367 lines
11 KiB
PHP
367 lines
11 KiB
PHP
<?php
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function walk_category_tree() {
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$walker = new Walker_Category;
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$args = func_get_args();
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return call_user_func_array(array(&$walker, 'walk'), $args);
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}
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function walk_category_dropdown_tree() {
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$walker = new Walker_CategoryDropdown;
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$args = func_get_args();
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return call_user_func_array(array(&$walker, 'walk'), $args);
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}
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function get_the_category($id = false) {
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global $post, $category_cache;
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if ( !$id )
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$id = $post->ID;
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if ( !isset($category_cache[$id]) )
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update_post_category_cache($id);
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$categories = $category_cache[$id];
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if ( !empty($categories) )
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sort($categories);
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else
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$categories = array();
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return $categories;
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}
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function get_category_link($category_id) {
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global $wp_rewrite;
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$catlink = $wp_rewrite->get_category_permastruct();
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if ( empty($catlink) ) {
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$file = get_settings('home') . '/';
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$catlink = $file . '?cat=' . $category_id;
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} else {
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$category = &get_category($category_id);
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$category_nicename = $category->category_nicename;
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if ( $parent = $category->category_parent )
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$category_nicename = get_category_parents($parent, false, '/', true) . $category_nicename . '/';
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$catlink = str_replace('%category%', $category_nicename, $catlink);
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$catlink = get_settings('home') . trailingslashit($catlink);
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}
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return apply_filters('category_link', $catlink, $category_id);
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}
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function get_the_category_list($separator = '', $parents='') {
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$categories = get_the_category();
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if (empty($categories))
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return apply_filters('the_category', __('Uncategorized'), $separator, $parents);
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$thelist = '';
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if ( '' == $separator ) {
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$thelist .= '<ul class="post-categories">';
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foreach ( $categories as $category ) {
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$thelist .= "\n\t<li>";
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switch ( strtolower($parents) ) {
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case 'multiple':
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if ($category->category_parent)
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$thelist .= get_category_parents($category->category_parent, TRUE);
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$thelist .= '<a href="' . get_category_link($category->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $category->cat_name) . '" rel="category tag">'.$category->cat_name.'</a></li>';
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break;
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case 'single':
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$thelist .= '<a href="' . get_category_link($category->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $category->cat_name) . ' rel="category tag">';
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if ($category->category_parent)
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$thelist .= get_category_parents($category->category_parent, FALSE);
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$thelist .= $category->cat_name.'</a></li>';
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break;
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case '':
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default:
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$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>';
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}
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}
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$thelist .= '</ul>';
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} else {
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$i = 0;
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foreach ( $categories as $category ) {
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if ( 0 < $i )
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$thelist .= $separator . ' ';
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switch ( strtolower($parents) ) {
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case 'multiple':
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if ( $category->category_parent )
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$thelist .= get_category_parents($category->category_parent, TRUE);
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$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>';
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break;
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case 'single':
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$thelist .= '<a href="' . get_category_link($category->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $category->cat_name) . '" rel="category tag">';
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if ( $category->category_parent )
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$thelist .= get_category_parents($category->category_parent, FALSE);
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$thelist .= "$category->cat_name</a>";
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break;
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case '':
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default:
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$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>';
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}
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++$i;
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}
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}
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return apply_filters('the_category', $thelist, $separator, $parents);
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}
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function the_category($separator = '', $parents='') {
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echo get_the_category_list($separator, $parents);
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}
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function get_the_category_by_ID($cat_ID) {
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$cat_ID = (int) $cat_ID;
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$category = &get_category($cat_ID);
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return $category->cat_name;
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}
