917 lines
28 KiB
PHP
917 lines
28 KiB
PHP
<?php
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/**
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* Category Template Tags and API.
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*
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* @package WordPress
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* @subpackage Template
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*/
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/**
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* Retrieve category children list separated before and after the term IDs.
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*
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* @since 1.2.0
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*
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* @param int $id Category ID to retrieve children.
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* @param string $before Optional. Prepend before category term ID.
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* @param string $after Optional, default is empty string. Append after category term ID.
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* @param array $visited Optional. Category Term IDs that have already been added.
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* @return string
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*/
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function get_category_children( $id, $before = '/', $after = '', $visited = array() ) {
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if ( 0 == $id )
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return '';
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$chain = '';
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/** TODO: consult hierarchy */
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$cat_ids = get_all_category_ids();
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foreach ( (array) $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 ( is_wp_error( $category ) )
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return $category;
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if ( $category->parent == $id && !in_array( $category->term_id, $visited ) ) {
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$visited[] = $category->term_id;
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$chain .= $before.$category->term_id.$after;
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$chain .= get_category_children( $category->term_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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/**
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* Retrieve category link URL.
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*
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* @since 1.0.0
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* @uses apply_filters() Calls 'category_link' filter on category link and category ID.
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*
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* @param int $category_id Category ID.
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* @return string
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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_option( '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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if ( is_wp_error( $category ) )
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return $category;
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$category_nicename = $category->slug;
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if ( $parent = $category->parent )
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$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_option( 'home' ) . user_trailingslashit( $catlink, 'category' );
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}
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return apply_filters( 'category_link', $catlink, $category_id );
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}
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/**
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* Retrieve category parents with separator.
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*
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* @since 1.2.0
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*
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* @param int $id Category ID.
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* @param bool $link Optional, default is false. Whether to format with link.
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* @param string $separator Optional, default is '/'. How to separate categories.
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* @param bool $nicename Optional, default is false. Whether to use nice name for display.
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* @param array $visited Optional. Already linked to categories to prevent duplicates.
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* @return string
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*/
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function get_category_parents( $id, $link = false, $separator = '/', $nicename = false, $visited = array() ) {
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$chain = '';
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$parent = &get_category( $id );
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if ( is_wp_error( $parent ) )
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return $parent;
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if ( $nicename )
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$name = $parent->slug;
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else
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$name = $parent->cat_name;
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if ( $parent->parent && ( $parent->parent != $parent->term_id ) && !in_array( $parent->parent, $visited ) ) {
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$visited[] = $parent->parent;
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$chain .= get_category_parents( $parent->parent, $link, $separator, $nicename, $visited );
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}
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if ( $link )
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$chain .= '<a href="' . get_category_link( $parent->term_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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/**
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* Retrieve post categories.
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*
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* @since 0.71
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* @uses $post
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*
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* @param int $id Optional, default to current post ID. The post ID.
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* @return array
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*/
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function get_the_category( $id = false ) {
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global $post;
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$id = (int) $id;
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if ( !$id )
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$id = (int) $post->ID;
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$categories = get_object_term_cache( $id, 'category' );
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if ( false === $categories )
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$categories = wp_get_object_terms( $id, 'category' );
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if ( !empty( $categories ) )
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usort( $categories, '_usort_terms_by_name' );
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else
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$categories = array();
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foreach ( (array) array_keys( $categories ) as $key ) {
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_make_cat_compat( $categories[$key] );
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}
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return $categories;
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}
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/**
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* Sort categories by name.
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*
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* Used by usort() as a callback, should not be used directly. Can actually be
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* used to sort any term object.
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*
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* @since 2.3.0
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* @access private
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*
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* @param object $a
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* @param object $b
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* @return int
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*/
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function _usort_terms_by_name( $a, $b ) {
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return strcmp( $a->name, $b->name );
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}
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/**
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* Sort categories by ID.
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*
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* Used by usort() as a callback, should not be used directly. Can actually be
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* used to sort any term object.
