PHP中获取当前页面的各类URL格式

测试网址: http://localhost/sangsir/mani...

//获取域名或主机地址
echo $_SERVER['HTTP_HOST'];
#localhost

//获取网页地址
echo $_SERVER['PHP_SELF'];
#/sangsir/manito.php

//获取网址参数
echo $_SERVER["QUERY_STRING"];
#id=1

//获取完整的url
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']; //第一种
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING']; //第二种
#http://localhost/sangsir/manito.php?id=1

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

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