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function get_category_parents($id, $link = FALSE, $separator = '/', $nicename = FALSE){
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$chain = '';
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$parent = &get_category($id);
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if ( $nicename )
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$name = $parent->category_nicename;
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else
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$name = $parent->cat_name;
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if ( $parent->category_parent )
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$chain .= get_category_parents($parent->category_parent, $link, $separator, $nicename);
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if ( $link )
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$chain .= '<a href="' . get_category_link($parent->cat_ID) . '" title="' . sprintf(__("View all posts in %s"), $parent->cat_name) . '">'.$name.'</a>' . $separator;
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else
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$chain .= $name.$separator;
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return $chain;
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}
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function get_category_children($id, $before = '/', $after = '') {
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if ( 0 == $id )
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return '';
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$cat_ids = get_all_category_ids();
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foreach ( $cat_ids as $cat_id ) {
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if ( $cat_id == $id)
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continue;
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$category = get_category($cat_id);
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if ( $category->category_parent == $id ) {
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$chain .= $before.$category->cat_ID.$after;
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$chain .= get_category_children($category->cat_ID, $before, $after);
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}
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}
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return $chain;
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}
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function category_description($category = 0) {
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global $cat;
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if ( !$category )
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$category = $cat;
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$category = & get_category($category);
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return apply_filters('category_description', $category->category_description, $category->cat_ID);
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}
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function wp_dropdown_categories($args = '') {
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if ( is_array($args) )
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$r = &$args;
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else
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parse_str($args, $r);
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$defaults = array('show_option_all' => '', 'show_option_none' => '', 'orderby' => 'ID',
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'order' => 'ASC', 'show_last_update' => 0, 'show_count' => 0,
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'hide_empty' => 1, 'child_of' => 0, 'exclude' => '', 'echo' => 1,
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'selected' => 0, 'hierarchical' => 0, 'name' => 'cat',
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'class' => 'postform');
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$r = array_merge($defaults, $r);
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$r['include_last_update_time'] = $r['show_last_update'];
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extract($r);
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$categories = get_categories($r);
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$output = '';
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if ( ! empty($categories) ) {
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$output = "<select name='$name' class='$class'>\n";
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if ( $show_option_all ) {
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$show_option_all = apply_filters('list_cats', $show_option_all);
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$output .= "\t<option value='0'>$show_option_all</option>\n";
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}
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if ( $show_option_none) {
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$show_option_none = apply_filters('list_cats', $show_option_none);
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$output .= "\t<option value='-1'>$show_option_none</option>\n";
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}
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if ( $hierarchical )
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$depth = 0; // Walk the full depth.
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else
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$depth = -1; // Flat.
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$output .= walk_category_dropdown_tree($categories, $depth, $r);
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$output .= "</select>\n";
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}
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$output = apply_filters('wp_dropdown_cats', $output);
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if ( $echo )
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echo $output;
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return $output;
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}
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function wp_list_categories($args = '') {
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if ( is_array($args) )
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$r = &$args;
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else
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parse_str($args, $r);
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$defaults = array('show_option_all' => '', 'orderby' => 'ID',
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'order' => 'asc', 'style' => 'list', 'show_last_update' => 0,
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'show_count' => 0, 'hide_empty' => 1, 'use_desc_for_title' => 1,
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'child_of' => 0, 'feed' => '', 'feed_image' => '', 'exclude' => '',
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'hierarchical' => true, 'title_li' => '');
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$r = array_merge($defaults, $r);
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$r['include_last_update_time'] = $r['show_date'];
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extract($r);
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$categories = get_categories($r);
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$output = '';
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if ( $title_li && $list )
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$output = '<li class="categories">' . $r['title_li'] . '<ul>';
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if ( empty($categories) ) {
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if ( $list)
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$output .= '<li>' . __("No categories") . '</li>';
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else
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$output .= __("No categories");
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} else {
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global $wp_query;
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$r['current_category'] = $wp_query->get_queried_object_id();
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if ( $hierarchical )
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$depth = 0; // Walk the full depth.
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else
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$depth = -1; // Flat.
