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PHP code example of portavice / permutation

1. Go to this page and download the library: Download portavice/permutation library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php.

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

portavice / permutation example snippets



ortavice\Permutation\Permutation;

// You can also use the static method:
$permutations = Permutation::getPermutations(
    [
        'a' => ['a1', 'a2'],
        'b' => ['b1', 'b2'],
        'c' => ['c1', 'c2'], 
    ]
);
// Output:
// [
//     ['a' => 'a1', 'b' => 'b1', 'c' => 'c1'],
//     ['a' => 'a1', 'b' => 'b1', 'c' => 'c2'],
//     ['a' => 'a1', 'b' => 'b2', 'c' => 'c1'],
//     ['a' => 'a1', 'b' => 'b2', 'c' => 'c2'],
//     ['a' => 'a2', 'b' => 'b1', 'c' => 'c1'],
//     ['a' => 'a2', 'b' => 'b1', 'c' => 'c2'],
//     ['a' => 'a2', 'b' => 'b2', 'c' => 'c1'],
//     ['a' => 'a2', 'b' => 'b2', 'c' => 'c2'],
// ]

// You can also use the recursive method:
$permutations = Permutation::getPermutationsRecursive(
    [
        'a' => ['a1', 'a2'],
        'b' => ['b1', 'b2'],
        'c' => ['c1', 'c2'], 
    ]
);
// Output:
// [
//     ['a' => 'a1'],
//     ['a' => 'a2'],
//     ['b' => 'b1'],
//     ['b' => 'b2'],
//     ['c' => 'c1'],
//     ['c' => 'c2'],
//     ['a' => 'a1', 'b' => 'b1'],
//     ['a' => 'a1', 'b' => 'b2'],
//     ['a' => 'a1', 'c' => 'c1'],
//     ['a' => 'a1', 'c' => 'c2'],
//     ['a' => 'a2', 'b' => 'b1'],
//     ['a' => 'a2', 'b' => 'b2'],
//     ['a' => 'a2', 'c' => 'c1'],
//     ['a' => 'a2', 'c' => 'c2'],
//     ['b' => 'b1', 'c' => 'c1'],
//     ['b' => 'b1', 'c' => 'c2'],
//     ['b' => 'b2', 'c' => 'c1'],
//     ['b' => 'b2', 'c' => 'c2'],
//     ['a' => 'a1', 'b' => 'b1', 'c' => 'c1'],
//     ['a' => 'a1', 'b' => 'b1', 'c' => 'c2'],
//     ['a' => 'a1', 'b' => 'b2', 'c' => 'c1'],
//     ['a' => 'a1', 'b' => 'b2', 'c' => 'c2'],
//     ['a' => 'a2', 'b' => 'b1', 'c' => 'c1'],
//     ['a' => 'a2', 'b' => 'b1', 'c' => 'c2'],
//     ['a' => 'a2', 'b' => 'b2', 'c' => 'c1'],
//     ['a' => 'a2', 'b' => 'b2', 'c' => 'c2'],
// ]

// NEW: Generators! For memory constrained environments.
// More info how to use generators here: https://www.php.net/manual/en/language.generators.overview.php
$permutations = Permutation::getGenerator([
    'a' => ['a1', 'a2'],
    'b' => ['b1', 'b2'],
    'c' => ['c1', 'c2'],
]);

foreach ($permutations as $permutation) {
    // ... do stuff here!
}