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*
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* @since 2.3.0
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* @access private
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*
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* @param object $a
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* @param object $b
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* @return int
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*/
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function _usort_terms_by_ID( $a, $b ) {
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if ( $a->term_id > $b->term_id )
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return 1;
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elseif ( $a->term_id < $b->term_id )
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return -1;
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else
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return 0;
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}
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/**
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* Retrieve category name based on category ID.
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*
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* @since 0.71
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*
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* @param int $cat_ID Category ID.
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* @return string Category name.
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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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if ( is_wp_error( $category ) )
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return $category;
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return $category->name;
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}
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/**
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* Retrieve category list in either HTML list or custom format.
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*
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* @since 1.5.1
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*
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* @param string $separator Optional, default is empty string. Separator for between the categories.
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* @param string $parents Optional. How to display the parents.
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* @param int $post_id Optional. Post ID to retrieve categories.
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* @return string
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*/
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function get_the_category_list( $separator = '', $parents='', $post_id = false ) {
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global $wp_rewrite;
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$categories = get_the_category( $post_id );
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if ( empty( $categories ) )
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return apply_filters( 'the_category', __( 'Uncategorized' ), $separator, $parents );
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$rel = ( is_object( $wp_rewrite ) && $wp_rewrite->using_permalinks() ) ? 'rel="category tag"' : 'rel="category"';
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$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 ( $category->parent )
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$thelist .= get_category_parents( $category->parent, true, $separator );
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$thelist .= '<a href="' . get_category_link( $category->term_id ) . '" title="' . sprintf( __( "View all posts in %s" ), $category->name ) . '" ' . $rel . '>' . $category->name.'</a></li>';
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break;
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case 'single':
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$thelist .= '<a href="' . get_category_link( $category->term_id ) . '" title="' . sprintf( __( "View all posts in %s" ), $category->name ) . '" ' . $rel . '>';
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if ( $category->parent )
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$thelist .= get_category_parents( $category->parent, false, $separator );
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$thelist .= $category->name.'</a></li>';
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break;
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case '':
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default:
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$thelist .= '<a href="' . get_category_link( $category->term_id ) . '" title="' . sprintf( __( "View all posts in %s" ), $category->name ) . '" ' . $rel . '>' . $category->cat_name.'</a></li>';
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}
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}
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$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 ( $category->parent )
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$thelist .= get_category_parents( $category->parent, true, $separator );
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$thelist .= '<a href="' . get_category_link( $category->term_id ) . '" title="' . sprintf( __( "View all posts in %s" ), $category->name ) . '" ' . $rel . '>' . $category->cat_name.'</a>';
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break;
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case 'single':
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$thelist .= '<a href="' . get_category_link( $category->term_id ) . '" title="' . sprintf( __( "View all posts in %s" ), $category->name ) . '" ' . $rel . '>';
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if ( $category->parent )
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$thelist .= get_category_parents( $category->parent, false, $separator );
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$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->term_id ) . '" title="' . sprintf( __( "View all posts in %s" ), $category->name ) . '" ' . $rel . '>' . $category->name.'</a>';
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}
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++$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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/**
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* Checks whether the current post is within a particular category.
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*
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* This function checks to see if the post is within the supplied category. The
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* category can be specified by number or name and will be checked as a name
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* first to allow for categories with numeric names. Note: Prior to v2.5 of
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* WordPress category names were not supported.
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*
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* @since 1.2.0
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*
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* @param int|string $category Category ID or category name.
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* @return bool True, if the post is in the supplied category.
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*/
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function in_category( $category ) {
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global $post;
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if ( empty( $category ) )
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return false;
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// If category is not an int, check to see if it's a name
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if ( ! is_int( $category ) ) {
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$cat_ID = get_cat_ID( $category );
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if ( $cat_ID )
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$category = $cat_ID;
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}
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$categories = get_object_term_cache( $post->ID, 'category' );
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if ( false !== $categories ) {
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if ( array_key_exists( $category, $categories ) )
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return true;
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else
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return false;
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}
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$categories = wp_get_object_terms( $post->ID, 'category', 'fields=ids' );
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if ( is_array($categories) && in_array($category, $categories) )
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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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/**
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* Display the category list for the post.
