parent == $id && !in_array( $category->term_id, $visited ) ) {
$visited[] = $category->term_id;
$chain .= $before.$category->term_id.$after;
$chain .= get_category_children( $category->term_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 );
if ( is_wp_error( $category ) )
return $category;
$category_nicename = $category->slug;
if ( $parent = $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, $visited = array() ) {
$chain = '';
$parent = &get_category( $id );
if ( is_wp_error( $parent ) )
return $parent;
if ( $nicename )
$name = $parent->slug;
else
$name = $parent->cat_name;
if ( $parent->parent && ( $parent->parent != $parent->term_id ) && !in_array( $parent->parent, $visited ) ) {
$visited[] = $parent->parent;
$chain .= get_category_parents( $parent->parent, $link, $separator, $nicename, $visited );
}
if ( $link )
$chain .= 'cat_name ) . '">'.$name.'' . $separator;
else
$chain .= $name.$separator;
return $chain;
}
function get_the_category( $id = false ) {
global $post;
$id = (int) $id;
if ( !$id )
$id = (int) $post->ID;
$categories = get_object_term_cache( $id, 'category' );
if ( false === $categories )
$categories = wp_get_object_terms( $id, 'category' );
if ( !empty( $categories ) )
usort( $categories, '_usort_terms_by_name' );
else
$categories = array();
foreach ( (array) array_keys( $categories ) as $key ) {
_make_cat_compat( $categories[$key] );
}
return $categories;
}
function _usort_terms_by_name( $a, $b ) {
return strcmp( $a->name, $b->name );
}
function _usort_terms_by_ID( $a, $b ) {
if ( $a->term_id > $b->term_id )
return 1;
elseif ( $a->term_id < $b->term_id )
return -1;
else
return 0;
}
function get_the_category_by_ID( $cat_ID ) {
$cat_ID = (int) $cat_ID;
$category = &get_category( $cat_ID );
if ( is_wp_error( $category ) )
return $category;
return $category->name;
}
function get_the_category_list( $separator = '', $parents='', $post_id = false ) {
global $wp_rewrite;
$categories = get_the_category( $post_id );
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->parent )
$thelist .= get_category_parents( $category->parent, TRUE );
$thelist .= 'name ) . '" ' . $rel . '>' . $category->name.'
';
break;
case 'single':
$thelist .= 'name ) . '" ' . $rel . '>';
if ( $category->parent )
$thelist .= get_category_parents( $category->parent, FALSE );
$thelist .= $category->name.'';
break;
case '':
default:
$thelist .= '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->parent )
$thelist .= get_category_parents( $category->parent, TRUE );
$thelist .= 'name ) . '" ' . $rel . '>' . $category->cat_name.'';
break;
case 'single':
$thelist .= 'name ) . '" ' . $rel . '>';
if ( $category->parent )
$thelist .= get_category_parents( $category->parent, FALSE );
$thelist .= "$category->cat_name";
break;
case '':
default:
$thelist .= 'name ) . '" ' . $rel . '>' . $category->name.'';
}
++$i;
}
}
return apply_filters( 'the_category', $thelist, $separator, $parents );
}
/*
* in_category() - Checks whether the current post is within a particular category
*
* This function checks to see if the post is within the supplied category. The categoy
* can be specified by number or name and will be checked as a name first to allow for categories with numeric names.
* Note: Prior to v2.5 of WordPress category names where not supported.
*
* @since 1.2.0
*
* @param int|string $category
* @return bool true if the post is in the supplied category
*/
function in_category( $category ) { // Check if the current post is in the given category
global $post;
if ( empty( $category ) )
return false;
// If category is not an int, check to see if it's a name
if ( ! is_int( $category ) ) {
$cat_ID = get_cat_ID( $category );
if ( $cat_ID )
$category = $cat_ID;
}
$categories = get_object_term_cache( $post->ID, 'category' );
if ( false === $categories )
$categories = wp_get_object_terms( $post->ID, 'category' );
if ( array_key_exists( $category, $categories ) )
return true;
else
return false;
}
function the_category( $separator = '', $parents='', $post_id = false ) {
echo get_the_category_list( $separator, $parents, $post_id );
}
function category_description( $category = 0 ) {
global $cat;
if ( !$category )
$category = $cat;
return get_term_field( 'description', $category, 'category' );
}
function wp_dropdown_categories( $args = '' ) {
$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',
'depth' => 0, 'tab_index' => 0
);
$defaults['selected'] = ( is_category() ) ? get_query_var( 'cat' ) : 0;
$r = wp_parse_args( $args, $defaults );
$r['include_last_update_time'] = $r['show_last_update'];
extract( $r );
$tab_index_attribute = '';
if ( (int) $tab_index > 0 )
$tab_index_attribute = " tabindex=\"$tab_index\"";
$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 = '' ) {
$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_type' => '',
'feed_image' => '', 'exclude' => '', 'current_category' => 0,
'hierarchical' => true, 'title_li' => __( 'Categories' ),
'echo' => 1, 'depth' => 0
);
$r = wp_parse_args( $args, $defaults );
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( !empty( $show_option_all ) )
if ( 'list' == $style )
$output .= '- ' . $show_option_all . '
';
else
$output .= '' . $show_option_all . '';
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 .= '
';
$output = apply_filters( 'wp_list_categories', $output );
if ( $echo )
echo $output;
else
return $output;
}
function wp_tag_cloud( $args = '' ) {
$defaults = array(
'smallest' => 8, 'largest' => 22, 'unit' => 'pt', 'number' => 45,
'format' => 'flat', 'orderby' => 'name', 'order' => 'ASC',
'exclude' => '', 'include' => ''
);
$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 ) {
$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
*
* TODO: Complete
*
* @since 2.6
*
* $tags = array of objects with the properties 'name', 'link', 'id', and 'count'
* $args['format'] = 'flat' => whitespace separated, 'list' => UL, 'array' => array()
* $args['orderby'] = 'name', 'count'
*/
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;
$a[] = "$tag_name";
}
switch ( $format ) :
case 'array' :
$return =& $a;
break;
case 'list' :
$return = "\n\t- ";
$return .= join( "
\n\t- ", $a );
$return .= "
\n
\n";
break;
default :
$return = join( "\n", $a );
break;
endswitch;
return apply_filters( 'wp_generate_tag_cloud', $return, $tags, $args );
}
//
// 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 );
}
//
// Tags
//
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 );
}
function get_the_tags( $id = 0 ) {
return apply_filters( 'get_the_tags', get_the_terms( $id, 'post_tag' ) );
}
function get_the_tag_list( $before = '', $sep = '', $after = '' ) {
return apply_filters( 'the_tags', get_the_term_list( 0, 'post_tag', $before, $sep, $after ) );
}
function the_tags( $before = 'Tags: ', $sep = ', ', $after = '' ) {
return the_terms( 0, 'post_tag', $before, $sep, $after );
}
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;
}
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[] = '' . $term->name . '';
}
$term_links = apply_filters( "term_links-$taxonomy", $term_links );
return $before . join( $sep, $term_links ) . $after;
}
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
*
* @package WordPress
* @since 2.6
*
* @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;
}
?>