BusinessDayPeriodIterator.php

<?php
class BusinessDayPeriodIterator implements \Iterator
{
    private $current;
    private $period = [];

    public function __construct(\DatePeriod $period) {
        $this->period = $period;
        $this->current = $this->period->getStartDate();
        if(!$period->include_start_date){
            $this->next();
        }

        $this->endDate = $this->period->getEndDate();
    }

    public function rewind() {
        $this->current->subtract($this->period->getDateInterval());
    }

    public function current() {
        return clone $this->current;
    }

    public function key() {
        return $this->current->diff($this->period->getStartDate());
    }

    public function next() {
        $this->current->add($this->period->getDateInterval());
    }

    public function valid() {
        return $this->current < $this->endDate;
    }

    public function extend()
    {
        $this->endDate->add($this->period->getDateInterval());
    }

    public function isSaturday()
    {
        return $this->current->format('N') == 6;
    }

    public function isSunday()
    {
        return $this->current->format('N') == 7;
    }

    public function isWeekend()
    {
        return ($this->isSunday() || $this->isSaturday());
    }
}

Bro, why not a FilterIterator?

@manofirmz that is a great idea! I think when I wrote this I was just starting with iterators. BTW, how did you come across this gist?

@manofirmz que ótima ideia! Acho que quando escrevi isso, estava apenas começando com os iteradores. BTW, como você descobriu essa essência?

When I think of iterators, I think of collections. In this case, a collection of Dates, or Periods / Intervals. Therefore, a filter for working days makes perfect sense, based on a collection.

@manofirmz that is a great idea! I think when I wrote this I was just starting with iterators. BTW, how did you come across this gist?

Here: https://www.php.net/manual/en/class.dateperiod.php

:)