代码如下:
<?php function getIp() { $realip = null; if ($realip !== null) return $realip; if (isset($_SERVER)) { if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']); foreach ($arr as $ip) { $ip = trim($ip); if ($ip != 'unknown') { $realip = $ip; break; } } } elseif (isset($_SERVER['HTTP_CLIENT_IP'])) { $realip = $_SERVER['HTTP_CLIENT_IP']; } else { if (isset($_SERVER['REMOTE_ADDR'])) { $realip = $_SERVER['REMOTE_ADDR']; } else { $realip = '0.0.0.0'; } } } else { if (getenv('HTTP_X_FORWARDED_FOR')) { $realip = getenv('HTTP_X_FORWARDED_FOR'); } elseif (getenv('HTTP_CLIENT_IP')) { $realip = getenv('HTTP_CLIENT_IP'); } else { $realip = getenv('REMOTE_ADDR'); } } preg_match("/[\d\.]{7,15}/", $realip, $onlineip); $realip = !empty($onlineip[0]) ? $onlineip[0] : '0.0.0.0'; return $realip; } ?>