Close PHP tags in tests

Closes GH-12422

ext/intl: expose dateformat UDAT_PATTERN constant.

Close GH-12258

Fix GH-12243, segfault on IntlDateFormatter::construct with dateType set to UDAT_PATTERN but not timeType.

udat_open expects its timeStyle's argument to be set to UDAT_PATTERN
when date

Fix GH-12243, segfault on IntlDateFormatter::construct with dateType set to UDAT_PATTERN but not timeType.

udat_open expects its timeStyle's argument to be set to UDAT_PATTERN
when dateStyle is, regardless if there an actual pattern or not.

Close GH-12245

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