Online PHP editor | output for sZdbJ

<?php function highlight($needle, $haystack, $respect, $highlightStart, $highlightEnd) { $replacer = static function ($matches) use ($respect, $highlightStart, $highlightEnd) { return $highlightStart . preg_replace('([^' . $respect . ']+)', $highlightEnd . '$0' . $highlightStart, $matches[0]) . $highlightEnd; }; $needle = str_split($needle); foreach ($needle as &$l) { $l = preg_quote($l); } unset($l); $needle = implode('[^' . $respect . ']*', $needle); return preg_replace_callback('(' . $needle . ')', $replacer, $haystack); } echo highlight('1234', '(123) 456-7890', '0-9', '<b>', '</b>');