PHP中獲取當前頁面的各類URL格式

測試網址: http://localhost/sangsir/mani...

//獲取域名或主機地址
echo $_SERVER['HTTP_HOST'];
#localhost

//獲取網頁地址
echo $_SERVER['PHP_SELF'];
#/sangsir/manito.php

//獲取網址參數
echo $_SERVER["QUERY_STRING"];
#id=1

//獲取完整的url
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']; //第一種
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING']; //第二種
#http://localhost/sangsir/manito.php?id=1

//包含端口號的完整url
echo 'http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
#http://localhost:80/sangsir/manito.php?id=1

//只取路徑
$url='http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"];
echo dirname($url);
#http://localhost/sangsir