Highlight search tag on search result page - wordpress[resolved]

You can write below code in your search page:

$title = get_the_title(); 

$keys= explode(" ",$s); 

$title = preg_replace('/('.implode('|', $keys) .')/iu', '<span class="red-bg">\0</span>', $title); 

$excerpt = get_the_excerpt();

$keys = explode(" ",$s);

$excerpt = preg_replace('/('.implode('|', $keys) .')/iu', '<span class="red-bg">\0</span>', $excerpt);

<h2><?php echo $title; ?></h2>

<p><?php echo $excerpt;?></p>