Online PHP editor | output for kIKrU

@ 2018-12-02T09:21:41Z

<?php

function powerSet($n, $minLength=2) {
    $in = range(1,$n);
    $count = count($in);
    $members = pow(2,$count);
    $return = array();
    for ($i = 0; $i < $members; $i++) {
        $b = sprintf("%0".$count."b",$i);
        $out = array();
        for ($j = 0; $j < $count; $j++) {
            if ($b{$j} == '1') $out[] = $in[$j];
        }
        if (count($out) >= 2) {
            $return[] = $out;
        }
    }
    sort($return);
    return $return;
}

echo "\nFor n=2 \n";


foreach(powerSet(2) as $item) {
    echo implode(",",$item)."\n";
}
echo "\nFor n=3 \n";


foreach(powerSet(3) as $item) {
    echo implode(",",$item)."\n";
}

echo "\nFor n=4 \n";


foreach(powerSet(4) as $item) {
    echo implode(",",$item)."\n";
}

echo "\nFor n=5 \n";


foreach(powerSet(5) as $item) {
    echo implode(",",$item)."\n";
}

Output for 8.4.1 - 8.4.14: Parse error: syntax error, unexpected token "{" in /in/kIKrU on line 12
Process exited with code 255.
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.27: Fatal error: Array and string offset access syntax with curly braces is no longer supported in /in/kIKrU on line 12
Process exited with code 255.
Output for 7.4.0 - 7.4.33: Deprecated: Array and string offset access syntax with curly braces is deprecated in /in/kIKrU on line 12 For n=2 1,2 For n=3 1,2 1,3 2,3 1,2,3 For n=4 1,2 1,3 1,4 2,3 2,4 3,4 1,2,3 1,2,4 1,3,4 2,3,4 1,2,3,4 For n=5 1,2 1,3 1,4 1,5 2,3 2,4 2,5 3,4 3,5 4,5 1,2,3 1,2,4 1,2,5 1,3,4 1,3,5 1,4,5 2,3,4 2,3,5 2,4,5 3,4,5 1,2,3,4 1,2,3,5 1,2,4,5 1,3,4,5 2,3,4,5 1,2,3,4,5
Output for 5.6.38, 7.1.26 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33: For n=2 1,2 For n=3 1,2 1,3 2,3 1,2,3 For n=4 1,2 1,3 1,4 2,3 2,4 3,4 1,2,3 1,2,4 1,3,4 2,3,4 1,2,3,4 For n=5 1,2 1,3 1,4 1,5 2,3 2,4 2,5 3,4 3,5 4,5 1,2,3 1,2,4 1,2,5 1,3,4 1,3,5 1,4,5 2,3,4 2,3,5 2,4,5 3,4,5 1,2,3,4 1,2,3,5 1,2,4,5 1,3,4,5 2,3,4,5 1,2,3,4,5

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