How to change the post form from plugin?

Question

I am starting making some wordpress plugin, so I am a beginer. I just wonder how can I change the post form of the pages. For example for adding some other input (of type file or text)? I am trying to use

add_filter('comments_template', 'add_new_fields');

but nothings happens.

Answer 1

If you want to change/add something to post form, you have to deal with meta boxes. I would recommend you to read through these articles:

• Reusable Custom Meta Boxes Part 1: Intro and Basic Fields
• Reusable Custom Meta Boxes Part 2: Advanced Fields
• Reusable Custom Meta Boxes Part 3: Extra Fields
• Reusable Custom Meta Boxes Part 4: Using the Data