Extension Generator in CLI may produce broken PHP for certain extensions

[dougblackjr]

Description of the problem

The CLI add-on generator utilizes the extension hooks in the documentation, some of which are documented as sending in $this as the parameter. The add-on generator uses this in the enum, producing invalid PHP.

For example, I create an extension using the sessions_end hook:

The documentation states that $this is sent in:

However, this is invalid PHP:

How To Reproduce

1. Create an extension on the CLI utilizing a hook that has $this labeled as a parameter in the documentation.
2. Lint the created extension.

Error Messages
PHP Fatal error: Cannot use $this as parameter

Possible Solution
Change $this to $obj in the associated extension hooks.