获取手机或电脑的ip

直接拿去用，亲测有效！
function getip() {

$unknown = 'unknown';
if(isset($_SERVER['HTTP_X_FORWARDED_FOR']) && $_SERVER['HTTP_X_FORWARDED_FOR'] && strcasecmp($_SERVER['HTTP_X_FORWARDED_FOR'], $unknown)){
    $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
}elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], $unknown)) {
    $ip = $_SERVER['REMOTE_ADDR'];
}
/**
 * 处理多层代理的情况
 * 或者使用正则方式：$ip = preg_match("/[\d\.]{7,15}/", $ip, $matches) ? $matches[0] : $unknown;
 */
if (false !== strpos($ip, ',')) $ip = reset(explode(',', $ip));
return $ip;

}