Giving a search term a yellow background color

The function below puts a search term $find in bold. It works just fine. However, I would like to make it so that instead of putting $find in bold, it gives it a yellow background, as in the CSS property background-color:#FFFF00;. How could I do this?

Thanks in advance,

John

The function:

function highlight($text, $words) {
    preg_match_all('~\w+~', $words, $m);
    if(!$m)
        return $text;
    $re = '~\\b(' . implode('|', $m[0]) . ')\\b~i';
    return pre开发者_运维问答g_replace($re, '<b>$0</b>', $text);
}

The PHP/HTML:

echo '<td class="sitename1search"><a href="http://www...com>'.highlight($row["title"], $find)).'</a></td>';

The CSS:

.sitename1search { width: 800px;
            font-family: Arial, Helvetica, sans-serif;
            font-weight: normal;
            font-size: 12px;
            overflow:hidden !important;
            color: #000000;
            padding-bottom: 0px;

}

.sitename1search a{ width: 350px;
            font-family: Arial, Helvetica, sans-serif;
            font-weight: normal;
            font-size: 12px;
            overflow:hidden !important;
            color: #004284;
            padding-bottom: 0px;

}

Replace

return preg_replace($re, '<b>$0</b>', $text);

With

return preg_replace($re, '<span style="background-color:#FFFF00;">$0</span>', $text);

Just add the class attribute in your PHP:

function highlight($text, $words) {

    // your php code
    return preg_replace($re, '<span class="found-term">$0</span>', $text); // changed line
}

and add this to your CSS file:

.found-term { 
  background-color:#FFFF00;
  font-weight: bold; 
}

It's better than style attributte in PHP - simply because clashing of logic and design is mostly bad idea.