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*
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* @since 0.71
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*
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* @param string $separator Optional, default is empty string. Separator for between the categories.
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* @param string $parents Optional. How to display the parents.
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* @param int $post_id Optional. Post ID to retrieve categories.
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*/
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function the_category( $separator = '', $parents='', $post_id = false ) {
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echo get_the_category_list( $separator, $parents, $post_id );
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}
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/**
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* Retrieve category description.
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*
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* @since 1.0.0
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*
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* @param int $category Optional. Category ID. Will use global category ID by default.
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* @return string Category description, available.
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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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return get_term_field( 'description', $category, 'category' );
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}
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/**
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* Display or retrieve the HTML dropdown list of categories.
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*
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* The list of arguments is below:
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* 'show_option_all' (string) - Text to display for showing all categories.
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* 'show_option_none' (string) - Text to display for showing no categories.
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* 'orderby' (string) default is 'ID' - What column to use for ordering the
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* categories.
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* 'order' (string) default is 'ASC' - What direction to order categories.
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* 'show_last_update' (bool|int) default is 0 - See {@link get_categories()}
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* 'show_count' (bool|int) default is 0 - Whether to show how many posts are
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* in the category.
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* 'hide_empty' (bool|int) default is 1 - Whether to hide categories that
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* don't have any posts attached to them.
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* 'child_of' (int) default is 0 - See {@link get_categories()}.
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* 'exclude' (string) - See {@link get_categories()}.
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* 'echo' (bool|int) default is 1 - Whether to display or retrieve content.
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* 'depth' (int) - The max depth.
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* 'tab_index' (int) - Tab index for select element.
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* 'name' (string) - The name attribute value for selected element.
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* 'class' (string) - The class attribute value for selected element.
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* 'selected' (int) - Which category ID is selected.
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*
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* The 'hierarchical' argument, which is disabled by default, will override the
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* depth argument, unless it is true. When the argument is false, it will
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* display all of the categories. When it is enabled it will use the value in
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* the 'depth' argument.
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*
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* @since 2.1.0
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*
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* @param string|array $args Optional. Override default arguments.
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* @return string HTML content only if 'echo' argument is 0.
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*/
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function wp_dropdown_categories( $args = '' ) {
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$defaults = array(
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'show_option_all' => '', 'show_option_none' => '',
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'orderby' => 'ID', 'order' => 'ASC',
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'show_last_update' => 0, 'show_count' => 0,
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'hide_empty' => 1, 'child_of' => 0,
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'exclude' => '', 'echo' => 1,
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'selected' => 0, 'hierarchical' => 0,
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'name' => 'cat', 'class' => 'postform',
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'depth' => 0, 'tab_index' => 0
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);
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$defaults['selected'] = ( is_category() ) ? get_query_var( 'cat' ) : 0;
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$r = wp_parse_args( $args, $defaults );
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$r['include_last_update_time'] = $r['show_last_update'];
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extract( $r );
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$tab_index_attribute = '';
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if ( (int) $tab_index > 0 )
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$tab_index_attribute = " tabindex=\"$tab_index\"";
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$categories = get_categories( $r );
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$output = '';
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if ( ! empty( $categories ) ) {
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$output = "<select name='$name' id='$name' class='$class' $tab_index_attribute>\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 = $r['depth']; // Walk the full depth.
