Immutable DateTime
Standard:
modify("+2 days");
echo $ts->format(DateTime::RFC822), "\n";
echo $new->format(DateTime::RFC822), "\n";
?>]]>
Immutable (new in PHP 5.5):
modify("+2 days");
echo $ts->format(DateTime::RFC822), "\n";
echo $new->format(DateTime::RFC822), "\n";
?>]]>