Why are the source code implementations of some hooks not in the code?

[kimmy-wang]

Why are the source code implementations of some hooks not in the code?

[rhansen]

I do not understand the question. Can you rephrase?

[kimmy-wang]

The source code of some hooks was not found in the code.

[rhansen]

Again, I don't understand the question. How can the code not be found in the code?

[kimmy-wang]

How to insert the text in the figure below as a hyperlink into the document, and click on the text to jump to a link.

[rhansen]

Are you trying to write a plugin to support <a> elements? If so, there are already some plugins that might do what you want (or require a little modification): ep_embedded_hyperlinks2, ep_full_hyperlinks. I have not tried them so I don't know how well they work.