Cake\Chronos\Traits\ModifierTrait::firstOfMonth PHP Метод

firstOfMonth() публичный Метод

Modify to the first occurrence of a given day of the week in the current month. If no dayOfWeek is provided, modify to the first day of the current month. Use the supplied consts to indicate the desired dayOfWeek, ex. ChronosInterface::MONDAY.
public firstOfMonth ( integer | null $dayOfWeek = null ) : mixed
$dayOfWeek integer | null The day of the week to move to.
Результат mixed
    public function firstOfMonth($dayOfWeek = null)
    {
        $day = $dayOfWeek === null ? 'day' : static::$days[$dayOfWeek];
        return $this->modify("first {$day} of this month, midnight");
    }