- explode: documentation ( source)
- checkdate: documentation ( source)
<?php
$created = '2017-12-31 23:59:00';
$splitBySpace = explode(' ', $created);
if (isset($splitBySpace[0])) {
$splitByLine = explode('-', $splitBySpace[0]);
if (isset($splitByLine[0]) && isset($splitByLine[1]) && isset($splitByLine[2])) {
if (checkdate($splitByLine[1], $splitByLine[2], $splitByLine[0])) {
echo 'true';
}
}
}
echo 'false';
//var_dump(checkdate('2018-04-04'));