highlight multiple keywords in search

Question

i\'m using this code to highlight search keywords:

function highlightWords($string, $word)
 {

        $string = str_replace($word, \"

        

Answer 1

PHP > 5.3.0, try preg_filter()

/**
 * Highlighting matching string
 * @param   string  $text           subject
 * @param   string  $words          search string
 * @return  string  highlighted text
 */
public function highlight($text, $words) {
    $highlighted = preg_filter('/' . preg_quote($words, '/') . '/i', '$0', $text);
    if (!empty($highlighted)) {
        $text = $highlighted;
    }
    return $text;
}