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<?php echo date('Y-m-d l w W', strtotime('this week', strtotime('2015-03-02')));
based on Z3k4E
Output for 4.3.5 - 7.2.0
2015-03-02 Monday 1 10
Output for 4.3.0 - 4.3.4
2015-03-09 Monday 1 11