Mark a word with <mark>

Mark a word .md

You can easily mark a specified word (or array of words) in a string.

<?php
function mark($pattern, $source) {
    if (is_array($pattern)) {
        $finalPatterns = array_map(function ($value) { return "/(".preg_quote($value).")(?![^<]*>|[^<>]*<\/)/i"; }, $pattern);
    } else {
        $finalPatterns = "/(".preg_quote($pattern).")(?![^<]*>|[^<>]*<\/)/i";
    }
    return preg_replace($finalPatterns, "<mark>$1</mark>", $source);
}