category_parent == $id ) {
$chain .= $before.$category->cat_ID.$after;
$chain .= get_category_children($category->cat_ID, $before, $after);
}
}
return $chain;
}
function get_category_link($category_id) {
global $wp_rewrite;
$catlink = $wp_rewrite->get_category_permastruct();
if ( empty($catlink) ) {
$file = get_option('home') . '/';
$catlink = $file . '?cat=' . $category_id;
} else {
$category = &get_category($category_id);
$category_nicename = $category->category_nicename;
if ( $parent = $category->category_parent )
$category_nicename = get_category_parents($parent, false, '/', true) . $category_nicename;
$catlink = str_replace('%category%', $category_nicename, $catlink);
$catlink = get_option('home') . user_trailingslashit($catlink, 'category');
}
return apply_filters('category_link', $catlink, $category_id);
}
function get_category_parents($id, $link = FALSE, $separator = '/', $nicename = FALSE){
$chain = '';
$parent = &get_category($id);
if ( $nicename )
$name = $parent->category_nicename;
else
$name = $parent->cat_name;
if ( $parent->category_parent && ($parent->category_parent != $parent->cat_ID) )
$chain .= get_category_parents($parent->category_parent, $link, $separator, $nicename);
if ( $link )
$chain .= 'cat_name) . '">'.$name.'' . $separator;
else
$chain .= $name.$separator;
return $chain;
}
function get_the_category($id = false) {
global $post, $category_cache, $blog_id;
$id = (int) $id;
if ( !$id )
$id = $post->ID;
if ( !isset($category_cache[$blog_id][$id]) )
update_post_category_cache($id);
$categories = $category_cache[$blog_id][$id];
if ( !empty($categories) )
usort($categories, '_get_the_category_usort');
else
$categories = array();
return $categories;
}
function _get_the_category_usort($a, $b) {
return strcmp($a->category_name, $b->category_name);
}
function get_the_category_by_ID($cat_ID) {
$cat_ID = (int) $cat_ID;
$category = &get_category($cat_ID);
return $category->cat_name;
}
function get_the_category_list($separator = '', $parents='') {
global $wp_rewrite;
$categories = get_the_category();
if (empty($categories))
return apply_filters('the_category', __('Uncategorized'), $separator, $parents);
$rel = ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() ) ? 'rel="category tag"' : 'rel="category"';
$thelist = '';
if ( '' == $separator ) {
$thelist .= '';
foreach ( $categories as $category ) {
$thelist .= "\n\t- ";
switch ( strtolower($parents) ) {
case 'multiple':
if ($category->category_parent)
$thelist .= get_category_parents($category->category_parent, TRUE);
$thelist .= 'cat_name) . '" ' . $rel . '>' . $category->cat_name.'
';
break;
case 'single':
$thelist .= 'cat_name) . '" ' . $rel . '>';
if ($category->category_parent)
$thelist .= get_category_parents($category->category_parent, FALSE);
$thelist .= $category->cat_name.'';
break;
case '':
default:
$thelist .= 'cat_name) . '" ' . $rel . '>' . $category->cat_name.'';
}
}
$thelist .= '
';
} else {
$i = 0;
foreach ( $categories as $category ) {
if ( 0 < $i )
$thelist .= $separator . ' ';
switch ( strtolower($parents) ) {
case 'multiple':
if ( $category->category_parent )
$thelist .= get_category_parents($category->category_parent, TRUE);
$thelist .= 'cat_name) . '" ' . $rel . '>' . $category->cat_name.'';
break;
case 'single':
$thelist .= 'cat_name) . '" ' . $rel . '>';
if ( $category->category_parent )
$thelist .= get_category_parents($category->category_parent, FALSE);
$thelist .= "$category->cat_name";
break;
case '':
default:
$thelist .= 'cat_name) . '" ' . $rel . '>' . $category->cat_name.'';
}
++$i;
}
}
return apply_filters('the_category', $thelist, $separator, $parents);
}
function in_category($category) { // Check if the current post is in the given category
global $category_cache, $post, $blog_id;
if ( isset( $category_cache[$blog_id][$post->ID][$category] ) )
return true;
else
return false;
}
function the_category($separator = '', $parents='') {
echo get_the_category_list($separator, $parents);
}
function category_description($category = 0) {
global $cat;
if ( !$category )
$category = $cat;
$category = & get_category($category);
return apply_filters('category_description', $category->category_description, $category->cat_ID);
}
function wp_dropdown_categories($args = '') {
if ( is_array($args) )
$r = &$args;
else
parse_str($args, $r);
$defaults = array('show_option_all' => '', 'show_option_none' => '', 'orderby' => 'ID',
'order' => 'ASC', 'show_last_update' => 0, 'show_count' => 0,
'hide_empty' => 1, 'child_of' => 0, 'exclude' => '', 'echo' => 1,
'selected' => 0, 'hierarchical' => 0, 'name' => 'cat',
'class' => 'postform');
$defaults['selected'] = ( is_category() ) ? get_query_var('cat') : 0;
$r = array_merge($defaults, $r);
$r['include_last_update_time'] = $r['show_last_update'];
extract($r);
$categories = get_categories($r);
$output = '';
if ( ! empty($categories) ) {
$output = "\n";
}
$output = apply_filters('wp_dropdown_cats', $output);
if ( $echo )
echo $output;
return $output;
}
function wp_list_categories($args = '') {
if ( is_array($args) )
$r = &$args;
else
parse_str($args, $r);
$defaults = array('show_option_all' => '', 'orderby' => 'name',
'order' => 'ASC', 'show_last_update' => 0, 'style' => 'list',
'show_count' => 0, 'hide_empty' => 1, 'use_desc_for_title' => 1,
'child_of' => 0, 'feed' => '', 'feed_image' => '', 'exclude' => '',
'hierarchical' => true, 'title_li' => __('Categories'));
$r = array_merge($defaults, $r);
if ( !isset($r['pad_counts']) && $r['show_count'] && $r['hierarchical'] )
$r['pad_counts'] = true;
if ( isset($r['show_date']) )
$r['include_last_update_time'] = $r['show_date'];
extract($r);
$categories = get_categories($r);
$output = '';
if ( $title_li && 'list' == $style )
$output = '' . $r['title_li'] . '';
if ( empty($categories) ) {
if ( 'list' == $style )
$output .= '- ' . __("No categories") . '
';
else
$output .= __("No categories");
} else {
global $wp_query;
if ( is_category() )
$r['current_category'] = $wp_query->get_queried_object_id();
if ( $hierarchical )
$depth = 0; // Walk the full depth.
else
$depth = -1; // Flat.
$output .= walk_category_tree($categories, $depth, $r);
}
if ( $title_li && 'list' == $style )
$output .= '
';
echo apply_filters('wp_list_categories', $output);
}
//
// Helper functions
//
function walk_category_tree() {
$walker = new Walker_Category;
$args = func_get_args();
return call_user_func_array(array(&$walker, 'walk'), $args);
}
function walk_category_dropdown_tree() {
$walker = new Walker_CategoryDropdown;
$args = func_get_args();
return call_user_func_array(array(&$walker, 'walk'), $args);
}
?>