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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 138 | // Also note that you may have post2cat entries with the old cat_ID if this is an update |
| 139 | |
| 140 | if ($update) { |
| 141 | do_action('edit_category', $cat_ID); |
| 142 | } else { |
| 143 | do_action('create_category', $cat_ID); |
| 144 | do_action('add_category', $cat_ID); |
| 145 | } |
| 146 | |
| 147 | $cat_ID = apply_filters('cat_id_filter', $cat_ID, $update); |
| 148 | |
| 149 | clean_category_cache($cat_ID); |
| 150 | |
| 151 | if ($update) |
| 152 | do_action('edited_category', $cat_ID); |
| 153 | else |
| 154 | do_action('created_category', $cat_ID); |
| 155 | |
| 156 | return $cat_ID; |