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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 |
|---|---|
| 209 | $cats = wp_get_link_cats($link_id); |
| 210 | if ( 1 == count($cats) ) |
| 211 | $cats = array($default_link_cat); |
| 212 | else |
| 213 | $cats = array_diff($cats, array($cat_ID)); |
| 214 | wp_set_link_cats($link_id, $cats); |
| 215 | } |
| 216 | |
| 217 | clean_category_cache($cat_ID); |
| 218 | do_action('delete_category', $cat_ID); |
| 219 | return 1; |
| 220 | } |
| 221 | |
| 222 | function wp_create_category($cat_name) { |
| 223 | $cat_array = compact('cat_name'); |
| 224 | return wp_insert_category($cat_array); |
| 225 | } |
| 226 | |
| 227 | function wp_create_categories($categories, $post_id = '') { |