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About the method of redlining keywords in text content in PHP

Jun 04, 2018 am 09:18 AM

php Keywords

This article introduces a function in PHP, which can add red to the keywords of the content, highlight the keywords, and share it with everyone. I hope it will be helpful to everyone.

Sometimes when we display an article, we may need to highlight certain keywords in red 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
  *  &lt;li&gt; $info_arr  array  内容&lt;/li&gt;
  *  &lt;li&gt; $search_arr array  关键词数组 &lt;/li&gt;
  * @return int or array
  */
  function set_arr_keyword_red($info_arr, $search_arr)
 {
  foreach ($search_arr as $search_str)
  {
   foreach ($info_arr as $key =&gt; $info)
   {
    if(in_array($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);
      $info = preg_replace(&quot;/{$search_str}/i&quot;, &quot;&lt;font color=&#39;red&#39;&gt;{$search_str}&lt;/font&gt;&quot;, $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; =&gt; &#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 );

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