WordPress/wp-includes/template-functions-category...

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<?php
function get_the_category($id = false) {
global $post, $category_cache;
if ( !$id )
$id = $post->ID;
if ( !isset($category_cache[$id]) )
update_post_category_cache($id);
$categories = $category_cache[$id];
if ( !empty($categories) )
sort($categories);
else
$categories = array();
return $categories;
}
function get_category_link($category_id) {
global $wp_rewrite;
$catlink = $wp_rewrite->get_category_permastruct();
if ( empty($catlink) ) {
$file = get_settings('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);
$catlink = get_settings('home') . trailingslashit($catlink);
}
return apply_filters('category_link', $catlink, $category_id);
}
function get_the_category_list($separator = '', $parents='') {
$categories = get_the_category();
if (empty($categories))
return apply_filters('the_category', __('Uncategorized'), $separator, $parents);
$thelist = '';
if ( '' == $separator ) {
$thelist .= '<ul class="post-categories">';
foreach ( $categories as $category ) {
$thelist .= "\n\t<li>";
switch ( strtolower($parents) ) {
case 'multiple':
if ($category->category_parent)
$thelist .= get_category_parents($category->category_parent, TRUE);
$thelist .= '<a href="' . get_category_link($category->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $category->cat_name) . '" rel="category tag">'.$category->cat_name.'</a></li>';
break;
case 'single':
$thelist .= '<a href="' . get_category_link($category->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $category->cat_name) . ' rel="category tag">';
if ($category->category_parent)
$thelist .= get_category_parents($category->category_parent, FALSE);
$thelist .= $category->cat_name.'</a></li>';
break;
case '':
default:
$thelist .= '<a href="' . get_category_link($category->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $category->cat_name) . '" rel="category tag">'.$category->cat_name.'</a></li>';
}
}
$thelist .= '</ul>';
} 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);
$thelist .= '<a href="' . get_category_link($category->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $category->cat_name) . '" rel="category tag">'.$category->cat_name.'</a>';
break;
case 'single':
$thelist .= '<a href="' . get_category_link($category->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $category->cat_name) . '" rel="category tag">';
if ( $category->category_parent )
$thelist .= get_category_parents($category->category_parent, FALSE);
$thelist .= "$category->cat_name</a>";
break;
case '':
default:
$thelist .= '<a href="' . get_category_link($category->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $category->cat_name) . '" rel="category tag">'.$category->cat_name.'</a>';
}
++$i;
}
}
return apply_filters('the_category', $thelist, $separator, $parents);
}
function the_category($separator = '', $parents='') {
echo get_the_category_list($separator, $parents);
}
function get_the_category_by_ID($cat_ID) {
$cat_ID = (int) $cat_ID;
$category = &get_category($cat_ID);
return $category->cat_name;
}
function get_category_parents($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 )
$chain .= get_category_parents($parent->category_parent, $link, $separator, $nicename);
if ( $link )
$chain .= '<a href="' . get_category_link($parent->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $parent->cat_name) . '">'.$name.'</a>' . $separator;
else
$chain .= $name.$separator;
return $chain;
}
function get_category_children($id, $before = '/', $after = '') {
if ( 0 == $id )
return '';
$cat_ids = get_all_category_ids();
foreach ( $cat_ids as $cat_id ) {
if ( $cat_id == $id)
continue;
$category = get_category($cat_id);
if ( $category->category_parent == $id ) {
$chain .= $before.$category->cat_ID.$after;
$chain .= get_category_children($category->cat_ID, $before, $after);
}
}
return $chain;
}
function category_description($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, $r);
if ( !isset($r['show_option_all']))
$r['show_option_all'] = '';
if ( !isset($r['show_option_none']))
$r['show_option_none'] = '';
if ( !isset($r['orderby']) )
$r['orderby'] = 'ID';
if ( !isset($r['order']) )
$r['order'] = 'ASC';
if ( !isset($r['show_last_update']) )
$r['show_last_update'] = 0;
if ( !isset($r['show_counts']) )
$r['show_counts'] = 0;
if ( !isset($r['hide_empty']) )
$r['hide_empty'] = 1;
if ( !isset($r['child_of']) )
$r['child_of'] = 0;
if ( !isset($r['exclude']) )
$r['exclude'] = '';
if ( !isset($r['echo']) )
$r['echo'] = 1;
if ( !isset($r['selected']) )
$r['selected'] = 0;
if ( !isset($r['hierarchical']) )
$r['hierarchical'] = 0;
if ( !isset($r['name']) )
$r['name'] = 'cat';
if ( !isset($r['class']) )
$r['class'] = 'postform';
$r['include_last_update_time'] = $r['show_last_update'];
extract($r);
$categories = get_categories($r);
$output = '';
if ( ! empty($categories) ) {
$output = "<select name='$name' class='$class'>\n";
if ( $show_option_all ) {
$show_option_all = apply_filters('list_cats', $show_option_all);
$output .= "\t<option value='0'>$show_option_all</option>\n";
}
if ( $show_option_none) {
$show_option_none = apply_filters('list_cats', $show_option_none);
$output .= "\t<option value='-1'>$show_option_none</option>\n";
}
if ( $hierarchical )
$depth = 0; // Walk the full depth.
else
$depth = -1; // Flat.
