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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.
This hook occurs 3 times in this file.
| Line | Code |
|---|---|
| 164 | |
| 165 | $result = apply_filters('get_nested_categories', $result); |
| 166 | usort( $result, 'sort_cats' ); |
| 167 | |
| 168 | return $result; |
| 169 | } |
| 170 | |
| 171 | function write_nested_categories( $categories ) { |
| 172 | foreach ( $categories as $category ) { |
| 173 | echo "\n", '<li id="category-', $category['cat_ID'], '"><label for="in-category-', $category['cat_ID'], '" class="selectit"><input value="', $category['cat_ID'], '" type="checkbox" name="post_category[]" id="in-category-', $category['cat_ID'], '"', ($category['checked'] ? ' checked="checked"' : "" ), '/> ', wp_specialchars( apply_filters('the_category', $category['cat_name'] )), '</label>'; |
| 174 | |
| 175 | if ( $category['children'] ) { |
| 176 | echo "\n<ul>"; |
| 177 | write_nested_categories( $category['children'] ); |
| 178 | echo "\n</ul>"; |
| 179 | } |
| 180 | echo '</li>'; |
| 181 | } |
| 182 | } |
| Line | Code |
| 189 | $categories = get_terms( $taxonomy, array( 'orderby' => 'count', 'order' => 'DESC', 'number' => $number ) ); |
| 190 | |
| 191 | foreach ( (array) $categories as $category ) { |
| 192 | $id = "popular-category-$category->term_id"; |
| 193 | ?> |
| 194 | |
| 195 | <li id="<?php echo $id; ?>" > |
| 196 | <label class="selectit" for="in-<?php echo $id; ?>"> |
| 197 | <input id="in-<?php echo $id; ?>" type="checkbox" value="<?php echo (int) $category->term_id; ?>" /> |
| 198 | <?php echo wp_specialchars( apply_filters( 'the_category', $category->name ) ); ?> |
| 199 | </label> |
| 200 | </li> |
| 201 | |
| 202 | <?php |
| 203 | } |
| 204 | } |
| 205 | |
| 206 | function dropdown_link_categories( $default = 0 ) { |
| 207 | global $link_id; |
| Line | Code |
| 218 | } |
| 219 | |
| 220 | $categories = get_terms('link_category', 'orderby=count&hide_empty=0'); |
| 221 | |
| 222 | if ( empty($categories) ) |
| 223 | return; |
| 224 | |
| 225 | foreach ( $categories as $category ) { |
| 226 | $cat_id = $category->term_id; |
| 227 | $name = wp_specialchars( apply_filters('the_category', $category->name)); |
| 228 | $checked = in_array( $cat_id, $checked_categories ); |
| 229 | echo '<li id="link-category-', $cat_id, '"><label for="in-link-category-', $cat_id, '" class="selectit"><input value="', $cat_id, '" type="checkbox" name="link_category[]" id="in-link-category-', $cat_id, '"', ($checked ? ' checked="checked"' : "" ), '/> ', $name, "</label></li>"; |
| 230 | } |
| 231 | } |
| 232 | |
| 233 | // Tag stuff |
| 234 | |
| 235 | // Returns a single tag row (see tag_rows below) |
| 236 | // Note: this is also used in admin-ajax.php! |