Psecio\Jwt\Claim\NotBefore::validate PHP Метод

Validate the Issued At data

public validate ( string $value ) : boolean
$value	string	Claim data
Результат	boolean	Pass/fail of validation

    public function validate($value)
    {
        if (!is_numeric($value)) {
            return false;
        }
        return true;
    }

NotBefore