X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/11be8dc178e77d0b46189bbd8e33a216a9b90942..53f4633144ed68c8b8fb5861f992b5489894a940:/wp-includes/category.php

diff --git a/wp-includes/category.php b/wp-includes/category.php
index fb81dfb2..a94baa7c 100644
--- a/wp-includes/category.php
+++ b/wp-includes/category.php
@@ -5,23 +5,6 @@
  * @package WordPress
  */
 
-/**
- * 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', 'fields=ids&get=all' );
-		wp_cache_add( 'all_category_ids', $cat_ids, 'category' );
-	}
-
-	return $cat_ids;
-}
-
 /**
  * Retrieve list of category objects.
  *
@@ -31,18 +14,33 @@ function get_all_category_ids() {
  *
  * @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.
  */
-function &get_categories( $args = '' ) {
-	$defaults = array( 'type' => 'category' );
+function get_categories( $args = '' ) {
+	$defaults = array( 'taxonomy' => 'category' );
 	$args = wp_parse_args( $args, $defaults );
 
-	$taxonomy = apply_filters( 'get_categories_taxonomy', 'category', $args );
-	if ( 'link' == $args['type'] )
-		$taxonomy = 'link_category';
+	$taxonomy = $args['taxonomy'];
+
+	/**
+	 * 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 {@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', '' );
+		$taxonomy = $args['taxonomy'] = 'link_category';
+	}
+
 	$categories = (array) get_terms( $taxonomy, $args );
 
 	foreach ( array_keys( $categories ) as $k )
@@ -66,15 +64,16 @@ function &get_categories( $args = '' ) {
  * 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' ) {
+function get_category( $category, $output = OBJECT, $filter = 'raw' ) {
 	$category = get_term( $category, 'category', $output, $filter );
+
 	if ( is_wp_error( $category ) )
 		return $category;
 
@@ -98,9 +97,9 @@ function &get_category( $category, $output = OBJECT, $filter = 'raw' ) {
  * @since 2.1.0
  *
  * @param string $category_path URL containing category slugs.
- * @param bool $full_match Optional. Whether should match full path or not.
+ * @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 ) );
@@ -110,33 +109,39 @@ function get_category_by_path( $category_path, $full_match = true, $output = OBJ
 	$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) );
 
-	$categories = get_terms( 'category', "get=all&slug=$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;
 		}
 
-		if ( $path == $full_path )
-			return get_category( $category->term_id, $output );
+		if ( $path == $full_path ) {
+			$category = get_term( $category->term_id, 'category', $output );
+			_make_cat_compat( $category );
+			return $category;
+		}
 	}
 
 	// If full matching is not required, return the first cat that matches the leaf.
-	if ( ! $full_match )
-		return get_category( $categories[0]->term_id, $output );
-
-	return null;
+	if ( ! $full_match ) {
+		$category = get_term( reset( $categories )->term_id, 'category', $output );
+		_make_cat_compat( $category );
+		return $category;
+	}
 }
 
 /**
@@ -155,53 +160,37 @@ function get_category_by_slug( $slug  ) {
 	return $category;
 }
 
-
 /**
  * Retrieve the ID of a category from its name.
  *
  * @since 1.0.0
  *
- * @param string $cat_name Optional. Default is 'General' and can be any category name.
+ * @param string $cat_name Category name.
  * @return int 0, if failure and ID of category on success.
  */
-function get_cat_ID( $cat_name='General' ) {
+function get_cat_ID( $cat_name ) {
 	$cat = get_term_by( 'name', $cat_name, 'category' );
 	if ( $cat )
 		return $cat->term_id;
 	return 0;
 }
 
