Online PHP editor | output for RovuX

<?php function updateYear(string $text, int $newYear): string { $year = null; $result = preg_replace_callback( '/(\-)(\d\d\d\d)/', function (array $matches) use ($newYear, &$year): string { $year = (int) $matches[2]; return $matches[1] . (string) $newYear; }, $text ); return "Replaced {$year} in '{$text} => '{$result}'"; } echo updateYear('(c) 1970-2022', 2023) . PHP_EOL; echo updateYear('(c) 1999-2022', 2023) . PHP_EOL;