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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 |
|---|---|
| 156 | foreach ( $cats as $cat ) { |
| 157 | $result[$cat]['children'] = get_nested_categories( $default, $cat ); |
| 158 | $result[$cat]['cat_ID'] = $cat; |
| 159 | $result[$cat]['checked'] = in_array( $cat, $checked_categories ); |
| 160 | $result[$cat]['cat_name'] = get_the_category_by_ID( $cat ); |
| 161 | } |
| 162 | } |
| 163 | } |
| 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 | |