The code will return the timestamp of the first date of the current date.
$timestamp = mktime(0, 0, 0, date('m'), date('d') - date('w'), date('Y'));
Post being viewed right now
Item date: 25.09.2009
Views: 1452
Item date: 25.09.2009
Views: 297
Item date: 17.06.2009
Views: 931
Item date: 14.05.2009
Views: 1388
Item date: 15.05.2009
Views: 780
Item date: 21.07.2009
Views: 1909
Item date: 12.04.2009
Views: 522
Item date: 15.05.2009
Views: 1475
Item date: 24.08.2009
Views: 222
Item date: 09.03.2009
Views: 386