array_push() merging multiple array

That's because you're adding a non-object to the last element of the array.

Here i suppose you get an array of objects with the name property

$competition_all = Competition::all();

Here you add a key=>value pair to the last element of the objects array

$newCompete = array('name'=>'Others');
array_push($competition_all, $newCompete);

Here you walk through the array of objects and when it comes to the last element the "$competition_games->name" has no name property

foreach ($competition_all as $competition_games) {
            $this->competition_games[$competition_games->name] = $competition_games->name;
        }

Try something like including a stdclass for it like :

$newCompete = new StdClass();
$newCompete->name = 'Others';
array_push($competition_all, $newCompete);

Merging into New Laravel Collection

resources :

https://stackoverflow.com/questions/23599584/how-to-manually-create-a-new-empty-eloquent-collection-in-laravel-4

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