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Bugs & Features
<?php $yr="2011"; $week="01"; $day="Monday"; $day=date("D",strtotime($day)); echo date("Y-m-d", strtotime($yr."W".$week."D ".$day));; ?>
Output for 5.2.0 - 7.1.0
2011-01-04
Output for 5.1.0 - 5.1.6
2011-01-02
Output for 5.0.0 - 5.0.5
2010-12-19
Output for 4.3.0 - 4.4.9
1970-01-01