Online PHP editor | output for k9s3V

@ 2021-01-16T23:10:07Z

<?php

$i = 0;

function is_cyclic(array &$array)
{
    global $i;
    
    // Exit when too deep.
    if (++$i > 10) exit;
    
    echo "Iteration $i:\n";
    echo "Memory usage: " . memory_get_usage() . "\n";
    echo "\n";
    
    $lastKey = array_key_last($array);
    if ($lastKey === null) {
        // Array is empty
        return false;
    }
    static $marker;
    if ($marker === null) {
        $marker = new stdClass();
    }
    if ($array[$lastKey] === $marker) {
        return true;
    }
    $array[] = $marker;
    foreach ($array as &$item) {
        if (is_array($item) && is_cyclic($item)) {
            //array_pop($array);
            return true;
        }
    }
    //array_pop($array);
    return false;
}

function craft_bomb() {
    $array = [range(1, 1000), [range(1, 512), 3]];
    $array[1][1] = &$array;
    return $array;
}

$bomb = craft_bomb();
is_cyclic($bomb);

Output for 8.0.0 - 8.0.1: Iteration 1: Memory usage: 448640 Iteration 2: Memory usage: 449120 Iteration 3: Memory usage: 518104 Iteration 4: Memory usage: 518512 Iteration 5: Memory usage: 571880 Iteration 6: Memory usage: 572288 Iteration 7: Memory usage: 641272 Iteration 8: Memory usage: 641680 Iteration 9: Memory usage: 695048 Iteration 10: Memory usage: 695456
Output for 7.4.0 - 7.4.29: Iteration 1: Memory usage: 448936 Iteration 2: Memory usage: 449416 Iteration 3: Memory usage: 518400 Iteration 4: Memory usage: 518808 Iteration 5: Memory usage: 572176 Iteration 6: Memory usage: 572584 Iteration 7: Memory usage: 641568 Iteration 8: Memory usage: 641976 Iteration 9: Memory usage: 695344 Iteration 10: Memory usage: 695752
Output for 7.3.0 - 7.3.26: Iteration 1: Memory usage: 448976 Iteration 2: Memory usage: 449440 Iteration 3: Memory usage: 510408 Iteration 4: Memory usage: 510808 Iteration 5: Memory usage: 560064 Iteration 6: Memory usage: 560464 Iteration 7: Memory usage: 621432 Iteration 8: Memory usage: 621832 Iteration 9: Memory usage: 671088 Iteration 10: Memory usage: 671488

preferences:dark modelive preview