Online PHP editor | output for 9ZDMF

@ 2014-01-19T17:52:28Z

<?php

function checkCase($string)
{
    $symMap = [
        "." => ">",
        "," => "<"
    ];

    foreach($symMap as $k => $v)
        $symMap[$v] = $k;

    $element = str_split($string);

    foreach($element as &$item)
    {
        if(in_array($item, $symMap))
            $item = [$item, $symMap[$item]];

        else
            $item = [strtolower($item), strtoupper($item)];
    }

    $flags = array_fill(0, count($element), 0);
    $result = [];

    while(true)
    {
        $solution = "";

        foreach(range(0, count($element) - 1) as $i)
        {

            $solution .= $element[$i][$flags[$i]];
        }

        $isEnding = function() use(&$flags, $element) {
            foreach(range(0, count($flags) - 1) as $i)
            {
                if($flags[$i] < count($element[$i]) - 1)
                {
                    $flags[$i]++;

                    if($i > 0)
                        foreach(range(0, $i - 1) as $j)
                            $flags[$j] = 0;

                    return false;
                }
            }
            return true;
        };

        if(!$isEnding())
            $result[] = $solution;
        else
            break;
    }

    return $result;
}

var_dump(checkCase("A.B"));
var_dump(checkCase("ABCD"));

Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7: array(7) { [0]=> string(3) "a.b" [1]=> string(3) "A.b" [2]=> string(3) "a>b" [3]=> string(3) "A>b" [4]=> string(3) "a.B" [5]=> string(3) "A.B" [6]=> string(3) "a>B" } array(15) { [0]=> string(4) "abcd" [1]=> string(4) "Abcd" [2]=> string(4) "aBcd" [3]=> string(4) "ABcd" [4]=> string(4) "abCd" [5]=> string(4) "AbCd" [6]=> string(4) "aBCd" [7]=> string(4) "ABCd" [8]=> string(4) "abcD" [9]=> string(4) "AbcD" [10]=> string(4) "aBcD" [11]=> string(4) "ABcD" [12]=> string(4) "abCD" [13]=> string(4) "AbCD" [14]=> string(4) "aBCD" }
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[' in /in/9ZDMF on line 5
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5: Parse error: parse error, unexpected '[' in /in/9ZDMF on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/9ZDMF on line 5
Process exited with code 255.

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