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else
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$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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|
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if ( $echo )
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echo $output;
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|
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return $output;
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}
|
|
|
|
/**
|
|
* Display or retrieve the HTML list of categories.
|
|
*
|
|
* The list of arguments is below:
|
|
* 'show_option_all' (string) - Text to display for showing all categories.
|
|
* 'orderby' (string) default is 'ID' - What column to use for ordering the
|
|
* categories.
|
|
* 'order' (string) default is 'ASC' - What direction to order categories.
|
|
* 'show_last_update' (bool|int) default is 0 - See {@link
|
|
* walk_category_dropdown_tree()}
|
|
* 'show_count' (bool|int) default is 0 - Whether to show how many posts are
|
|
* in the category.
|
|
* 'hide_empty' (bool|int) default is 1 - Whether to hide categories that
|
|
* don't have any posts attached to them.
|
|
* 'use_desc_for_title' (bool|int) default is 1 - Whether to use the
|
|
* description instead of the category title.
|
|
* 'feed' - See {@link get_categories()}.
|
|
* 'feed_type' - See {@link get_categories()}.
|
|
* 'feed_image' - See {@link get_categories()}.
|
|
* 'child_of' (int) default is 0 - See {@link get_categories()}.
|
|
* 'exclude' (string) - See {@link get_categories()}.
|
|
* 'echo' (bool|int) default is 1 - Whether to display or retrieve content.
|
|
* 'current_category' (int) - See {@link get_categories()}.
|
|
* 'hierarchical' (bool) - See {@link get_categories()}.
|
|
* 'title_li' (string) - See {@link get_categories()}.
|
|
* 'depth' (int) - The max depth.
|
|
*
|
|
* @since 2.1.0
|
|
*
|
|
* @param string|array $args Optional. Override default arguments.
|
|
* @return string HTML content only if 'echo' argument is 0.
|
|
*/
|
|
function wp_list_categories( $args = '' ) {
|
|
$defaults = array(
|
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'show_option_all' => '', 'orderby' => 'name',
|
|
'order' => 'ASC', 'show_last_update' => 0,
|
|
'style' => 'list', 'show_count' => 0,
|
|
'hide_empty' => 1, 'use_desc_for_title' => 1,
|
|
'child_of' => 0, 'feed' => '', 'feed_type' => '',
|
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'feed_image' => '', 'exclude' => '', 'current_category' => 0,
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|
'hierarchical' => true, 'title_li' => __( 'Categories' ),
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'echo' => 1, 'depth' => 0
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);
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$r = wp_parse_args( $args, $defaults );
|
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|
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if ( !isset( $r['pad_counts'] ) && $r['show_count'] && $r['hierarchical'] ) {
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$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 = '<li class="categories">' . $r['title_li'] . '<ul>';
|
|
|
|
if ( empty( $categories ) ) {
|
|
if ( 'list' == $style )
|
|
$output .= '<li>' . __( "No categories" ) . '</li>';
|
|
else
|
|
$output .= __( "No categories" );
|
|
} else {
|
|
global $wp_query;
|
|
|
|
if( !empty( $show_option_all ) )
|
|
if ( 'list' == $style )
|
|
$output .= '<li><a href="' . get_bloginfo( 'url' ) . '">' . $show_option_all . '</a></li>';
|
|
else
|
|
$output .= '<a href="' . get_bloginfo( 'url' ) . '">' . $show_option_all . '</a>';
|
|
|
|
if ( empty( $r['current_category'] ) && is_category() )
|
|
$r['current_category'] = $wp_query->get_queried_object_id();
|
|
|
|
if ( $hierarchical )
|
|
$depth = $r['depth'];
|
|
else
|
|
$depth = -1; // Flat.
|
|
|
|
$output .= walk_category_tree( $categories, $depth, $r );
|
|
}
|
|
|
|
if ( $title_li && 'list' == $style )
|
|
$output .= '</ul></li>';
|
|
|
|
$output = apply_filters( 'wp_list_categories', $output );
|
|
|
|
if ( $echo )
|
|
echo $output;
|
|
else
|
|
return $output;
|
|
}
|
|
|
|
/**
|
|
* Display tag cloud.
|
|
*
|
|
* The text size is set by the 'smallest' and 'largest' arguments, which will
|
|
* use the 'unit' argument value for the CSS text size unit. The 'format'
|
|
* argument can be 'flat' (default), 'list', or 'array'. The flat value for the
|
|
* 'format' argument will separate tags with spaces. The list value for the
|
|
* 'format' argument will format the tags in a UL HTML list. The array value for
|
|
* the 'format' argument will return in PHP array type format.