-
-/**
- * Retrieve the category name by the category ID.
- *
- * @since 0.71
- * @deprecated Use get_cat_name()
- * @see get_cat_name() get_catname() is deprecated in favor of get_cat_name().
- *
- * @param int $cat_ID Category ID
- * @return string category name
- */
-function get_catname( $cat_ID ) {
-	return get_cat_name( $cat_ID );
-}
-
-
 /**
  * Retrieve the name of a category from its ID.
  *
  * @since 1.0.0
  *
  * @param int $cat_id Category ID
- * @return string Category name
+ * @return string Category name, or an empty string if category doesn't exist.
  */
 function get_cat_name( $cat_id ) {
 	$cat_id = (int) $cat_id;
-	$category = &get_category( $cat_id );
+	$category = get_term( $cat_id, 'category' );
+	if ( ! $category || is_wp_error( $category ) )
+		return '';
 	return $category->name;
 }
 
-
 /**
  * Check if a category is an ancestor of another category.
  *
@@ -215,26 +204,13 @@ function get_cat_name( $cat_id ) {
  * @return bool Whether $cat2 is child of $cat1
  */
 function cat_is_ancestor_of( $cat1, $cat2 ) {
-	if ( is_int( $cat1 ) )
-		$cat1 = &get_category( $cat1 );
-	if ( is_int( $cat2 ) )
-		$cat2 = &get_category( $cat2 );
-
-	if ( !$cat1->term_id || !$cat2->parent )
-		return false;
-
-	if ( $cat2->parent == $cat1->term_id )
-		return true;
-
-	return cat_is_ancestor_of( $cat1, get_category( $cat2->parent ) );
+	return term_is_ancestor_of( $cat1, $cat2, 'category' );
 }
 
-
 /**
  * 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'.
@@ -244,12 +220,10 @@ function sanitize_category( $category, $context = 'display' ) {
 	return sanitize_term( $category, 'category', $context );
 }
 
-
 /**
  * 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
@@ -263,18 +237,16 @@ function sanitize_category_field( $field, $value, $cat_id, $context ) {
 
 /* Tags */
 
-
 /**
  * Retrieves all post tags.
  *
  * @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.
  */
-function &get_tags( $args = '' ) {
+function get_tags( $args = '' ) {
 	$tags = get_terms( 'post_tag', $args );
 
 	if ( empty( $tags ) ) {
@@ -282,11 +254,18 @@ function &get_tags( $args = '' ) {
 		return $return;
 	}
 
+	/**
+	 * Filter the array of term objects returned for the 'post_tag' taxonomy.
+	 *
+	 * @since 2.3.0
+	 *
+	 * @param array $tags Array of 'post_tag' term objects.
+	 * @param array $args An array of arguments. @see get_terms()
+	 */
 	$tags = apply_filters( 'get_tags', $tags, $args );
 	return $tags;
 }
 
-
 /**
  * Retrieve post tag by tag ID or tag object.
  *
@@ -304,37 +283,18 @@ function &get_tags( $args = '' ) {
  * @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' ) {
+function get_tag( $tag, $output = OBJECT, $filter = 'raw' ) {
 	return get_term( $tag, 'post_tag', $output, $filter );
 }
 
-
 /* Cache */
 
-
-/**
- * Update the categories cache.
- *
- * This function does not appear to be used anymore or does not appear to be
- * needed. It might be a legacy function left over from when there was a need
- * for updating the category cache.
- *
- * @since 1.5.0
- *
- * @return bool Always return True
- */
-function update_category_cache() {
-	return true;
-}
-
-
 /**
  * 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
  */
@@ -342,7 +302,6 @@ function clean_category_cache( $id ) {
 	clean_term_cache( $id, 'category' );
 }
 
-
 /**
  * Update category structure to old pre 2.3 from new taxonomy structure.
  *
@@ -363,7 +322,7 @@ function clean_category_cache( $id ) {
  * @param array|object $category Category Row object or array
  */
 function _make_cat_compat( &$category ) {
-	if ( is_object( $category ) ) {
+	if ( is_object( $category ) && ! is_wp_error( $category ) ) {
 		$category->cat_ID = &$category->term_id;
 		$category->category_count = &$category->count;
 		$category->category_description = &$category->description;
@@ -379,6 +338,3 @@ function _make_cat_compat( &$category ) {
 		$category['category_parent'] = &$category['parent'];
 	}
 }
-
-
-?>