<!DOCTYPE html>
<html lang="zh-cn">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1,maximum-scale=1, user-scalable=no">
<title>PHP中获取当前URL</title>
</head>
<body>
<script type="text/javascript">
var a = top.location.href; //顶级窗口的地址
var b = this.location.href; //当前窗口的地址
document.write('顶级窗口的地址:'+a+'<br>当前窗口的地址:'+b+'<br><br>');
</script>
<?php
//测试网站：http://localhost/webManage/demo.php?f=onestopweb.cn
echo '获取域名或主机地址:<br>';
echo $_SERVER['HTTP_HOST']."<br>";
echo '获取网页地址:<br>';
echo $_SERVER['PHP_SELF']."<br>";
echo '获取网址参数:<br>';
echo $_SERVER["QUERY_STRING"]."<br>";
echo '获取完整的url:<br>';
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']."<br>";
echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING']."<br>";
echo '包含端口号的完整url:<br>';
echo 'http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"]."<br>";
$url='http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"]."<br>";
echo dirname($url);
?>
</body>
</html>
效果图：