_wp_timezone_choice_usort_callback

Source code

function _wp_timezone_choice_usort_callback( $a, $b ) {

	// Don't use translated versions of Etc

	if ( 'Etc' === $a['continent'] && 'Etc' === $b['continent'] ) {

		// Make the order of these more like the old dropdown

		if ( 'GMT+' === substr( $a['city'], 0, 4 ) && 'GMT+' === substr( $b['city'], 0, 4 ) ) {

			return -1 * ( strnatcasecmp( $a['city'], $b['city'] ) );

		}

		if ( 'UTC' === $a['city'] ) {

			if ( 'GMT+' === substr( $b['city'], 0, 4 ) ) {

				return 1;

			}

			return -1;

		}

		if ( 'UTC' === $b['city'] ) {

			if ( 'GMT+' === substr( $a['city'], 0, 4 ) ) {

				return -1;

			}

			return 1;

		}

		return strnatcasecmp( $a['city'], $b['city'] );

	}

	if ( $a['t_continent'] == $b['t_continent'] ) {

		if ( $a['t_city'] == $b['t_city'] ) {

			return strnatcasecmp( $a['t_subcity'], $b['t_subcity'] );

		}

		return strnatcasecmp( $a['t_city'], $b['t_city'] );

	} else {

		// Force Etc to the bottom of the list

		if ( 'Etc' === $a['continent'] ) {

			return 1;

		}

		if ( 'Etc' === $b['continent'] ) {

			return -1;

		}

		return strnatcasecmp( $a['t_continent'], $b['t_continent'] );

	}

}