Check date format in PHP, check the validity of date in php apply this code.
<?php function validDate($date, $format = 'Y-m-d') { $d = DateTime::createFromFormat($format, $date); return $d && $d->format($format) == $date; } var_dump(validDate('2017-01-01')); echo "<br>"; var_dump(validDate('2017-25-01')); echo "<br>"; var_dump(validDate(2,29,2004)); echo "<br>"; var_dump(validDate('17-25-01')); ?>
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