Type Conversion for method/function parameters

[GokhanKR]

Description

A feature for the object methods. As you know we can declare types in a method. But we can't determine a variable conversion into it.

For example:

class MyString
{
    public static function isNickName( $text ) {
        return preg_match( ... $text );
    }
}

public function myFunction( string{MyString::isNickName} $nickName ) ...

The code above is an example. This is just an idea.

[damianwadley]

Sounds very magical. What's wrong with calling MyString::isNickName yourself? Or using a Nickname class?

[GokhanKR]

I attempt a new approach to managing a method in a class. By employing Reflections, I construct a Restful API that defines the structure of its methods and generates a new file for each one. Clients can pass method parameters when making a request.

I've thought about different ways to handle this.

    namespace MyProject\Controller\Types;

    class DefaultTypes {
        public static function notEmty(string $text) {
            return preg_replace('/\s/', '', $text) !== '';
        }
    }


    namespace MyProject\Controller\Types;

    class MyTypes extends DefaultTypes {
        public static function isUserName(string $userName) 
        {
            return preg_match('/az-AZ-09/', $userName);
        }

        public static function isUserNickName(string $nickName) 
        {
            return preg_match('/az-AZ-09_-/', $nickName);
        }
    }

    // MyController
    class MyController {
        public function updateUser(int $userID, MyTypes{isUserName} $name, MyTypes{isUserNickName, notEmpty} $nickName, string $email, int|string $group, ?array $params = [])
        {
            ...
        }
    }

I utilize ReflectionMethod to oversee property types. I validate each parameter type against the parameter provided.

[damianwadley]

Sounds like a use case for attributes.

[GokhanKR]

Sounds like a use case for attributes.

Yes, it is a useful feature for me. 😄