PHP判断是手机访问, 并跳转至手机页面

示例代码如下

$agent = $_SERVER['HTTP_USER_AGENT'];
if (strpos($agent, "NetFront") || strpos($agent, "iPhone") || strpos($agent, "MIDP-2.0") || strpos($agent, "Opera Mini") || strpos($agent, "UCWEB") || strpos($agent, "Android") || strpos($agent, "Windows CE") || strpos($agent, "SymbianOS")) {
    header("Location: /?m_home");
    die;
}