$output .= walk_category_tree($categories, $depth, '_category_dropdown_element', '', '', '', $selected, $r);
$output .= "</select>\n";
}
$output = apply_filters('wp_dropdown_cats', $output);
if ( $echo )
echo $output;
return $output;
}
function _category_dropdown_element($output, $category, $depth, $selected, $args) {
$pad = str_repeat('&nbsp;', $depth * 3);
$cat_name = apply_filters('list_cats', $category->cat_name, $category);
$output .= "\t<option value=\"".$category->cat_ID."\"";
if ( $category->cat_ID == $selected )
$output .= ' selected="selected"';
$output .= '>';
$output .= $cat_name;
if ( $args['show_counts'] )
$output .= '&nbsp;&nbsp;('. $category->category_count .')';
if ( $args['show_last_update'] ) {
$format = 'Y-m-d';
$output .= '&nbsp;&nbsp;' . gmdate($format, $category->last_update_timestamp);
}
$output .= "</option>\n";
return $output;
}
function wp_list_cats($args = '') {
return wp_list_categories($args);
}
function wp_list_categories($args = '') {
if ( is_array($args) )
$r = &$args;
else
parse_str($args, $r);
if ( !isset($r['optionall']))
$r['optionall'] = 0;
if ( !isset($r['all']))
$r['all'] = 'All';
if ( !isset($r['sort_column']) )
$r['sort_column'] = 'ID';
if ( !isset($r['sort_order']) )
$r['sort_order'] = 'asc';
if ( !isset($r['file']) )
$r['file'] = '';
if ( !isset($r['list']) )
$r['list'] = true;
if ( !isset($r['optiondates']) )
$r['optiondates'] = 0;
if ( !isset($r['optioncount']) )
$r['optioncount'] = 0;
if ( !isset($r['hide_empty']) )
$r['hide_empty'] = 1;
if ( !isset($r['use_desc_for_title']) )
$r['use_desc_for_title'] = 1;
if ( !isset($r['child_of']) )
$r['child_of'] = 0;
if ( !isset($r['feed']) )
$r['feed'] = '';
if ( !isset($r['feed_image']) )
$r['feed_image'] = '';
if ( !isset($r['exclude']) )
$r['exclude'] = '';
if ( !isset($r['hierarchical']) )
$r['hierarchical'] = false;
if ( !isset($r['title_li']) )
$r['title_li'] = '';
if ( !isset($r['orderby']) )
$r['orderby'] = $r['sort_column'];
if ( !isset($r['order']) )
$r['order'] = $r['sort_order'];
$r['include_last_update_time'] = $r['optiondates'];
extract($r);
$categories = get_categories($r);
$output = '';
if ( $title_li && $list )
$output = '<li class="categories">' . $r['title_li'] . '<ul>';
if ( empty($categories) ) {
if ( $list)
$output .= '<li>' . __("No categories") . '</li>';
else
$output .= __("No categories");
} else {
global $wp_query;
$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, '_category_list_element_start', '_category_list_element_end', '_category_list_level_start', '_category_list_level_end', $current_category, $r);
}
if ( $title_li && $list )
$output .= '</ul></li>';
echo apply_filters('list_cats', $output);
}
function _category_list_level_start($output, $depth, $cat, $args) {
if (! $args['list'])
return $output;
$indent = str_repeat("\t", $depth);
$output .= "$indent<ul class='children'>\n";
return $output;
}
function _category_list_level_end($output, $depth, $cat, $args) {
if (! $args['list'])
return $output;
$indent = str_repeat("\t", $depth);
$output .= "$indent</ul>\n";
return $output;
}
function _category_list_element_start($output, $category, $depth, $current_category, $args) {
extract($args);
$link = '<a href="' . get_category_link($category->cat_ID) . '" ';
if ( $use_desc_for_title == 0 || empty($category->category_description) )
$link .= 'title="'. sprintf(__("View all posts filed under %s"), wp_specialchars($category->cat_name)) . '"';
else
$link .= 'title="' . wp_specialchars(apply_filters('category_description',$category->category_description,$category)) . '"';
$link .= '>';
$link .= apply_filters('list_cats', $category->cat_name, $category).'</a>';
if ( (! empty($feed_image)) || (! empty($feed)) ) {
