This article mainly introduces how PHP obtains the current host, domain name, URL, path, port and other parameters. It has certain reference value. If you are interested, you can learn more. I hope it can help everyone.
Experimental environment:
Test domain name daxiangtravel.com, apache root directory/mnt/, test directory/mnt/qa/test, test file name is index.php.
Get the code:
Get the current directory:
getcwd(); // /mnt/qa/test dirname(__FILE__); // /mnt/qa/test
Get the domain name or host address
$_SERVER['HTTP_HOST']; //daxiangtravel.com
Get the web page address
$_SERVER['PHP_SELF']; // /qa/test/index.php
Get the URL Parameters
$_SERVER["QUERY_STRING"]; // v=433 获取用户代理 $_SERVER['HTTP_REFERER']; // http://daxiangtravel.com/qa/test/index.php?v=433
Get the complete url
'http://'.$_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
Get only the path
$url='http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]; echo dirname($url); // http://daxiangtravel.com/qa/test
The complete url including the 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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