PHP獲取當前頁面url

• 測試網址: http://localhost/blog/testurl.php?id=5
• //獲取域名或主機地址
• echo $_SERVER['HTTP_HOST']."<br>"; #localhost
• //獲取網頁地址
• echo $_SERVER['PHP_SELF']."<br>"; #/blog/testurl.php
• //獲取網址參數
• echo $_SERVER["QUERY_STRING"]."<br>"; #id=5
• //獲取用戶代理
• echo $_SERVER['HTTP_REFERER']."<br>";
• //獲取完整的url
• echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
• echo 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'].'?'.$_SERVER['QUERY_STRING'];
• #http://localhost/blog/testurl.php?id=5
• //包含端口號的完整url
• echo 'http://'.$_SERVER['SERVER_NAME'].':'.$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"];
• #http://localhost:80/blog/testurl.php?id=5
• //只取路徑
• $url='http://'.$_SERVER['SERVER_NAME'].$_SERVER["REQUEST_URI"];
• echo dirname($url);