$link .= ' ';
if ( empty($feed_image) )
$link .= '(';
$link .= '<a href="' . get_category_rss_link(0, $category->cat_ID, $category->category_nicename) . '"';
if ( !empty($feed) ) {
$title = ' title="' . $feed . '"';
$alt = ' alt="' . $feed . '"';
$name = $feed;
$link .= $title;
}
$link .= '>';
if ( !empty($feed_image) )
$link .= "<img src='$feed_image' $alt$title" . ' />';
else
$link .= $name;
$link .= '</a>';
if (empty($feed_image))
$link .= ')';
}
if ( intval($optioncount) == 1 )
$link .= ' ('.intval($category->category_count).')';
if ( $optiondates ) {
if ( $optiondates == 1 )
$optiondates = 'Y-m-d';
$link .= ' ' . gmdate($optiondates,$category->last_update_timestamp);
}
if ( $list ) {
$output .= "\t<li";
if ( ($category->cat_ID == $current_category) && is_category() )
$output .= ' class="current-cat"';
$output .= ">$link\n";
} else {
$output .= "\t$link<br />\n";
}
return $output;
}
function _category_list_element_end($output, $category, $depth, $cat, $args) {
if (! $args['list'])
return $output;
$output .= "</li>\n";
return $output;
}
function in_category($category) { // Check if the current post is in the given category
global $category_cache, $post;
if ( isset( $category_cache[$post->ID][$category] ) )
return true;
else
return false;
}
function &_get_cat_children($category_id, $categories) {
if ( empty($categories) )
return array();
$category_list = array();
foreach ( $categories as $category ) {
if ( $category->category_parent == $category_id ) {
$category_list[] = $category;
if ( $children = _get_cat_children($category->cat_ID, $categories) )
$category_list = array_merge($category_list, $children);
}
}
return $category_list;
}
function &get_categories($args = '') {
global $wpdb, $category_links;
if ( is_array($args) )
$r = &$args;
else
parse_str($args, $r);
if ( !isset($r['type']) ) // 'post' or 'link'
$r['type'] = 'post';
if ( !isset($r['child_of']) )
$r['child_of'] = 0;
if ( !isset($r['orderby']) )
$r['orderby'] = 'name';
if ( !isset($r['order']) )
$r['order'] = 'ASC';
if ( !isset($r['hide_empty']) )
$r['hide_empty'] = true;
if ( !isset($r['include_last_update_time']) )
$r['include_last_update_time'] = false;
if ( !isset($r['hierarchical']) )
$r['hierarchical'] = 1;
$r['orderby'] = "cat_" . $r['orderby'];
extract($r);
$exclusions = '';
$having = '';
$where = 'cat_ID > 0';
$exclusions = '';
if ( !empty($exclude) ) {
$excategories = preg_split('/[\s,]+/',$exclude);
if ( count($excategories) ) {
foreach ( $excategories as $excat ) {
$exclusions .= ' AND cat_ID <> ' . intval($excat) . ' ';
// TODO: Exclude children of excluded cats?
}
}
}
$exclusions = apply_filters('list_cats_exclusions', $exclusions );
$where .= $exclusions;
if ( $hide_empty ) {
if ( 'link' == $type )
$having = 'HAVING link_count > 0';
else
$having = 'HAVING category_count > 0';
}
$categories = $wpdb->get_results("SELECT * FROM $wpdb->categories WHERE $where $having ORDER BY $orderby $order");
if ( empty($categories) )
return array();
// TODO: Integrate this into the main query.
if ( $include_last_update_time ) {
$stamps = $wpdb->get_results("SELECT category_id, UNIX_TIMESTAMP( MAX(post_date) ) AS ts FROM $wpdb->posts, $wpdb->post2cat, $wpdb->categories
WHERE post_status = 'publish' AND post_id = ID AND $where GROUP BY category_id");
global $cat_stamps;
foreach ($stamps as $stamp)
$cat_stamps[$stamp->category_id] = $stamp->ts;
function stamp_cat($cat) {
global $cat_stamps;
$cat->last_update_timestamp = $cat_stamps[$cat->cat_ID];
return $cat;
}
$categories = array_map('stamp_cat', $categories);
unset($cat_stamps);
}
if ( $child_of || $hierarchical )
$categories = & _get_cat_children($child_of, $categories);
return $categories;
}
?>