PHP keyword red marking processing class

/**
  * 关键字套红方法
  * 
  * @access public
  * @param array $options 参数数组
  *  <li> $info_arr  array  内容</li>
  *  <li> $search_arr array  关键词数组 </li>
  * @return int or array
  */
  function set_arr_keyword_red($info_arr, $search_arr)
 {
  foreach ($search_arr as $search_str)
  {
   foreach ($info_arr as $key => $info)
   {
    if(in_array($key,array(&#39;item_title&#39;,&#39;keywords&#39;, &#39;photo_title&#39;, &#39;photo_site&#39;,&#39;content&#39;,)))
    {
     $info = strip_tags($info);
     $info = str_replace(&#39; &#39;, &#39;&#39;, $info);
     $q_str_pos = stripos($info, $search_str);
     if (false!==$q_str_pos)
     {
      $info = csubstr($info, $q_str_pos+150);
      $temp = csubstr($info,$q_str_pos-150);
      $info = substr($info, strlen($temp), 300);
      $info = preg_replace("/{$search_str}/i", "<font color=&#39;red&#39;>{$search_str}</font>", $info);
 
      if($info_arr[&#39;match_key&#39;]==&#39;&#39;)
      $info_arr[&#39;match_key&#39;] = $key;
     }
     else
     {
      $info = csubstr($info,300);
     }
    }
    $info_arr[$key] = $info;
   }
  }
  return $info_arr;
 }
 
$str = &#39;woloveu小君&#39;;
$info_arr = array(&#39;photo_title&#39; => &#39;womejiojd我们都围殴防静低屁啊小君鸡冻啊泡脚盆大&#39;);
$search_arr = array(&#39;小君&#39;);
$ret = set_arr_keyword_red($info_arr, $search_arr);
dump($ret );