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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 |
|---|---|
| 168 | 'name' => 'parent', |
| 169 | 'orderby' => 'name', |
| 170 | 'selected' => $tag->parent, |
| 171 | 'exclude_tree' => $tag->term_id, |
| 172 | 'hierarchical' => true, |
| 173 | 'show_option_none' => __( 'None' ), |
| 174 | ); |
| 175 | |
| 176 | /** This filter is documented in wp-admin/edit-tags.php */ |
| 177 | $dropdown_args = apply_filters( 'taxonomy_parent_dropdown_args', $dropdown_args, $taxonomy, 'edit' ); |
| 178 | wp_dropdown_categories( $dropdown_args ); |
| 179 | ?> |
| 180 | <?php if ( 'category' == $taxonomy ) : ?> |
| 181 | <p class="description"><?php _e( 'Categories, unlike tags, can have a hierarchy. You might have a Jazz category, and under that have children categories for Bebop and Big Band. Totally optional.' ); ?></p> |
| 182 | <?php else : ?> |
| 183 | <p class="description"><?php _e( 'Assign a parent term to create a hierarchy. The term Jazz, for example, would be the parent of Bebop and Big Band.' ); ?></p> |
| 184 | <?php endif; ?> |
| 185 | </td> |
| 186 | </tr> |