Laravel Clones Your Models Behind Your Back — And It Can Break Your Production Logic

After years with Laravel, I believed this:

    $user = User::find(1);
    $anotherUser = $user;

Both variables point to the same model instance.

Normal PHP behavior.

But then I noticed something strange.

Inside certain Laravel operations…
models are silently cloned.

And that changes everything.

😳 The Hidden Clone in Eloquent

When you run:

    $users = User::where('active', 1)->get();

Internally, Eloquent:

1. Creates a base model

2. Hydrates rows

3. Clones model instances per row

But here’s the deeper layer 👇

When you use:

    $query = User::query();
    $query2 = clone $query;

Laravel heavily relies on cloning the Builder and sometimes the Model state.

🤯 The Real Production Issue

Consider this:

    class User extends Model
    {
        protected static int $counter = 0;
        protected static function booted()
        {
            static::retrieved(function ($model) {
                self::$counter++;
            });
        }
    }

Now:

    User::where('active', 1)->get();

You expect:

• One counter increment per actual DB row.

Correct.

But now introduce:

    $users = User::where('active', 1);
    $admins = (clone $users)->where('role', 'admin')->get();
    $customers = (clone $users)->where('role', 'customer')->get();

You just cloned the builder.

Each clone:

• Rebuilds internal state

• Reapplies scopes

• Re-triggers model hydration

If you rely on static state, caching, or boot flags…

You can introduce invisible duplication bugs.

💥 The Real “Undocumented” Detail

Inside Illuminate\Database\Eloquent\Builder:

Laravel overrides __clone().

When cloned:

• It clones the underlying query builder

• It resets certain properties

• It detaches eager loads in specific scenarios

This means:

Builder cloning is not shallow.
It mutates execution behavior.

Most developers never read this.

😱 Where This Breaks Real Systems

1. Multi-tenant systems

2. Dynamic global scopes

3. Stateful singletons injected into models

4. Caching inside model properties

5. Complex query macros

Example subtle bug:

    User::addGlobalScope('active', function ($builder) {
        $builder->where('active', 1);
    });

If you dynamically remove scopes:

    $query = User::query();
    $query->withoutGlobalScopes();

Then clone:

    $clone = clone $query;

Depending on timing, scopes may or may not reapply.

That inconsistency is terrifying in production.

🧠 The Senior-Level Insight

Laravel treats:

• Models as blueprints

• Builders as mutable state machines

Cloning is used to:

• Preserve immutability illusion

• Avoid cross-query contamination

But if you inject state into:

• Static properties

• Singletons

• Runtime flags

You are now fighting the framework.

✅ What Advanced Developers Should Do

• Never rely on static state in models

• Avoid hidden caching inside model properties

• Be careful when cloning builders

• Read Builder::__clone() once

• Treat Eloquent as stateless

🔥 The Truth

Laravel feels magical because it hides complexity.

But behind that magic:

• Cloning

• State mutation

• Scope reapplication

• Hydration cycles

Are constantly happening.

And if you design assuming “simple object lifecycle”…

You will eventually ship a ghost bug.

Read this : Laravel Executes Your Code in a Different Order Than You Think — I Found This After a Production Bug