Description:
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On inserting into a timestamp with time zone field the function pg_insert() throws the following error:

pg_insert doesn't like timestamps with 

Notice: pg_insert(): '2008-05-15T16:15:16+0000' does not match with '^([0-9]{4}[/-][0-9]{1,2}[/-][0-9]{1,2})([ \t]+(([0-9]{1,2}:[0-9]{1,2}){1}(:[0-9]{1,2}){0,1}(\.[0-9]+){0,1}([ \t]*([+-][0-9]{1,2}(:[0-9]{1,2}){0,1}|[a-zA-Z]{1,5})){0,1})){0,1}$'

Pg_insert() works fine for '2008-05015T16:15:16+00',the timezone has only 2 digits.

The 4 digit time zone is:
  1) a valid PhP format, DATE_ISO8601
  2) is accepted fine when doing a regular sql insert 

It seems the regex use by pg_insert for the timestamps with timezone should be updated to accept all formats defined by PhP constants DATE_*