How to determine whether a mobile phone login (code) by PHP method

The judgment of mobile phone login is of great significance in PHP development, this article will introduce this method of judgment.

Use the PHP method to determine if a mobile login code tutorial:

function Is_mobile () {    static $is _mobile;    if (Isset ($is _mobile)) {        return $is _mobile;    }    if (Empty ($_server[' http_user_agent ')) {        $is _mobile = false;    } ElseIf    (Strpos ($_server[' Http_user_ AGENT '],     ' Mobile ')!== false | | Strpos ($_server[' http_user_agent '),     ' Android ')!== false | | Strpos ($_server[' http_user_agent '],     ' silk/')! = = False | | Strpos ($_server[' http_user_agent '),     ' Kindle ')!== false | | Strpos ($_server[' http_user_agent '],      ' BlackBerry ')!== false | | Strpos ($_server[' http_user_agent '),       ' opera Mini ')!== false | | Strpos ($_server[' http_user_agent '),       ' opera Mobi ')!== false    ) {        $is _mobile = true;    } else {        $is _mobile = false;    }     return $is _mobile;}

This article describes the PHP method to determine whether a mobile phone login code example, more relevant content please pay attention to the PHP Chinese web.