|
|
*
|
|
* The 'orderby' argument will accept 'name' or 'count' and defaults to 'name'.
|
|
* The 'order' is the direction to sort, defaults to 'ASC' and can be 'DESC'.
|
|
*
|
|
* The 'number' argument is how many tags to return. By default, the limit will
|
|
* be to return the top 45 tags in the tag cloud list.
|
|
*
|
|
* The 'single_text' and 'multiple_text' arguments are used for the link title
|
|
* for the tag link. If the tag only has one, it will use the text in the
|
|
* 'single_text' or if it has more than one it will use 'multiple_text' instead.
|
|
*
|
|
* The 'exclude' and 'include' arguments are used for the {@link get_tags()}
|
|
* function. Only one should be used, because only one will be used and the
|
|
* other ignored, if they are both set.
|
|
*
|
|
* @since 2.3.0
|
|
*
|
|
* @param array|string $args Optional. Override default arguments.
|
|
* @return array Generated tag cloud, only if no failures and 'array' is set for the 'format' argument.
|
|
*/
|
|
function wp_tag_cloud( $args = '' ) {
|
|
$defaults = array(
|
|
'smallest' => 8, 'largest' => 22, 'unit' => 'pt', 'number' => 45,
|
|
'format' => 'flat', 'orderby' => 'name', 'order' => 'ASC',
|
|
'exclude' => '', 'include' => '', 'link' => 'view'
|
|
);
|
|
$args = wp_parse_args( $args, $defaults );
|
|
|
|
$tags = get_tags( array_merge( $args, array( 'orderby' => 'count', 'order' => 'DESC' ) ) ); // Always query top tags
|
|
|
|
if ( empty( $tags ) )
|
|
return;
|
|
|
|
foreach ( $tags as $key => $tag ) {
|
|
if ( 'edit' == $args['link'] )
|
|
$link = get_edit_tag_link( $tag->term_id );
|
|
else
|
|
$link = get_tag_link( $tag->term_id );
|
|
if ( is_wp_error( $link ) )
|
|
return false;
|
|
|
|
$tags[ $key ]->link = $link;
|
|
$tags[ $key ]->id = $tag->term_id;
|
|
}
|
|
|
|
$return = wp_generate_tag_cloud( $tags, $args ); // Here's where those top tags get sorted according to $args
|
|
|
|
$return = apply_filters( 'wp_tag_cloud', $return, $args );
|
|
|
|
if ( 'array' == $args['format'] )
|
|
return $return;
|
|
|
|
echo $return;
|
|
}
|
|
|
|
/**
|
|
* Generates a tag cloud (heatmap) from provided data.
|
|
*
|
|
* The text size is set by the 'smallest' and 'largest' arguments, which will
|
|
* use the 'unit' argument value for the CSS text size unit. The 'format'
|
|
* argument can be 'flat' (default), 'list', or 'array'. The flat value for the
|
|
* 'format' argument will separate tags with spaces. The list value for the
|
|
* 'format' argument will format the tags in a UL HTML list. The array value for
|
|
* the 'format' argument will return in PHP array type format.
|
|
*
|
|
* The 'orderby' argument will accept 'name' or 'count' and defaults to 'name'.
|
|
* The 'order' is the direction to sort, defaults to 'ASC' and can be 'DESC' or
|
|
* 'RAND'.
|
|
*
|
|
* The 'number' argument is how many tags to return. By default, the limit will
|
|
* be to return the entire tag cloud list.
|
|
*
|
|
* The 'single_text' and 'multiple_text' arguments are used for the link title
|
|
* for the tag link. If the tag only has one, it will use the text in the
|
|
* 'single_text' or if it has more than one it will use 'multiple_text' instead.
|
|
*
|
|
* @todo Complete functionality.
|
|
* @since 2.3.0
|
|
*
|
|
* @param array $tags List of tags.
