php取得使用者ip


再一些安全防護的情況下需要紀錄或限制使用者的ip時可以使用。

使用server參數取得，詳細的其他功能請參考手冊。
https://www.php.net/manual/zh/reserved.variables.server.php

下方這段會取得ip後回傳。

	function get_client_ip(){
		$ipaddress = '';
		if (isset($_SERVER['HTTP_CLIENT_IP']))
			$ipaddress = $_SERVER['HTTP_CLIENT_IP'];
		else if(isset($_SERVER['HTTP_X_FORWARDED_FOR']))
			$ipaddress = $_SERVER['HTTP_X_FORWARDED_FOR'];
		else if(isset($_SERVER['HTTP_X_FORWARDED']))
			$ipaddress = $_SERVER['HTTP_X_FORWARDED'];
		else if(isset($_SERVER['HTTP_FORWARDED_FOR']))
			$ipaddress = $_SERVER['HTTP_FORWARDED_FOR'];
		else if(isset($_SERVER['HTTP_FORWARDED']))
			$ipaddress = $_SERVER['HTTP_FORWARDED'];
		else if(isset($_SERVER['REMOTE_ADDR']))
			$ipaddress = $_SERVER['REMOTE_ADDR'];
		else
			$ipaddress = 'UNKNOWN';
		return $ipaddress;
	}
Tags : php