Online PHP editor | output for bq2df

@ 2020-08-23T21:08:49Z

<?php

class test
{
    private $whatever = false;

    public function __construct()
    {
        $a = iterator_to_array($this->firstIterator());
        $b = iterator_to_array($this->secondIterator($this->firstIterator()));
        $c = iterator_to_array($this->thirdIterator($this->firstIterator()));

        $this->whatever = true;
        $d = iterator_to_array($this->firstIterator());
        $e = iterator_to_array($this->secondIterator($this->firstIterator()));
        $f = iterator_to_array($this->thirdIterator($this->firstIterator()));

        var_dump([$a, $b, $c, $d, $e, $f]);
    }

    public function firstIterator(): \Iterator
    {
        yield 'a'=> 1;
        yield 'b'=> 2;
        yield 'c'=> 3;
    }

    public function secondIterator(\Iterator $first): \Iterator
    {
        if ($this->whatever === true)
        {
            return $first;
        }

        foreach($first as $key=>$value)
        {
            yield $key => $value * $value;
        }
    }

    public function thirdIterator(\Iterator $first): \Iterator
    {
        if ($this->whatever === true)
        {
            return $first;
        }

        return $this->thirdSubIterator($first);
    }

    public function thirdSubIterator(\Iterator $first): \Iterator
    {
        foreach($first as $key=>$value)
        {
            yield $key => $value * $value;
        }
    }
}

new test();

Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: array(6) { [0]=> array(3) { ["a"]=> int(1) ["b"]=> int(2) ["c"]=> int(3) } [1]=> array(3) { ["a"]=> int(1) ["b"]=> int(4) ["c"]=> int(9) } [2]=> array(3) { ["a"]=> int(1) ["b"]=> int(4) ["c"]=> int(9) } [3]=> array(3) { ["a"]=> int(1) ["b"]=> int(2) ["c"]=> int(3) } [4]=> array(0) { } [5]=> array(3) { ["a"]=> int(1) ["b"]=> int(2) ["c"]=> int(3) } }
Output for 8.3.5: Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 array(6) { [0]=> array(3) { ["a"]=> int(1) ["b"]=> int(2) ["c"]=> int(3) } [1]=> array(3) { ["a"]=> int(1) ["b"]=> int(4) ["c"]=> int(9) } [2]=> array(3) { ["a"]=> int(1) ["b"]=> int(4) ["c"]=> int(9) } [3]=> array(3) { ["a"]=> int(1) ["b"]=> int(2) ["c"]=> int(3) } [4]=> array(0) { } [5]=> array(3) { ["a"]=> int(1) ["b"]=> int(2) ["c"]=> int(3) } }

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