Validate MySQL Timestamp

/**
 * Validate MySQL Timestamp
 * @param string $value Value to check (Y-m-d h:i:s)
 * @return bool TRUE on valid | FALSE anyway
 */
function isTimestampValid ( $value ) {
	$date = array();
	if ( !preg_match ('/^(?<y>19\d\d|20\d\d)\-(?<m>0[1-9]|1[0-2])\-' .
		'(?<d>0\d|[1-2]\d|3[0-1]) (?<h>0\d|1\d|2[0-3]' .
		')\:(?<i>[0-5][0-9])\:(?<s>[0-5][0-9])$/', $value, $date) ) {
		return false;
	}

	return checkdate ( $date['m'], $date['d'], $date['y'] );
}

/************
 * EXAMPLE
 ***********/
var_dump ( isTimestampValid ('2016-09-10 23:21:09') );

/***********
 * OUTPUT
 **********/
# (bool) true