wp_checkdate │ filter-hook │ WP 3.5.0

Filters whether the given date is valid for the Gregorian calendar.

Usage

add_filter( 'wp_checkdate', 'wp_kama_checkdate_filter', 10, 2 );

/**
 * Function for `wp_checkdate` filter-hook.
 * 
 * @param bool   $checkdate   Whether the given date is valid.
 * @param string $source_date Date to check.
 *
 * @return bool
 */
function wp_kama_checkdate_filter( $checkdate, $source_date ){

	// filter...
	return $checkdate;
}

$checkdate(true|false)

Whether the given date is valid.

$source_date(string)

Date to check.

Changelog

Where the hook is called

return apply_filters( 'wp_checkdate', checkdate( $month, $day, $year ), $source_date );

Where the hook is used in WordPress