Static

What it is

Static members belong to the class rather than an instance.

When to use it

Use for stateless helpers or named constructors; avoid global mutable state.

Syntax

public static function fromCents(int $cents): self {}

Example

final class Money
{
    private function __construct(public readonly int $cents) {}
    public static function fromCents(int $cents): self
    {
        return new self($cents);
    }
}
$money = Money::fromCents(1250);

Common mistakes

Static mutable state makes tests and long-lived workers unpredictable.

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