Posted 3 years ago #
When using add_action, you have to insert a hook name. Can this name be any PHP function that's defined and called or what are the guidelines?
The documentation says: hook_name is the name of an action hook provided by WordPress, that tells what event your function should be associated with.
If I can't use any php function name I created, how can I add the name to think action hook name list or what not?
They come in pairs. The add_action function takes a hook name and a function name to call. But it's actually run when there is a do_action call, which specifies the hook name.
So, this code:
add_action('blah','do_something');
do_action('blah');would cause the do_something function to run.
So look for the corresponding do_action to figure out where your hook is called from.
Filters work the same way, with add_filter and apply_filter.
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