How to determine whether a client is a mobile phone or a computer in PHP

php method to determine whether a client is a mobile phone or a computer: first create a PHP sample file; then determine whether "$_SERVER['HTTP_USER_AGENT']" contains the keyword "mobile".

The operating environment of this article: windows7 system, PHP7.1 version, DELL G3 computer

How does php determine whether a client is a mobile phone Or a computer?

PHP determines whether the request comes from the mobile terminal or the PC terminal

As the title says, in fact, the simplest way is to determine whether $_SERVER['HTTP_USER_AGENT'] contains The keyword "mobile" (user_agent contains the user's device information), the following is a better judgment method found on the thinkphp forum:

function isMobile(){ 
    // 如果有HTTP_X_WAP_PROFILE则一定是移动设备
    if (isset ($_SERVER['HTTP_X_WAP_PROFILE'])){
        return TRUE;
    }
    // 如果via信息含有wap则一定是移动设备,部分服务商会屏蔽该信息
    if (isset ($_SERVER['HTTP_VIA'])){
        return stristr($_SERVER['HTTP_VIA'], "wap") ? TRUE : FALSE;// 找不到为flase,否则为TRUE
    } 
    // 判断手机发送的客户端标志,兼容性有待提高
    if (isset ($_SERVER['HTTP_USER_AGENT'])) {
        $clientkeywords = array (
            'mobile',
            'nokia',
            'sony',
            'ericsson',
            'mot',
            'samsung',
            'htc',
            'sgh',
            'lg',
            'sharp',
            'sie-',
            'philips',
            'panasonic',
            'alcatel',
            'lenovo',
            'iphone',
            'ipod',
            'blackberry',
            'meizu',
            'android',
            'netfront',
            'symbian',
            'ucweb',
            'windowsce',
            'palm',
            'operamini',
            'operamobi',
            'openwave',
            'nexusone',
            'cldc',
            'midp',
            'wap'
            ); 
        // 从HTTP_USER_AGENT中查找手机浏览器的关键字
        if (preg_match("/(" . implode('|', $clientkeywords) . ")/i", strtolower($_SERVER['HTTP_USER_AGENT']))){
            return TRUE;
        }
    }
    if (isset ($_SERVER['HTTP_ACCEPT'])){ // 协议法，因为有可能不准确，放到最后判断
        // 如果只支持wml并且不支持html那一定是移动设备
        // 如果支持wml和html但是wml在html之前则是移动设备
        if ((strpos($_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;
}

Of course, you can also use PHP's mobile-detect class: https: //github.com/serbanghita/Mobile-Detect. However, I don’t think it is necessary to introduce such a large piece of code for detection (if there are special detection needs, such as detecting iPhone devices or iPad devices, then mobile-detect is a good choice). Under normal circumstances, it can be judged by analyzing USER_AGENT. .

Recommended learning: "PHP Video Tutorial"

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