Date: additional ISO format support

I've finally got working support for additional ISO 8601 formats for Date. It now can input and output: DATE_FORMAT_ISO: YYYY-MM-DD HH:MM:SS (already exists) DATE_FORMAT_ISO_BASIC: YYYYMMDDTHHMMSS-HHMM (new) DATE_FORMAT_ISO_EXTENDED: YYYY-MM-DDTHH:MM:SS-HH:MM (new) DATE_FORMAT_TIMESTAMP: YYYYMMDDHHMMSS (already exists) DATE_FORMAT_UNIXTIME: <secs> (already exists) Several points: o All 3 ISO formats are basically the same, and as such, can be parsed with one regex (more efficient than testing for each format individually). o "Basic" and "Extended" come from the ISO spec. I couldn't find names for these formats in Perl. o Each DATE_FORMAT_* constant specifies a different output format. Even though the /parser/ doesn't differentiate between the 3 ISO formats, the builder does. o To support timezone offsets, I added a toUTCbyOffset() method. Since Date can't look up a timestamp by an offset, I had to convert the datetime to UTC. Unit Test: o To test my changes, I began a PHPUnit test for Date.php. It is not complete, but it checks enough methods to be sure that the new date formats work. Fixed bugs: o I found two bugs while writing the unit test. See the bug tracker[1] o Possible bug: the current Date's regexps do not make sure that the date string contains only a date. I've added ^ and $ to make sure of this. Attachments: o Date-ISO.diff - adds date formats and fixes 2 bugs o testunit_date.php - goes in the tests/ folder, PHPUnit test for Date o testunit.php - goes in tests/, displays Date and Date_Span unit tests -- Marshall Roch [1] http://pear.php.net/bugs/search.php?cmd=display&status=Open&bug_type[]=Date