Get the number of years between two dates using PHP DateTime class

Years between two dates

// My Birthday :)
$date_1 = new DateTime( '1989-06-15' );

// Todays date
$date_2 = new DateTime( date( 'Y-m-d' ) );

$difference = $date_2->diff( $date_1 );

// Echo the as string to display in browser for testing
echo (string)$difference->y;


/**
 * In a function
 */
function yearsMonthsBetween ( $date1, $date2 ) {
	
	$d1 = new DateTime( $date1 );
	$d2 = new DateTime( $date2 );
	
	$diff = $d2->diff( $d1 );
	
	// Return array years and months
	return array ( 'years' => $diff->y, 'months' => $diff->m );
}