3v4l.org

run code in 300+ PHP versions simultaneously

@ 2019-11-26T21:42:59Z

<?php

$example = [
    ['text' => 'a', 'children' => [
        ['text' => 'b'],
        ['text' => 'c'],
        ['text' => 'd', 'children' => [
            ['text' => 'e'],
            ['text' => 'f'],
            ['text' => 'g', 'children' => [
                ['text' => 'h'],
                ['text' => 'i'],
                ['text' => 'j'],
            ]],
            ['text' => 'k'],
            ['text' => 'l'],
            ['text' => 'm'],
        ]],
        ['text' => 'n'],
        ['text' => 'o'],
        ['text' => 'p'],
    ]]
];

function listElements(array $input, $depth = 0)
{
    end($input);
    $final = key($input);
    $n = count($input);
    foreach ($input as $key => $element) {
        echo $element['text'];
        echo ($key == $final) ? " last of $n," : '';
        echo " depth $depth", PHP_EOL;
        if (isset($element['children'])) {
            listElements($element['children'], $depth + 1);
        }
    }
}

listElements($example);

Output for 7.1.25 - 7.1.33, 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 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.28, 8.4.1 - 8.4.14, 8.5.0: a last of 1, depth 0 b depth 1 c depth 1 d depth 1 e depth 2 f depth 2 g depth 2 h depth 3 i depth 3 j last of 3, depth 3 k depth 2 l depth 2 m last of 6, depth 2 n depth 1 o depth 1 p last of 6, depth 1
Output for 8.4.15: /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libm.so.6: version `GLIBC_2.35' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.34' not found (required by /bin/php-8.4.15) /bin/php-8.4.15: /usr/lib/libc.so.6: version `GLIBC_2.38' not found (required by /bin/php-8.4.15)
Process exited with code 1.

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