PHP Gets the current host, domain name, path, port and other parameter code sharing

Source: Internet
Author: User
This article mainly and we introduce how PHP obtains the current host, domain name, url, path, port and other parameters, with a certain reference value, interested can understand, hope to help everyone.

Lab Environment:

Test the domain name Daxiangtravel.com,apache root directory/mnt/, test the directory/mnt/qa/test, the test file is named index.php.

Get the code:

Get current directory:

  GETCWD ();///mnt/qa/testdirname (__file__);///mnt/qa/test

Get domain name or host address

$_server[' Http_host ']; Daxiangtravel.com

Get web Address

$_server[' php_self '];///qa/test/index.php

Get URL parameters

$_server["Query_string"];//v=433 get user agent $_server[' http_referer '];//http://daxiangtravel.com/qa/test/index.php?v=433

Get the full URL

' http://' $_server[' http_host '].$_server[' Request_uri '];//http://daxiangtravel.com/qa/test/index.php?v=433 ' http://'. $_server[' http_host '].$_server[' php_self ']. $_server[' query_string '];//http://daxiangtravel.com/qa/test/index.php?v=433

Fetch path only

$url = ' http://' $_server[' server_name '].$_server["Request_uri"];echo dirname ($url);//Http://daxiangtravel.com/qa/test

Full URL with port number

' http://'. ' $_server[' server_name '. $_server["Server_port"].$_server["Request_uri"];///http/ daxiangtravel.com:80/qa/test/index.php?v=433
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