Traits

What it is

Traits reuse method implementations across classes.

When to use it

Use for narrowly shared behavior when composition would add little value.

Syntax

trait HasReference
{
    public function reference(): string { return $this->reference; }
}

Example

class Invoice
{
    use HasReference;
    public function __construct(private string $reference) {}
}

Common mistakes

Traits hide dependencies on host properties; resolve method collisions explicitly.

Related topics