diff -r 346c88efed21 -r 5e2f62d02dcd wp/wp-includes/category.php
--- a/wp/wp-includes/category.php	Mon Jun 08 16:11:51 2015 +0000
+++ b/wp/wp-includes/category.php	Tue Jun 09 03:35:32 2015 +0200
@@ -6,23 +6,6 @@
  */
 
 /**
- * Retrieves all category IDs.
- *
- * @since 2.0.0
- * @link http://codex.wordpress.org/Function_Reference/get_all_category_ids
- *
- * @return object List of all of the category IDs.
- */
-function get_all_category_ids() {
-	if ( ! $cat_ids = wp_cache_get( 'all_category_ids', 'category' ) ) {
-		$cat_ids = get_terms( 'category', array('fields' => 'ids', 'get' => 'all') );
-		wp_cache_add( 'all_category_ids', $cat_ids, 'category' );
-	}
-
-	return $cat_ids;
-}
-
-/**
  * Retrieve list of category objects.
  *
  * If you change the type to 'link' in the arguments, then the link categories
@@ -31,7 +14,7 @@
  *
  * @since 2.1.0
  * @see get_terms() Type of arguments that can be changed.
- * @link http://codex.wordpress.org/Function_Reference/get_categories
+ * @link https://codex.wordpress.org/Function_Reference/get_categories
  *
  * @param string|array $args Optional. Change the defaults retrieving categories.
  * @return array List of categories.
@@ -41,13 +24,14 @@
 	$args = wp_parse_args( $args, $defaults );
 
 	$taxonomy = $args['taxonomy'];
+
 	/**
-	 * Filter the taxonomy used to retrieve terms when calling get_categories().
+	 * Filter the taxonomy used to retrieve terms when calling {@see get_categories()}.
 	 *
 	 * @since 2.7.0
 	 *
 	 * @param string $taxonomy Taxonomy to retrieve terms from.
-	 * @param array  $args     An array of arguments. @see get_terms()
+	 * @param array  $args     An array of arguments. See {@see get_terms()}.
 	 */
 	$taxonomy = apply_filters( 'get_categories_taxonomy', $taxonomy, $args );
 
@@ -80,15 +64,15 @@
  * The category will converted to maintain backwards compatibility.
  *
  * @since 1.5.1
- * @uses get_term() Used to get the category data from the taxonomy.
  *
  * @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 mixed Category data in type defined by $output parameter.
+ * @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 );
+
 	if ( is_wp_error( $category ) )
 		return $category;
 
@@ -226,7 +210,6 @@
  * Sanitizes category data based on context.
  *
  * @since 2.3.0
- * @uses sanitize_term() See this function for what context are supported.
  *
  * @param object|array $category Category data
  * @param string $context Optional. Default is 'display'.
@@ -240,7 +223,6 @@
  * Sanitizes data in single category key field.
  *
  * @since 2.3.0
- * @uses sanitize_term_field() See function for more details.
  *
  * @param string $field Category key to sanitize
  * @param mixed $value Category value to sanitize
@@ -259,7 +241,6 @@
  *
  * @since 2.3.0
  * @see get_terms() For list of arguments to pass.
- * @uses apply_filters() Calls 'get_tags' hook on array of tags and with $args.
  *
  * @param string|array $args Tag arguments to use when retrieving tags.
  * @return array List of tags.
@@ -301,7 +282,7 @@
  * @param int|object $tag
  * @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 Return type based on $output value.
+ * @return object|array|WP_Error|null Tag data in type defined by $output parameter. WP_Error if $tag is empty, null if it does not exist.
  */
 function get_tag( $tag, $output = OBJECT, $filter = 'raw' ) {
 	return get_term( $tag, 'post_tag', $output, $filter );
@@ -313,7 +294,6 @@
  * Remove the category cache data based on ID.
  *
  * @since 2.1.0
- * @uses clean_term_cache() Clears the cache for the category based on ID
  *
  * @param int $id Category ID
  */