Check if a string is a valid date(time)

DateHelper.php

// ....
// 
// Usage Example:
//
// var_dump($this->isValidDateTimeString('2018-13-10', 'Y-m-d')); # false
// var_dump($this->isValidDateTimeString('2018-12-10', 'Y-m-d')); # true
// var_dump($this->isValidDateTimeString('10/13/2018')); # false
// var_dump($this->isValidDateTimeString('10/12/2018')); # true

/**
 * Check if a string is a valid date(time)
 *
 * DateTime::createFromFormat requires PHP >= 5.3
 *
 * @param string $date
 * @param string $format
 * @return bool
 */
public function isValidDateTimeString(string $date, string $format = 'd/m/Y') : bool
{
    return (\DateTime::createFromFormat($format, $date) !== false)
        && (\DateTime::getLastErrors()["warning_count"] == 0 && \DateTime::getLastErrors()["error_count"] == 0);
}