How to merge two collections in illuminate/collections?

To merge two collections in Illuminate/Collections, you can use the concat method or the merge method.

Here's an example of using the concat method:

use Illuminate\Support\Collection;

$collection1 = new Collection([1, 2, 3]);
$collection2 = new Collection([4, 5, 6]);

$mergedCollection = $collection1->concat($collection2);

$mergedCollection->all(); // [1, 2, 3, 4, 5, 6]

And here's an example of using the merge method:

use Illuminate\Support\Collection;

$collection1 = new Collection(['name' => 'John', 'age' => 30]);
$collection2 = new Collection(['name' => 'Jane', 'email' => '[email protected]']);

$mergedCollection = $collection1->merge($collection2);

$mergedCollection->all(); // ['name' => 'Jane', 'age' => 30, 'email' => '[email protected]']

Note that the concat method is used to merge the two collections into a new collection, while the merge method modifies the original collection itself.