Closure On Constructor

PHP 8.1 introduced first class callable, a syntax to build a closure by using the ellipis operator ... as argument. This works on all sorts of calls, methods, closure, functions.

The only call where it doesn’t work is the instantiation: PHP generates an error from that syntax.

On the other hand, it is possible to create a closure on the constructor method, like any other method. And there, it just calls again the constructor, on the object that was already created.

See Also

• Calling the constructor [Try me]

PHP Error Messages

• Cannot create Closure for new expression

PHP Features

• constructor

• first-class-callable

• method