PHP開發技巧（六）-判斷是不是行動端存取的範例程式碼

<?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;  
}  
  
?>