(PHP 5 >= 5.5.0, PHP 7, PECL >= 3.0.0a1)
IntlCalendar::before — Whether this object?s time is before that of the passed object
面向对象风格
过程化风格
Returns whether this object?s time precedes the argument?s time.
calThe IntlCalendar resource.
otherThe calendar whose time will be checked against the primary object?s time.
Returns TRUE if this object?s current time is before that of the
calendar argument?s time. Returns FALSE otherwise.
Also returns FALSE on failure. You can use exceptions or
intl_get_error_code() to detect error conditions.