Constants in Classes

Constants in Classes — a practical guide to PHP class constants with clear examples you can reuse in real projects.

OOP Tutorial Series (30/65). Prefer one article? Read the complete OOP tutorial.

Short description

Class constants are useful for statuses, config keys, and fixed options.

Class const

class OrderStatus {
    public const PENDING = 'pending';
    public const PAID = 'paid';
}
echo OrderStatus::PAID;