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<?php
namespace Drobotik\Eav\Validation\Constraints;
use Drobotik\Eav\Interfaces\ConstraintInterface;
class DateConstraint implements ConstraintInterface
{
private string $format;
public function __construct(string $format = 'Y-m-d')
$this->format = $format;
}
public function validate($value): ?string
if (!is_string($value)) {
return "This value must be a string.";
$dateTime = \DateTime::createFromFormat($this->format, $value);
if (!$dateTime || $dateTime->format($this->format) !== $value) {
$dateTime
DateTime
true
return "This value must be a valid date in {$this->format} format.";
return null;
kuperwood /
eav
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