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

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