Parle\Lexer::callout

(PECL parle >= 0.7.2)

Parle\Lexer::callout — Define token callback

public function Parle\Lexer::callout(int $id, callable $callback): void

Define a callback to be invoked once lexer encounters a particular token.

id: Token id.
callback: Callable to be invoked. The callable doesn't receive any arguments and its return value is ignored.

No value is returned.