3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $yr="2011"; $week="01"; $day="mon"; $date1 = date( 'Y-m-d', strtotime($yr . 'W' . str_pad($week, 2, '0', STR_PAD_LEFT)) );echo date("Y-m-d", strtotime($yr."W".$week."D ".$day));; ?>
Output for 5.2.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 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