|
|
* @param string|array $args Optional, override default arguments.
|
|
* @return string
|
|
*/
|
|
function wp_generate_tag_cloud( $tags, $args = '' ) {
|
|
global $wp_rewrite;
|
|
$defaults = array(
|
|
'smallest' => 8, 'largest' => 22, 'unit' => 'pt', 'number' => 0,
|
|
'format' => 'flat', 'orderby' => 'name', 'order' => 'ASC',
|
|
'single_text' => '%d topic', 'multiple_text' => '%d topics'
|
|
);
|
|
$args = wp_parse_args( $args, $defaults );
|
|
extract( $args );
|
|
|
|
if ( empty( $tags ) )
|
|
return;
|
|
|
|
// SQL cannot save you; this is a second (potentially different) sort on a subset of data.
|
|
if ( 'name' == $orderby )
|
|
uasort( $tags, create_function('$a, $b', 'return strnatcasecmp($a->name, $b->name);') );
|
|
else
|
|
uasort( $tags, create_function('$a, $b', 'return ($a->count < $b->count);') );
|
|
|
|
if ( 'DESC' == $order )
|
|
$tags = array_reverse( $tags, true );
|
|
elseif ( 'RAND' == $order ) {
|
|
$keys = array_rand( $tags, count( $tags ) );
|
|
foreach ( $keys as $key )
|
|
$temp[$key] = $tags[$key];
|
|
$tags = $temp;
|
|
unset( $temp );
|
|
}
|
|
|
|
if ( $number > 0 )
|
|
$tags = array_slice($tags, 0, $number);
|
|
|
|
$counts = array();
|
|
foreach ( (array) $tags as $key => $tag )
|
|
$counts[ $key ] = $tag->count;
|
|
|
|
$min_count = min( $counts );
|
|
$spread = max( $counts ) - $min_count;
|
|
if ( $spread <= 0 )
|
|
$spread = 1;
|
|
$font_spread = $largest - $smallest;
|
|
if ( $font_spread <= 0 )
|
|
$font_spread = 1;
|
|
$font_step = $font_spread / $spread;
|
|
|
|
$a = array();
|
|
|
|
$rel = ( is_object( $wp_rewrite ) && $wp_rewrite->using_permalinks() ) ? ' rel="tag"' : '';
|
|
|
|
foreach ( $tags as $key => $tag ) {
|
|
$count = $counts[ $key ];
|
|
$tag_link = clean_url( $tag->link );
|
|
$tag_id = isset($tags[ $key ]->id) ? $tags[ $key ]->id : $key;
|
|
$tag_name = $tags[ $key ]->name;
|
|
$a[] = "<a href='$tag_link' class='tag-link-$tag_id' title='" . attribute_escape( sprintf( __ngettext( $single_text, $multiple_text, $count ), $count ) ) . "'$rel style='font-size: " .
|
|
( $smallest + ( ( $count - $min_count ) * $font_step ) )
|
|
. "$unit;'>$tag_name</a>";
|
|
}
|
|
|
|
switch ( $format ) :
|
|
case 'array' :
|
|
$return =& $a;
|
|
break;
|
|
case 'list' :
|
|
$return = "<ul class='wp-tag-cloud'>\n\t<li>";
|
|
$return .= join( "</li>\n\t<li>", $a );
|
|
$return .= "</li>\n</ul>\n";
|
|
break;
|
|
default :
|
|
$return = join( "\n", $a );
|
|
break;
|
|
endswitch;
|
|
|
|
return apply_filters( 'wp_generate_tag_cloud', $return, $tags, $args );
|
|
}
|
|
|
|
//
|
|
// Helper functions
|
|
//
|
|
|
|
/**
|
|
* Retrieve HTML list content for category list.
|
|
*
|
|
* @uses Walker_Category to create HTML list content.
|
|
* @since 2.1.0
|
|
* @see Walker_Category::walk() for parameters and return description.
