先來了解一個變量的含義：
$_SERVER['REMOTE_ADDR']：瀏覽當前頁面的用戶計算機的ip地址
$_SERVER['HTTP_CLIENT_IP']：客戶端的ip
$_SERVER['HTTP_X_FORWARDED_FOR']：瀏覽當前頁面的用戶計算機的網關
$_SERVER['HTTP_X_REAL_IP']：nginx 代理模式下，獲取客戶端真實IP
/** * 獲取客戶端IP地址 */function real_ip(){ $ip = $_SERVER['REMOTE_ADDR']; if (isset($_SERVER['HTTP_X_FORWARDED_FOR']) && preg_match_all('#/d{1,3}/./d{1,3}/./d{1,3}/./d{1,3}#s', $_SERVER['HTTP_X_FORWARDED_FOR'], $matches)) { foreach ($matches[0] AS $xip) { if (!preg_match('#^(10|172/.16|192/.168)/.#', $xip)) { $ip = $xip; break; } } } elseif (isset($_SERVER['HTTP_CLIENT_IP']) && preg_match('/^([0-9]{1,3}/.){3}[0-9]{1,3}$/', $_SERVER['HTTP_CLIENT_IP'])) { $ip = $_SERVER['HTTP_CLIENT_IP']; } elseif (isset($_SERVER['HTTP_CF_CONNECTING_IP']) && preg_match('/^([0-9]{1,3}/.){3}[0-9]{1,3}$/', $_SERVER['HTTP_CF_CONNECTING_IP'])) { $ip = $_SERVER['HTTP_CF_CONNECTING_IP']; } elseif (isset($_SERVER['HTTP_X_REAL_IP']) && preg_match('/^([0-9]{1,3}/.){3}[0-9]{1,3}$/', $_SERVER['HTTP_X_REAL_IP'])) { $ip = $_SERVER['HTTP_X_REAL_IP']; } return $ip;}總結
以上所述是小編給大家介紹的PHP 獲取客戶端 IP 地址的方法實例代碼，希望對大家有所幫助，如果大家有任何疑問歡迎給我留言，小編會及時回復大家的！
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