gistfile1.aw

<?php
class Date {
	/**
	 * Convert a local timestamp to a GMT timestamp.
	 *
	 * @static
	 *
	 * @param  string  $timestamp
	 * @param  string  $timezone
	 * @param  string  $format
	 *
	 * @return string
	 */
	public static function local_to_gmt($timestamp, $timezone, $format = '')
	{
		if ($format == '')
		{
			$format = self::FORMAT_SQL;
		}

		if (is_numeric($timezone))
		{
			$dt = new DateTime($timestamp);
			$timestamp = intval($dt->format('U')) - (floatval($timezone) * 60 * 60);
			return date($format, $timestamp);
		}
		else
		{
			$dt = new DateTime($timestamp, new DateTimeZone($timezone));
			$dt->setTimezone(new DateTimeZone('GMT'));
			return $dt->format($format);
		}
	}

	/**
	 * Converts a GMT timestamp to the local timestamp.
	 *
	 * @static
	 *
	 * @param  string  $timestamp
	 * @param  string  $timezone
	 * @param  string  $format
	 *
	 * @return string
	 */
	public static function gmt_to_local($timestamp, $timezone, $format = '')
	{
		if ($format == '')
		{
			$format = self::FORMAT_DISPLAY;
		}

		try
		{
			$dt = new DateTime($timestamp, new DateTimeZone('GMT'));
			$dt->setTimezone(new DateTimeZone($timezone));
			return $dt->format($format);
		} catch (Exception $e)
		{
			return date($format, $timestamp); // Just send back what we get.
		}
	}

	/**
	 * Get all the dateparts for the local time.
	 *
	 * @static
	 *
	 * @param  string  $timestamp
	 * @param  string  $timezone
	 *
	 * @return array
	 */
	public static function gmt_to_local_dateparts($timestamp, $timezone)
	{
		$dt = new DateTime($timestamp, new DateTimeZone('GMT'));
		try
		{
			$dt->setTimezone(new DateTimeZone($timezone));
		} catch (Exception $e)
		{
			$dt->setTimezone(new DateTimeZone('US/Eastern'));
		}

		return array(
			$dt->format('U'),
			'seconds' => intval($dt->format('s')),
			'minutes' => intval($dt->format('i')),
			'hours' => $dt->format('G'),
			'mday' => $dt->format('j'),
			'wday' => $dt->format('w'),
			'mon' => $dt->format('n'),
			'year' => $dt->format('Y'),
			'yday' => $dt->format('z'),
			'weekday' => $dt->format('l'),
			'month' => $dt->format('F'),
		);
	}
}