Arr::crossJoin() | Laravel Helper Function

Arr::crossJoin() laravel helper function will help to make cross the array of each key and values of key of each index.

Using this Arr::crossJoin() function array will cross each key's and value.

Sometime developer need to make cross the array.

Here below example using laravel helper function array, crossJoin function the array make cross into each key's and value.

This Arr::crossJoin() in laravel function crossjoin the given arrays and returning a certesian product with all prossible permutations.

<?php

use Illuminate\Support\Facades\Route;
use Arr;

/*
|--------------------------------------------------------------------------
| Web Routes
|--------------------------------------------------------------------------
|
| Here is where you can register web routes for your application. These
| routes are loaded by the RouteServiceProvider within a group which
| contains the "web" middleware group. Now create something great!
|
*/

Route::get('/arr-collapse', function () {

    // Example 1

    $matrix = Arr::crossJoin([1, 2], ['a', 'b']);

    /*

        [
            [1, 'a'],
            [1, 'b'],
            [2, 'a'],
            [2, 'b'],
        ]

    */

    // Example 2 

    $matrix = Arr::crossJoin([1, 2], ['a', 'b'], ['I', 'II']);

    /*
        [
            [1, 'a', 'I'],
            [1, 'a', 'II'],
            [1, 'b', 'I'],
            [1, 'b', 'II'],
            [2, 'a', 'I'],
            [2, 'a', 'II'],
            [2, 'b', 'I'],
            [2, 'b', 'II'],
        ]
    */
});

Please follow the above example and apply in your laravel application.

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