- date: documentation ( source)
- strtotime: documentation ( source)
- str_pad: documentation ( source)
<?php
$yr="2011";
$week="01";
$date1 = date(
'Y-m-d',
strtotime($yr . 'W' . str_pad($week, 2, '0', STR_PAD_LEFT))
);echo date("Y-m-d", strtotime($yr."W".$week."D mon"));;
?>