判断Android还是iOS或者微信内置浏览器

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//判断是否为安卓手机

public function isAndroid()

{

    if(isset($_SERVER['HTTP_USER_AGENT'])){

        $agent = strtolower($_SERVER['HTTP_USER_AGENT']);

        if(strpos($agent,'android') !== false)

            return true;

    }

    return false;

}

//判断是否为iphone或者ipad

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public function isIos()

{

    if(isset($_SERVER['HTTP_USER_AGENT'])){

        $agent = strtolower($_SERVER['HTTP_USER_AGENT']);

        if(strpos($agent, 'iphone')||strpos($agent, 'ipad'))

            return true;

    }

    return false;

}

//判断是否为微信内置浏览器打开

public function isWechet()

{

    if(isset($_SERVER['HTTP_USER_AGENT']) && strpos($_SERVER['HTTP_USER_AGENT'], 'MicroMessenger') !== false){

        return true;

    }

    return false;

}

//整合到一起，判断当前设备，1：安卓；2：IOS；3：微信；0：未知

public function isDevice()

{

    if($_SERVER['HTTP_USER_AGENT']){

        $agent = strtolower($_SERVER['HTTP_USER_AGENT']);

        if(strpos($agent, 'micromessenger') !== false)

            return 3;

        elseif(strpos($agent, 'iphone')||strpos($agent, 'ipad'))

            return 2;

        else

            return 1;

    }

    return 0;

}