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@ 2014-02-10T12:56:51Z

<?php
$yr="2011";
$week="01";
$day="mon";
echo date("Y-m-d", strtotime($yr."W".$week."D ".$day));;
    echo date("D",$day);
?>

Output
Performance
VLD
References
Branches

date: documentation ( source)
strtotime: documentation ( source)

preferences:dark modelive preview

26.93 ms | 402 KiB | 5 Q