php判断设备和微信

<?php
  protected function isPhone(){
        $agent = strtolower($_SERVER['HTTP_USER_AGENT']);
        //pc请求头信息数组
        $pc_arr=array('windows nt','macintosh','ipad','baiduspider','spider');
        //如确认为移动端则更改默认值
        //没找到pc数组元素时判断为移动端
        foreach($pc_arr as $k => $v){
           $pc=strpos($agent, $v) ? true : false;
           if($pc){
              return false;
           } 
        }
        return true;
    }

 <span class="hljs-keyword">protected</span> <span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">is_weixin</span><span class="hljs-params">()</span>{<!-- --></span>
    <span class="hljs-keyword">if</span> ( strpos(<span class="hljs-variable">$_SERVER</span>[<span class="hljs-string">'HTTP_USER_AGENT'</span>], <span class="hljs-string">'MicroMessenger'</span>) !== <span class="hljs-keyword">false</span> ) {
        <span class="hljs-keyword">return</span> <span class="hljs-keyword">true</span>;
    }
    <span class="hljs-keyword">return</span> <span class="hljs-keyword">false</span>;
}</span></code></pre>