to the current file, that is, the relative path. The search speed is the fastest.

Let's say that you can move the folder up one level over and over again:
For example: $d = DirName (dirname (__file__));
The fact is to take a folder to DirName () to do a number of references. Because DirName () returns the last folder without \ \ or Yes/
So when used repeatedly can feel dirname () to the bottom of the folder as a file name to deal with. Return as usual
The parent folder of the current folder. This way, you get the folder on the top level of it again and again.

Include files that get the upper level folder
Include (DirName (__file__). ' /.. /filename.php ');
__file__ path is the file where the current code resides
DirName (DirName (__file__)); Get the file on the top of the folder name
DirName (__file__); Gets the file's layer folder name

PHP Get Path