PHP development skills (6)-Sample code to determine whether it is mobile access

We often use this technique in development. Now it is more convenient to use a mobile phone than a PC, so sometimes in order to make the system more friendly, it is necessary to automatically determine whether the access is from a mobile terminal. If so, let It goes into different paths. Today's article mainly combines several methods into one function, which is more convenient to use.

The following is the code implementation process:

<?php  
  
/** 
 * ======================================= 
 * Created by Zhihua_W. 
 * Author: Zhihua_W 
 * Date: 2016/12/5 0006 
 * Time: 上午 8:45 
 * Project: PHP开发小技巧 
 * Power: 判断是否是移动端访问 
 * ======================================= 
 */  
  
/** 
 * 判断当前访问的用户是PC端，还是手机端，返回true为手机端，false为PC端 
 * @return boolean 
 */  
function isMobile()  
{  
    // 如果有HTTP_X_WAP_PROFILE则一定是移动设备  
    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;  
    }  
    // 脑残法，判断手机发送的客户端标志,兼容性有待提高  
    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;  
    }  
    // 协议法，因为有可能不准确，放到最后判断  
    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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