【php】获取用户IP

代码

/**
 * 获取用户ip地址
 */
function getIp() {
    $ip = isset($_SERVER['REMOTE_ADDR']) ? $_SERVER['REMOTE_ADDR'] : '';
    if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) {
        $list = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']);
        $ip = $list[0];
    }
    if (!ip2long($ip)) {
        $ip = '';
    }
    return $ip;
}