Laravel - Collections - Method Mergerecursive

The mergeRecursive method merges the given array or collection recursively with the original collection. If a string key in the given items matches a string key in the original collection, then the values for these keys are merged together into an array, and this is done recursively:

    
    $collection = collect(['product_id' => 1, 'price' => 100]);
    
    $merged = $collection->mergeRecursive([
        'product_id' => 2,
        'price' => 200,
        'discount' => false
    ]);
    
    $merged->all();
    
    // ['product_id' => [1, 2], 'price' => [100, 200], 'discount' => false]