PHP redens keywords in text content, _PHP tutorial

PHP redens the keywords in the text content.

Sometimes when we display an article, we may need to highlight certain keywords in red. Display so that we can quickly find and locate these keywords. Let's take a look at the specific implementation code.

/**
  * 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('item_title','keywords', 'photo_title', 'photo_site','content',)))
    {
     $info = strip_tags($info);
     $info = str_replace(' ', '', $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='red'>{$search_str}</font>", $info);
 
      if($info_arr['match_key']=='')
      $info_arr['match_key'] = $key;
     }
     else
     {
      $info = csubstr($info,300);
     }
    }
    $info_arr[$key] = $info;
   }
  }
  return $info_arr;
 }
 
$str = 'woloveu小君';
$info_arr = array('photo_title' => 'womejiojd我们都围殴防静低屁啊小君鸡冻啊泡脚盆大');
$search_arr = array('小君');
$ret = set_arr_keyword_red($info_arr, $search_arr);
dump($ret );

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