Online PHP editor | refs for U9FME

<?php function getFormattedDate(string $date, string $format = 'm/d/Y', string $yearPadding = '19'): string { $sanitizedDate = preg_replace_callback( '~^(\d+)(\D)(\d+)\2(\d{2}|\d{4})$~', fn($m) => sprintf('%02d/%02d/%d', $m[1], $m[3], str_pad($m[4], 4, $yearPadding, STR_PAD_LEFT)), $date ); // sanitize $d = DateTime::createFromFormat($format, $sanitizedDate); // attempt to parse if (!$d) { throw new Exception("Could not parse date: $date"); } $formattedDate = $d->format($format); if ($formattedDate !== $sanitizedDate) { throw new Exception("Date not in a desired American format: $date"); } else { return $date; } } $tests = [ '1-1-1992', '1-1-92', '1-01-1992', '1-01-92', '01-1-1992', '01-1-92', '01-01-1992', '01-01/92', '1/1/1992', '1/1/92', '1/01/1992', '1/01/92', '01/1/199', '01/1/92', '01/01/1992', '01/01/92' ]; foreach ($tests as $test) { try { echo getFormattedDate($test); } catch (Exception $e) { echo $e->getMessage(); } echo "\n"; }