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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 |
|---|---|
| 63 | $exclusions = ' AND ( cat_ID <> ' . intval($excat) . ' '; |
| 64 | else |
| 65 | $exclusions .= ' AND cat_ID <> ' . intval($excat) . ' '; |
| 66 | // TODO: Exclude children of excluded cats? Note: children are getting excluded |
| 67 | } |
| 68 | } |
| 69 | } |
| 70 | if (!empty($exclusions)) |
| 71 | $exclusions .= ')'; |
| 72 | $exclusions = apply_filters('list_cats_exclusions', $exclusions, $r ); |
| 73 | $where .= $exclusions; |
| 74 | |
| 75 | if ( $hide_empty && !$hierarchical ) { |
| 76 | if ( 'link' == $type ) |
| 77 | $where .= ' AND link_count > 0'; |
| 78 | else |
| 79 | $where .= ' AND category_count > 0'; |
| 80 | } |
| 81 | |