How does php determine whether access is from a mobile phone or a computer?-PHP Problem-php.cn

How does php determine whether access is from a mobile phone or a computer?

PHPz

Release： 2023-03-05 22:32:01

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php method to determine whether it is mobile access or computer access: 1. If there is [HTTP_X_WAP_PROFILE], it must be a mobile device; 2. Find the keyword of the mobile browser from [HTTP_USER_AGENT]; 3. If only If it supports wml and does not support html, it must be a mobile device.

How does php determine whether access is from a mobile phone or a computer?

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How to determine whether access is via mobile phone or computer:

1. If there is HTTP_X_WAP_PROFILE, it must be a mobile device

//判断电脑还是手机访问
    function is_mobile(){ 
        
        if (isset ($_SERVER[&#39;HTTP_X_WAP_PROFILE&#39;]))
        {
            return true;
        } 
        // 如果via信息含有wap则一定是移动设备,部分服务商会屏蔽该信息
        if (isset ($_SERVER[&#39;HTTP_VIA&#39;]))
        { 
            // 找不到为flase,否则为true
            return stristr($_SERVER[&#39;HTTP_VIA&#39;], "wap") ? true : false;
        }

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2. Brainless method, judge the client flag sent by the mobile phone, the compatibility needs to be improved

if (isset ($_SERVER[&#39;HTTP_USER_AGENT&#39;]))
{
    $clientkeywords = array (&#39;nokia&#39;,
        &#39;sony&#39;,
        &#39;ericsson&#39;,
        &#39;mot&#39;,
        &#39;samsung&#39;,
        &#39;htc&#39;,
        &#39;sgh&#39;,
        &#39;lg&#39;,
        &#39;sharp&#39;,
        &#39;sie-&#39;,
        &#39;philips&#39;,
        &#39;panasonic&#39;,
        &#39;alcatel&#39;,
        &#39;lenovo&#39;,
        &#39;iphone&#39;,
        &#39;ipod&#39;,
        &#39;blackberry&#39;,
        &#39;meizu&#39;,
        &#39;android&#39;,
        &#39;netfront&#39;,
        &#39;symbian&#39;,
        &#39;ucweb&#39;,
        &#39;windowsce&#39;,
        &#39;palm&#39;,
        &#39;operamini&#39;,
        &#39;operamobi&#39;,
        &#39;openwave&#39;,
        &#39;nexusone&#39;,
        &#39;cldc&#39;,
        &#39;midp&#39;,
        &#39;wap&#39;,
        &#39;mobile&#39;
        ); 
    // 从HTTP_USER_AGENT中查找手机浏览器的关键字
    if (preg_match("/(" . implode(&#39;|&#39;, $clientkeywords) . ")/i", strtolower($_SERVER[&#39;HTTP_USER_AGENT&#39;])))
    {
        return true;
    } 
}

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3. Protocol method, Because it may not be accurate, I will leave it to the final judgment

  if (isset ($_SERVER[&#39;HTTP_ACCEPT&#39;]))
    { 
        // 如果只支持wml并且不支持html那一定是移动设备
        // 如果支持wml和html但是wml在html之前则是移动设备
        if ((strpos($_SERVER[&#39;HTTP_ACCEPT&#39;], &#39;vnd.wap.wml&#39;) !== false) && (strpos($_SERVER[&#39;HTTP_ACCEPT&#39;], &#39;text/html&#39;) === false || (strpos($_SERVER[&#39;HTTP_ACCEPT&#39;], &#39;vnd.wap.wml&#39;) < strpos($_SERVER[&#39;HTTP_ACCEPT&#39;], &#39;text/html&#39;))))
        {
            return true;
        } 
    } 
    return false;
}

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