--TEST-- DateTime::diff() -- absolute --CREDITS-- Daniel Convissor --FILE-- --EXPECT-- test_absolute_7: DIFF: 2009-01-14 00:00:00 EST - 2009-01-07 00:00:00 EST = **P+0Y0M7DT0H0M0S** test_absolute_negative_7: DIFF: 2009-01-07 00:00:00 EST - 2009-01-14 00:00:00 EST = **P+0Y0M7DT0H0M0S**