@phpstan-self-out

The @phpstan-self-out tag documents the refined type of $this after a method call, letting PHPStan track how a fluent or mutating method narrows the object's own type. It is defined by the static analyzer PHPStan, which also accepts the alias @phpstan-this-out (see phpstan-this-out-tag.md).

Parsing a @phpstan-self-out tag produces a SelfOutTag instance, carrying the parsed $type alongside the $name and optional $description every Tag already provides.

The same SelfOutTag is produced by @psalm-self-out, which restates the same concept for its tool.

See PHPStan's PHPDoc basics.