Highlight Specific Words in a Phrase with PHP

You may use this code to highlight specific words in your displaying search results.

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  1. <?php
  2. function highlight($str, $words){
  3.     if(!is_array($words) || empty($words) || !is_string($str)){
  4.         return false;
  5.     }
  6.     $arr_words = implode('|', $words);
  7.     return preg_replace(
  8.         '@\b('.$arr_words.')\b@si',
  9.         '<strong style="background-color:yellow">$1</strong>',
  10.         $str
  11.     );
  12. }
  13. ?>
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