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$output .= walk_category_tree($categories, $depth, $r);
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}
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if ( $title_li && $list )
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$output .= '</ul></li>';
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echo apply_filters('list_cats', $output);
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}
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function in_category($category) { // Check if the current post is in the given category
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global $category_cache, $post;
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if ( isset( $category_cache[$post->ID][$category] ) )
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return true;
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else
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return false;
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}
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function &_get_cat_children($category_id, $categories) {
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if ( empty($categories) )
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return array();
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$category_list = array();
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foreach ( $categories as $category ) {
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if ( $category->category_parent == $category_id ) {
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$category_list[] = $category;
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if ( $children = _get_cat_children($category->cat_ID, $categories) )
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$category_list = array_merge($category_list, $children);
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}
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}
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return $category_list;
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}
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function &get_categories($args = '') {
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global $wpdb, $category_links;
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if ( is_array($args) )
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$r = &$args;
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else
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parse_str($args, $r);
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$defaults = array('type' => 'post', 'child_of' => 0, 'orderby' => 'name', 'order' => 'ASC',
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'hide_empty' => true, 'include_last_update_time' => false, 'hierarchical' => 1, $exclude => '', $include => '');
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$r = array_merge($defaults, $r);
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$r['orderby'] = "cat_" . $r['orderby']; // restricts order by to cat_ID and cat_name fields
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extract($r);
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$where = 'cat_ID > 0';
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$inclusions = '';
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if ( !empty($include) ) {
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$child_of = 0; //ignore child_of and exclude params if using include
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$exclude = '';
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$incategories = preg_split('/[\s,]+/',$include);
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if ( count($incategories) ) {
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foreach ( $incategories as $incat ) {
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if (empty($inclusions))
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$inclusions = ' AND ( cat_ID = ' . intval($incat) . ' ';
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else
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$inclusions .= ' OR cat_ID = ' . intval($incat) . ' ';
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}
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}
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}
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if (!empty($inclusions))
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$inclusions .= ')';
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$where .= $inclusions;
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$exclusions = '';
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if ( !empty($exclude) ) {
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$excategories = preg_split('/[\s,]+/',$exclude);
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if ( count($excategories) ) {
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foreach ( $excategories as $excat ) {
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if (empty($exclusions))
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$exclusions = ' AND ( cat_ID <> ' . intval($excat) . ' ';
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else
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$exclusions .= ' AND cat_ID <> ' . intval($excat) . ' ';
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// TODO: Exclude children of excluded cats? Note: children are getting excluded
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}
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}
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}
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if (!empty($exclusions))
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$exclusions .= ')';
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$exclusions = apply_filters('list_cats_exclusions', $exclusions );
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$where .= $exclusions;
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$having = '';
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if ( $hide_empty ) {
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if ( 'link' == $type )
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$having = 'HAVING link_count > 0';
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else
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$having = 'HAVING category_count > 0';
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}
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$categories = $wpdb->get_results("SELECT * FROM $wpdb->categories WHERE $where $having ORDER BY $orderby $order");
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if ( empty($categories) )
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return array();
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// TODO: Integrate this into the main query.
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if ( $include_last_update_time ) {
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$stamps = $wpdb->get_results("SELECT category_id, UNIX_TIMESTAMP( MAX(post_date) ) AS ts FROM $wpdb->posts, $wpdb->post2cat, $wpdb->categories
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WHERE post_status = 'publish' AND post_id = ID AND $where GROUP BY category_id");
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global $cat_stamps;
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foreach ($stamps as $stamp)
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$cat_stamps[$stamp->category_id] = $stamp->ts;
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function stamp_cat($cat) {
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global $cat_stamps;
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$cat->last_update_timestamp = $cat_stamps[$cat->cat_ID];
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return $cat;
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}
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$categories = array_map('stamp_cat', $categories);
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unset($cat_stamps);
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}
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if ( $child_of || $hierarchical )
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$categories = & _get_cat_children($child_of, $categories);
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return apply_filters('get_categories', $categories);
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}
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?>
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