I would like to write a plugin for my site. But I don't know what is necessary to write the plugin. Which editor program is required? I have information about Javascript and php. But do I need a particular pattern to write a specific plugin? Is it possible to edit a plug-in that is currently available? If I do, will I encounter an error? I'm waiting for help from friends who say add-ons. Where do I have to start? Thank you very much in advance
