Fix Infinite Loop in Laravel

Infinite Loops in Laravel

Laravel's elegant event system and Eloquent model observers can accidentally create feedback loops that grind your application to a halt.

The Observer Trap

The most common infinite loop in Laravel happens when a model observer triggers the same event it's listening to:

// In UserObserver.php — INFINITE LOOP
public function updated(User $user)
{
    // This triggers another 'updated' event!
    $user->update(['last_activity' => now()]);
}

When updated fires, it calls update(), which fires updated again. This continues until PHP hits its memory limit.

The Fix

Use saveQuietly() or withoutEvents() to break the cycle:

public function updated(User $user)
{
    // Saves without firing events
    $user->saveQuietly();
    // Or use the static method:
    User::withoutEvents(function () use ($user) {
        $user->update(['last_activity' => now()]);
    });
}

Eager Loading Circular References

Another source is circular eager loading in API resources:

// UserResource loads PostResource, PostResource loads UserResource...
class UserResource extends JsonResource {
    public function toArray($request) {
        return [
            'posts' => PostResource::collection($this->posts),
        ];
    }
}

Fix this by conditionally including relations or using whenLoaded():

'posts' => PostResource::collection($this->whenLoaded('posts')),

Bugsly flags these runaway loops quickly — you'll see a spike in memory usage and repeated error events that make the cyclical pattern obvious in the timeline view.