Online PHP editor | output for mLIlQ

@ 2017-11-09T14:39:27Z

<?php

function matrix_brute_solve(array $matrix) {
    matrix_make_square($matrix);
    foreach (matrix_generate_vectors($matrix) as $vector) {
        $attempt = matrix_rotate($matrix, $vector);
        if (matrix_is_solved($attempt))
            return matrix_display($attempt);
    }
    echo 'No solution';
}

function matrix_make_square(array &$matrix) {
    $pad = count(array_keys($matrix));
    foreach ($matrix as &$row)
        $row = array_pad($row, $pad, '');
}

function matrix_generate_vectors(array $matrix) {
    $vectors = [];
    $columns = count(current($matrix));
    $gen = function ($depth=0, $combo='') use (&$gen, &$vectors, $columns) {
        if ($depth < $columns)
            for ($i = 0; $i < $columns; $i++)
                $gen($depth + 1, $i . $combo);
        else
            $vectors[] = array_map('intval', str_split($combo));
    };
    $gen();
    return $vectors;
}

function matrix_rotate(array $matrix, array $vector) {
   foreach ($matrix as $row => &$values) {
       array_rotate($values, $vector[$row]);
   }
   return $matrix;
}

function matrix_is_solved(array $matrix) {
    foreach (array_keys(current($matrix)) as $offset) {
        $column = array_filter($raw = array_column($matrix, $offset));
        if (count($column) != count(array_unique($column))) return false;
    }
    return true;
}

function array_rotate(array &$array, $offset) {
    foreach (array_slice($array, 0, $offset) as $key => $val) {
        unset($array[$key]);
        $array[$key] = $val;
    }
    $array = array_values($array);
}

function matrix_display(array $matrix = null) {
    echo "[\n";
    foreach ($matrix as $row => $inner) {
        echo "  $row => ['" . implode("', '", $inner) . "']\n";
    }
    echo "]\n";
}

$tests = [
    [ ['X'], ['X'] ],
    [ ['X'], ['X'], ['X'] ],
    [ [ 'X', '' ], [ '', 'X' ] ],
    [ ['X', 'Y', 'Z'], ['X', 'Y'], ['X']],
    [ ['X', 'Y'], ['X', 'Y'], ['X', 'Y'] ],
    [ ['X', 'Y', 'Z'], ['X', 'Y', 'Z'], ['X', 'Y', 'Z'] ],
    [ ['X', 'Y', 'Z', 'I', 'J'], ['X', 'Y', 'Z', 'I'], ['X', 'Y', 'Z', 'I'], ['X', 'Y', 'Z', 'I'], ['X', 'Y', 'Z'], ['X', 'Y', 'Z'] ],
];
array_map(function ($matrix) {
    matrix_display($matrix);
    echo "solved by:" . PHP_EOL;
    matrix_brute_solve($matrix);
    echo PHP_EOL;
}, $tests);

Output for 8.4.1 - 8.4.18, 8.5.0 - 8.5.3: Deprecated: matrix_display(): Implicitly marking parameter $matrix as nullable is deprecated, the explicit nullable type must be used instead in /in/mLIlQ on line 56 [ 0 => ['X'] 1 => ['X'] ] solved by: [ 0 => ['', 'X'] 1 => ['X', ''] ] [ 0 => ['X'] 1 => ['X'] 2 => ['X'] ] solved by: [ 0 => ['', 'X', ''] 1 => ['', '', 'X'] 2 => ['X', '', ''] ] [ 0 => ['X', ''] 1 => ['', 'X'] ] solved by: [ 0 => ['X', ''] 1 => ['', 'X'] ] [ 0 => ['X', 'Y', 'Z'] 1 => ['X', 'Y'] 2 => ['X'] ] solved by: [ 0 => ['Z', 'X', 'Y'] 1 => ['Y', '', 'X'] 2 => ['X', '', ''] ] [ 0 => ['X', 'Y'] 1 => ['X', 'Y'] 2 => ['X', 'Y'] ] solved by: [ 0 => ['', 'X', 'Y'] 1 => ['Y', '', 'X'] 2 => ['X', 'Y', ''] ] [ 0 => ['X', 'Y', 'Z'] 1 => ['X', 'Y', 'Z'] 2 => ['X', 'Y', 'Z'] ] solved by: [ 0 => ['Z', 'X', 'Y'] 1 => ['Y', 'Z', 'X'] 2 => ['X', 'Y', 'Z'] ] [ 0 => ['X', 'Y', 'Z', 'I', 'J'] 1 => ['X', 'Y', 'Z', 'I'] 2 => ['X', 'Y', 'Z', 'I'] 3 => ['X', 'Y', 'Z', 'I'] 4 => ['X', 'Y', 'Z'] 5 => ['X', 'Y', 'Z'] ] solved by: [ 0 => ['', 'X', 'Y', 'Z', 'I', 'J'] 1 => ['', '', 'X', 'Y', 'Z', 'I'] 2 => ['I', '', '', 'X', 'Y', 'Z'] 3 => ['Z', 'I', '', '', 'X', 'Y'] 4 => ['Y', 'Z', '', '', '', 'X'] 5 => ['X', 'Y', 'Z', '', '', ''] ]
Output for 7.0.0 - 7.0.25, 7.1.0 - 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30: [ 0 => ['X'] 1 => ['X'] ] solved by: [ 0 => ['', 'X'] 1 => ['X', ''] ] [ 0 => ['X'] 1 => ['X'] 2 => ['X'] ] solved by: [ 0 => ['', 'X', ''] 1 => ['', '', 'X'] 2 => ['X', '', ''] ] [ 0 => ['X', ''] 1 => ['', 'X'] ] solved by: [ 0 => ['X', ''] 1 => ['', 'X'] ] [ 0 => ['X', 'Y', 'Z'] 1 => ['X', 'Y'] 2 => ['X'] ] solved by: [ 0 => ['Z', 'X', 'Y'] 1 => ['Y', '', 'X'] 2 => ['X', '', ''] ] [ 0 => ['X', 'Y'] 1 => ['X', 'Y'] 2 => ['X', 'Y'] ] solved by: [ 0 => ['', 'X', 'Y'] 1 => ['Y', '', 'X'] 2 => ['X', 'Y', ''] ] [ 0 => ['X', 'Y', 'Z'] 1 => ['X', 'Y', 'Z'] 2 => ['X', 'Y', 'Z'] ] solved by: [ 0 => ['Z', 'X', 'Y'] 1 => ['Y', 'Z', 'X'] 2 => ['X', 'Y', 'Z'] ] [ 0 => ['X', 'Y', 'Z', 'I', 'J'] 1 => ['X', 'Y', 'Z', 'I'] 2 => ['X', 'Y', 'Z', 'I'] 3 => ['X', 'Y', 'Z', 'I'] 4 => ['X', 'Y', 'Z'] 5 => ['X', 'Y', 'Z'] ] solved by: [ 0 => ['', 'X', 'Y', 'Z', 'I', 'J'] 1 => ['', '', 'X', 'Y', 'Z', 'I'] 2 => ['I', '', '', 'X', 'Y', 'Z'] 3 => ['Z', 'I', '', '', 'X', 'Y'] 4 => ['Y', 'Z', '', '', '', 'X'] 5 => ['X', 'Y', 'Z', '', '', ''] ]

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