php获取当前url详解编程语言

//http://127.0.0.1/test/aa.php?id=1 
 
//获取域名或主机地址  
 
echo $_SERVER['HTTP_HOST'];//localhost 
 
//获取网页地址  
 
echo $_SERVER['PHP_SELF'];//test/aa.php 
 
//获取参数  
 
echo $_SERVER["QUERY_STRING"]; //id=1 
 
//获取完整的url 
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']; 
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING']; 
// http://127.0.0.1/test/aa.php?id=1 
 
//包含端口号的完整url 
 
echo 'http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];  
 
//获取路径 
 
$url='http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"];  
echo dirname($url); 
# http://127.0.0.1/test