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@ 2018-01-26T01:02:16Z

<?php
echo $date = date("Ymd");
$datetime = DateTime::createFromFormat('Ymd', $date);
echo '      -      ';
echo $daynum = date("w", strtotime($datetime->format('D')));

Output
Performance
VLD
References
Branches

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

preferences:dark modelive preview

72.35 ms | 402 KiB | 5 Q