The What
What makes something callable? What does it mean that a callable is a type hint?
- Valid fully qualified name
- Valid function, closure, or method
- It is accessible (i.e. not set to protected or private)
Callables
Show It in ActionBasic
Let’s show how the callable works and discuss what makes it callable. You will see the full qualified naming with and without namespacing. You’ll also get a basic overview of the look-up tables.
You get WET when you swim. Stay DRY when you code.
Go DeepPro
In this video, you will go deeper into the callable, show you the PHP source code, and discuss the look-up tables including the symbols and function tables.
