<?php strtotime(string $datetime, ?int $baseTimestamp = null): int|false
<?php static private function cachedFileResponse($filename, $contentType, $lastModified, $downloadCallback) { $expires = strtotime('+1 year'); $cacheControl = 'public, max-age=31536000'; if (static::matchesCache($lastModified)) {
<?php { $ifModifiedSince = app(Request::class)->header('if-modified-since'); return $ifModifiedSince !== null && @strtotime($ifModifiedSince) === $lastModified; } static function httpDate($timestamp)