Question

What are possibilities to implement helper that will raise error log with level E_DEPRECATED (E_USER_DEPRECATED in fact) when class method with annotation @deprecated is called?

For example for the code

/**
 * @deprecated
 */
public function main()
{}

when calling the method $obj->main() the deprecated warning would be raised.

And yes, I know I could add a warning using code line trigger_error().

Answer 1

In short: Put trigger_error() at the beginning of the method.

Long: You need to reflect the class, retrieve the DocComment, parse it and extract the @deprecated-tag. The problem is, that you must do this on every method call, and even if it there exists an easy way to catch every call, it would be a huge overhead.