|
|
*/
|
|
function walk_category_tree() {
|
|
$walker = new Walker_Category;
|
|
$args = func_get_args();
|
|
return call_user_func_array(array( &$walker, 'walk' ), $args );
|
|
}
|
|
|
|
/**
|
|
* Retrieve HTML dropdown (select) content for category list.
|
|
*
|
|
* @uses Walker_CategoryDropdown to create HTML dropdown content.
|
|
* @since 2.1.0
|
|
* @see Walker_CategoryDropdown::walk() for parameters and return description.
|
|
*/
|
|
function walk_category_dropdown_tree() {
|
|
$walker = new Walker_CategoryDropdown;
|
|
$args = func_get_args();
|
|
return call_user_func_array(array( &$walker, 'walk' ), $args );
|
|
}
|
|
|
|
//
|
|
// Tags
|
|
//
|
|
|
|
/**
|
|
* Retrieve the link to the tag.
|
|
*
|
|
* @since 2.3.0
|
|
* @uses apply_filters() Calls 'tag_link' with tag link and tag ID as parameters.
|
|
*
|
|
* @param int $tag_id Tag (term) ID.
|
|
* @return string
|
|
*/
|
|
function get_tag_link( $tag_id ) {
|
|
global $wp_rewrite;
|
|
$taglink = $wp_rewrite->get_tag_permastruct();
|
|
|
|
$tag = &get_term( $tag_id, 'post_tag' );
|
|
if ( is_wp_error( $tag ) )
|
|
return $tag;
|
|
$slug = $tag->slug;
|
|
|
|
if ( empty( $taglink ) ) {
|
|
$file = get_option( 'home' ) . '/';
|
|
$taglink = $file . '?tag=' . $slug;
|
|
} else {
|
|
$taglink = str_replace( '%tag%', $slug, $taglink );
|
|
$taglink = get_option( 'home' ) . user_trailingslashit( $taglink, 'category' );
|
|
}
|
|
return apply_filters( 'tag_link', $taglink, $tag_id );
|
|
}
|
|
|
|
/**
|
|
* Retrieve the tags for a post.
|
|
*
|
|
* @since 2.3.0
|
|
* @uses apply_filters() Calls 'get_the_tags' filter on the list of post tags.
|
|
*
|
|
* @param int $id Post ID.
|
|
* @return array
|
|
*/
|
|
function get_the_tags( $id = 0 ) {
|
|
return apply_filters( 'get_the_tags', get_the_terms( $id, 'post_tag' ) );
|
|
}
|
|
|
|
/**
|
|
* Retrieve the tags for a post formatted as a string.
|
|
*
|
|
* @since 2.3.0
|
|
* @uses apply_filters() Calls 'the_tags' filter on string list of tags.
|
|
*
|
|
* @param string $before Optional. Before tags.
|
|
* @param string $sep Optional. Between tags.
|
|
* @param string $after Optional. After tags.
|
|
* @return string
|
|
*/
|
|
function get_the_tag_list( $before = '', $sep = '', $after = '' ) {
|
|
return apply_filters( 'the_tags', get_the_term_list( 0, 'post_tag', $before, $sep, $after ) );
|
|
}
|
|
|
|
/**
|
|
* Retrieve the tags for a post.
|
|
*
|
|
* @since 2.3.0
|
|
*
|
|
* @param string $before Optional. Before list.
|
|
* @param string $sep Optional. Separate items using this.
|
|
* @param string $after Optional. After list.
|
|
* @return string
|
|
*/
|
|
function the_tags( $before = 'Tags: ', $sep = ', ', $after = '' ) {
|
|
return the_terms( 0, 'post_tag', $before, $sep, $after );
|
|
}
|
|
|
|
/**
|
|
* Retrieve the terms of the taxonomy that are attached to the post.
|
|
*
|
|
* This function can only be used within the loop.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @param int $id Post ID. Is not optional.
|
|
* @param string $taxonomy Taxonomy name.
|
|
* @return array|bool False on failure. Array of term objects on success.
