Online PHP editor | output for QmfJM

@ 2016-12-15T18:50:49Z

<?php

function iterate($current, $queue, $result = null)
{
    if (!$current) {
        return $result;
    }

    return iterate(step($queue), $queue, $current);
}

function step(&$queue)
{
    return next($queue);
}

function start($queue)
{
    return current($queue);
}

function traverse($queue)
{
    return iterate(start($queue), $queue);
}

$queue = ['foo', 'bar', 'baz'];

$queue = unserialize(serialize($queue));

echo traverse($queue); //baz

Output for 5.6.0 - 5.6.29, 7.1.25, 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 - 8.5.1: baz
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.
Output for 7.0.0 - 7.0.14, 7.1.0: Process exited with code 137.

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