Subiendo proyecto completo sin restricciones de git ignore

vendor/aiz-packages/combination-generate/src/Providers/CombinationServiceProvider.php

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+<?php
+
+namespace AizPackages\CombinationGenerate\Providers;
+
+use AizPackages\CombinationGenerate\Services\CombinationService;
+use Illuminate\Support\ServiceProvider;
+
+class CombinationServiceProvider extends ServiceProvider
+{
+
+    /**
+     * Register any events for your application.
+     *
+     * @return void
+     */
+    public function boot()
+    {
+    }
+
+    /**
+     * Register any application services.
+     *
+     * @return void
+     */
+    public function register()
+    {
+        $this->app->bind(CombinationService::class, function ($app) {
+            return new CombinationService();
+        });
+    }
+}

vendor/aiz-packages/combination-generate/src/Services/CombinationService.php

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+<?php
+namespace AizPackages\CombinationGenerate\Services;
+
+class CombinationService {
+
+    public function generate_combination($arrays, $i=0)
+    {
+        if (!isset($arrays[$i])) {
+            return array();
+        }
+        if ($i == count($arrays) - 1) {
+            $result = array();
+            foreach ($arrays[$i] as $v) {
+                $result[][] = $v;
+            }
+            return $result;
+        }
+    
+        // get combinations from subsequent arrays
+        $tmp = $this->generate_combination($arrays, $i + 1);
+    
+        $result = array();
+    
+        // concat each array from tmp with each element from $arrays[$i]
+        foreach ($arrays[$i] as $v) {
+            foreach ($tmp as $t) {
+                $result[] = is_array($t) ? 
+                    array_merge(array($v), $t) :
+                    array($v, $t);
+            }
+        }
+    
+        return $result;
+    }
+}