php-src/tests/classes/iterators_008.phpt

--TEST--
Ensure plain userspace superclass does not override special iterator behaviour on child class.
--FILE--
<?php
Class C {}

class D extends C implements Iterator {

  private $counter = 2;

  public function valid(): bool {
    echo __METHOD__ . "($this->counter)\n";
    return $this->counter;
  }

  public function next(): void {
    $this->counter--;
    echo __METHOD__ . "($this->counter)\n";
  }

  public function rewind(): void {
    echo __METHOD__ . "($this->counter)\n";
  }

  public function current(): mixed {
    echo __METHOD__ . "($this->counter)\n";
    return null;
  }

  public function key(): mixed {
    echo __METHOD__ . "($this->counter)\n";
    return "";
  }

}

foreach (new D as $x) {}
?>
--EXPECT--
D::rewind(2)
D::valid(2)
D::current(2)
D::next(1)
D::valid(1)
D::current(1)
D::next(0)
D::valid(0)