PHP: Allow single quote autocomplete + update line comments

[RemcoSmitsDev]

Check for existing issues

• [X] Completed

Describe the feature

When you type a single quote, the editor does not autocomplete this for you because it's missing inside the php/config.toml file. And in PHP, it's also possible to have a single line comment with # as starter point.

If applicable, add mockups / screenshots to help present your vision of the feature

No response