|
|
*/
|
|
function get_the_terms( $id = 0, $taxonomy ) {
|
|
global $post;
|
|
|
|
$id = (int) $id;
|
|
|
|
if ( ! $id && ! in_the_loop() )
|
|
return false; // in-the-loop function
|
|
|
|
if ( !$id )
|
|
$id = (int) $post->ID;
|
|
|
|
$terms = get_object_term_cache( $id, $taxonomy );
|
|
if ( false === $terms )
|
|
$terms = wp_get_object_terms( $id, $taxonomy );
|
|
|
|
if ( empty( $terms ) )
|
|
return false;
|
|
|
|
return $terms;
|
|
}
|
|
|
|
/**
|
|
* Retrieve terms as a list with specified format.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @param int $id Term ID.
|
|
* @param string $taxonomy Taxonomy name.
|
|
* @param string $before Optional. Before list.
|
|
* @param string $sep Optional. Separate items using this.
|
|
* @param string $after Optional. After list.
|
|
* @return string
|
|
*/
|
|
function get_the_term_list( $id = 0, $taxonomy, $before = '', $sep = '', $after = '' ) {
|
|
$terms = get_the_terms( $id, $taxonomy );
|
|
|
|
if ( is_wp_error( $terms ) )
|
|
return $terms;
|
|
|
|
if ( empty( $terms ) )
|
|
return false;
|
|
|
|
foreach ( $terms as $term ) {
|
|
$link = get_term_link( $term, $taxonomy );
|
|
if ( is_wp_error( $link ) )
|
|
return $link;
|
|
$term_links[] = '<a href="' . $link . '" rel="tag">' . $term->name . '</a>';
|
|
}
|
|
|
|
$term_links = apply_filters( "term_links-$taxonomy", $term_links );
|
|
|
|
return $before . join( $sep, $term_links ) . $after;
|
|
}
|
|
|
|
/**
|
|
* Display the terms in a list.
|
|
*
|
|
* @since 2.5.0
|
|
*
|
|
* @param int $id Term ID.
|
|
* @param string $taxonomy Taxonomy name.
|
|
* @param string $before Optional. Before list.
|
|
* @param string $sep Optional. Separate items using this.
|
|
* @param string $after Optional. After list.
|
|
* @return null|bool False on WordPress error. Returns null when displaying.
|
|
*/
|
|
function the_terms( $id, $taxonomy, $before = '', $sep = '', $after = '' ) {
|
|
$return = get_the_term_list( $id, $taxonomy, $before, $sep, $after );
|
|
if ( is_wp_error( $return ) )
|
|
return false;
|
|
else
|
|
echo $return;
|
|
}
|
|
|
|
/**
|
|
* Check if the current post has the given tag.
|
|
*
|
|
* This function is only for use within the WordPress Loop.
|
|
*
|
|
* @since 2.6.0
|
|
*
|
|
* @uses wp_get_object_terms() Gets the tags.
|
|
*
|
|
* @param string|int|array $tag Optional. The tag name/id/slug or array of them to check for.
|
|
* @return bool True if the current post has the given tag, or any tag, if no tag specified.
|
|
*/
|
|
function has_tag( $tag = '' ) {
|
|
global $post;
|
|
$taxonomy = 'post_tag';
|
|
|
|
if ( !in_the_loop() ) return false; // in-the-loop function
|
|
|
|
$post_id = (int) $post->ID;
|
|
|
|
$terms = get_object_term_cache( $post_id, $taxonomy );
|
|
if ( empty( $terms ) )
|
|
$terms = wp_get_object_terms( $post_id, $taxonomy );
|
|
if ( empty( $terms ) ) return false;
|
|
|
|
if ( empty( $tag ) ) return ( !empty( $terms ) );
|
|
|
|
$tag = (array) $tag;
|
|
|
|
foreach ( $terms as $term ) {
|
|
if ( in_array( $term->term_id, $tag ) ) return true;
|
|
if ( in_array( $term->name, $tag ) ) return true;
|
|
if ( in_array( $term->slug, $tag ) ) return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
?>
|