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Highlight Search Terms in Text

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Highlight Search Terms in Text

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  1. function HighlightTerms($text_string,$keywords) {
  2.     //this function searches for words from the keywords, and finds matches in the text,
  3.     //and highlights (bolds) them. like google does.
  4.  
  5.     // $text_sting:    the text from which you want to highlight and return...
  6.     // $keywords:      either string or array or words that should be highlighted in the text.
  7.  
  8.     if (!is_array($keywords)) {
  9.         //explode the keywords
  10.         $keywords = explode(" ",$keywords);
  11.     }
  12.     //find matches
  13.     for ($x=0;$x<count($keywords);$x++) {
  14.         if (strlen($keywords[$x]) > 1) {
  15.             preg_match_all ("'" . $keywords[$x] . "'si", $text_string, $items);
  16.             for ($y=0;$y<count($items);$y++) {
  17.                 if (isset($items[$y][0])) {
  18.                     $text_string = str_replace($items[$y][0],'<span class="highlight">' . $items[$y][0] . '</span>',$text_string);
  19.                 }
  20.             }          
  21.         }
  22.     }
  23.     return $text_string;
  24. }

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