Help Me Develop a Plugin

well everything is ok for now. I moved the plugin to its own folder and after activating it doesen’t create the new database column. I think there is something wrong actvate_digg_this.php hook…

Is your plugin file digg_this.php?
‘activate_filename.php’ in the hook must meets the actual file name.

Try echo something in the function to see if the function is really being called.

function diggurl_addcolumn () {
die ('hook called');
...

I’ve been struggling a bit with the activate hook as well. I found that changing my plugin file to all lowercase and with no underscores in the name made the activation hook work.

So instead of myPlugin.php or my_plugin.php I had to use myplugin.php and then the add_action( “activate_myplugin.php”, “install_function” ) worked.

I couldn’t find it in the documentation that this was required so I discovered it with trial and error. Granted I’m quite new at this plugin writing stuff so maybe I just missed it being mentioned somewhere.