format('j-n-Y G:i:s'), '%d-%d-%d %d:%d:%d', $day, $month, $year, $hour, $minute, $second); return mktime($hour, $minute, $second, $month, $day, $year); } } if (! function_exists('timezone_select')) { /** * Generates a select field of all available timezones * * Returns a string with the formatted HTML * * @param string $class Optional class to apply to the select field * @param string $default Default value for initial selection * @param integer $what One of the DateTimeZone class constants (for listIdentifiers) * @param string $country A two-letter ISO 3166-1 compatible country code (for listIdentifiers) * * @return string * @throws \Exception */ function timezone_select(string $class = '', string $default = '', int $what = \DateTimeZone::ALL, string $country = null): string { $timezones = \DateTimeZone::listIdentifiers($what, $country); $buffer = "" . PHP_EOL; foreach ($timezones as $timezone) { $selected = ($timezone === $default) ? 'selected' : ''; $buffer .= "{$timezone}" . PHP_EOL; } $buffer .= '' . PHP_EOL; return $buffer; } }