<?php
/**
- * WordPress Category API
+ * Taxonomy API: Core category-specific functionality
*
* @package WordPress
+ * @subpackage Taxonomy
*/
/**
* Retrieve list of category objects.
*
* If you change the type to 'link' in the arguments, then the link categories
- * will be returned instead. Also all categories will be updated to be backwards
+ * will be returned instead. Also all categories will be updated to be backward
* compatible with pre-2.3 plugins and themes.
*
* @since 2.1.0
* @see get_terms() Type of arguments that can be changed.
- * @link http://codex.wordpress.org/Function_Reference/get_categories
*
- * @param string|array $args Optional. Change the defaults retrieving categories.
+ * @param string|array $args {
+ * Optional. Arguments to retrieve categories. See get_terms() for additional options.
+ *
+ * @type string $taxonomy Taxonomy to retrieve terms for. In this case, default 'category'.
+ * }
* @return array List of categories.
*/
function get_categories( $args = '' ) {
$taxonomy = $args['taxonomy'];
/**
- * Filter the taxonomy used to retrieve terms when calling {@see get_categories()}.
+ * Filters the taxonomy used to retrieve terms when calling get_categories().
*
* @since 2.7.0
*
* @param string $taxonomy Taxonomy to retrieve terms from.
- * @param array $args An array of arguments. See {@see get_terms()}.
+ * @param array $args An array of arguments. See get_terms().
*/
$taxonomy = apply_filters( 'get_categories_taxonomy', $taxonomy, $args );
// Back compat
if ( isset($args['type']) && 'link' == $args['type'] ) {
- _deprecated_argument( __FUNCTION__, '3.0', '' );
+ /* translators: 1: "type => link", 2: "taxonomy => link_category" alternative */
+ _deprecated_argument( __FUNCTION__, '3.0.0',
+ sprintf( __( '%1$s is deprecated. Use %2$s instead.' ),
+ '<code>type => link</code>',
+ '<code>taxonomy => link_category</code>'
+ )
+ );
$taxonomy = $args['taxonomy'] = 'link_category';
}
- $categories = (array) get_terms( $taxonomy, $args );
+ $categories = get_terms( $taxonomy, $args );
- foreach ( array_keys( $categories ) as $k )
- _make_cat_compat( $categories[$k] );
+ if ( is_wp_error( $categories ) ) {
+ $categories = array();
+ } else {
+ $categories = (array) $categories;
+ foreach ( array_keys( $categories ) as $k ) {
+ _make_cat_compat( $categories[ $k ] );
+ }
+ }
return $categories;
}
* If you look at get_term(), then both types will be passed through several
* filters and finally sanitized based on the $filter parameter value.
*
- * The category will converted to maintain backwards compatibility.
+ * The category will converted to maintain backward compatibility.
*
* @since 1.5.1
*
* @param int|object $category Category ID or Category row object
* @param string $output Optional. Constant OBJECT, ARRAY_A, or ARRAY_N
* @param string $filter Optional. Default is raw or no WordPress defined filter will applied.
- * @return object|array|WP_Error|null Category data in type defined by $output parameter. WP_Error if $category is empty, null if it does not exist.
+ * @return object|array|WP_Error|null Category data in type defined by $output parameter.
+ * WP_Error if $category is empty, null if it does not exist.
*/
function get_category( $category, $output = OBJECT, $filter = 'raw' ) {
$category = get_term( $category, 'category', $output, $filter );
* @param string $category_path URL containing category slugs.
* @param bool $full_match Optional. Whether full path should be matched.
* @param string $output Optional. Constant OBJECT, ARRAY_A, or ARRAY_N
- * @return null|object|array Null on failure. Type is based on $output value.
+ * @return object|array|WP_Error|void Type is based on $output value.
*/
function get_category_by_path( $category_path, $full_match = true, $output = OBJECT ) {
$category_path = rawurlencode( urldecode( $category_path ) );
$leaf_path = sanitize_title( basename( $category_paths ) );
$category_paths = explode( '/', $category_paths );
$full_path = '';
- foreach ( (array) $category_paths as $pathdir )
+ foreach ( (array) $category_paths as $pathdir ) {
$full_path .= ( $pathdir != '' ? '/' : '' ) . sanitize_title( $pathdir );
-
+ }
$categories = get_terms( 'category', array('get' => 'all', 'slug' => $leaf_path) );
- if ( empty( $categories ) )
- return null;
+ if ( empty( $categories ) ) {
+ return;
+ }
foreach ( $categories as $category ) {
$path = '/' . $leaf_path;
$curcategory = $category;
while ( ( $curcategory->parent != 0 ) && ( $curcategory->parent != $curcategory->term_id ) ) {
$curcategory = get_term( $curcategory->parent, 'category' );
- if ( is_wp_error( $curcategory ) )
+ if ( is_wp_error( $curcategory ) ) {
return $curcategory;
+ }
$path = '/' . $curcategory->slug . $path;
}
_make_cat_compat( $category );
return $category;
}
-
- return null;
}
/**
}
/**
- * Filter the array of term objects returned for the 'post_tag' taxonomy.
+ * Filters the array of term objects returned for the 'post_tag' taxonomy.
*
* @since 2.3.0
*
* pass to it. This is one of the features with using pass by reference in PHP.
*
* @since 2.3.0
+ * @since 4.4.0 The `$category` parameter now also accepts a WP_Term object.
* @access private
*
- * @param array|object $category Category Row object or array
+ * @param array|object|WP_Term $category Category Row object or array
*/
function _make_cat_compat( &$category ) {
- if ( is_object( $category ) ) {
- $category->cat_ID = &$category->term_id;
- $category->category_count = &$category->count;
- $category->category_description = &$category->description;
- $category->cat_name = &$category->name;
- $category->category_nicename = &$category->slug;
- $category->category_parent = &$category->parent;
+ if ( is_object( $category ) && ! is_wp_error( $category ) ) {
+ $category->cat_ID = $category->term_id;
+ $category->category_count = $category->count;
+ $category->category_description = $category->description;
+ $category->cat_name = $category->name;
+ $category->category_nicename = $category->slug;
+ $category->category_parent = $category->parent;
} elseif ( is_array( $category ) && isset( $category['term_id'] ) ) {
$category['cat_ID'] = &$category['term_id'];
$category['category_count'] = &$category['count'];
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