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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 2 times in this file.
| Line | Code |
|---|---|
| 168 | $previouscat = $currentcat; |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | function category_description($category = 0) { |
| 173 | global $cat; |
| 174 | if ( !$category ) |
| 175 | $category = $cat; |
| 176 | $category = & get_category($category); |
| 177 | return apply_filters('category_description', $category->category_description, $category->cat_ID); |
| 178 | } |
| 179 | |
| 180 | // out of the WordPress loop |
| 181 | function dropdown_cats($optionall = 1, $all = 'All', $sort_column = 'ID', $sort_order = 'asc', |
| 182 | $optiondates = 0, $optioncount = 0, $hide_empty = 1, $optionnone=FALSE, |
| 183 | $selected=0, $hide=0) { |
| 184 | global $wpdb; |
| 185 | if ( ($file == 'blah') || ($file == '') ) |
| 186 | $file = get_settings('home') . '/'; |
| Line | Code |
| 319 | $thelist = ""; |
| 320 | |
| 321 | foreach ( $categories as $category ) { |
| 322 | if ( ( intval($hide_empty) == 0 || $category->category_count) && (!$hierarchical || $category->category_parent == $child_of) ) { |
| 323 | $num_found++; |
| 324 | $link = '<a href="'.get_category_link($category->cat_ID).'" '; |
| 325 | if ( $use_desc_for_title == 0 || empty($category->category_description) ) |
| 326 | $link .= 'title="'. sprintf(__("View all posts filed under %s"), wp_specialchars($category->cat_name)) . '"'; |
| 327 | else |
| 328 | $link .= 'title="' . wp_specialchars(apply_filters('category_description',$category->category_description,$category)) . '"'; |
| 329 | $link .= '>'; |
| 330 | $link .= apply_filters('list_cats', $category->cat_name, $category).'</a>'; |
| 331 | |
| 332 | if ( (! empty($feed_image)) || (! empty($feed)) ) { |
| 333 | |
| 334 | $link .= ' '; |
| 335 | |
| 336 | if ( empty($feed_image) ) |
| 337 | $link .= '('; |