Taxonomy: Introduce new hooks when registering/unregistering taxonomies for object types.

Props soulseekah.
Fixes #44733.
Built from https://develop.svn.wordpress.org/trunk@43558


git-svn-id: http://core.svn.wordpress.org/trunk@43387 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/taxonomy.php

@@ -613,6 +613,16 @@ function register_taxonomy_for_object_type( $taxonomy, $object_type ) {
 	// Filter out empties.
 	$wp_taxonomies[ $taxonomy ]->object_type = array_filter( $wp_taxonomies[ $taxonomy ]->object_type );
 
+	/**
+	 * Fires after a taxonomy is registered for an object type.
+	 *
+	 * @since 5.0.0
+	 *
+	 * @param string $taxonomy    Taxonomy name.
+	 * @param string $object_type Name of the object type.
+	 */
+	do_action( 'registered_taxonomy_for_object_type', $taxonomy, $object_type );
+
 	return true;
 }
 
@@ -644,6 +654,17 @@ function unregister_taxonomy_for_object_type( $taxonomy, $object_type ) {
 	}
 
 	unset( $wp_taxonomies[ $taxonomy ]->object_type[ $key ] );
+
+	/**
+	 * Fires after a taxonomy is unregistered for an object type.
+	 *
+	 * @since 5.0.0
+	 *
+	 * @param string $taxonomy    Taxonomy name.
+	 * @param string $object_type Name of the object type.
+	 */
+	do_action( 'unregistered_taxonomy_for_object_type', $taxonomy, $object_type );
+
 	return true;
 }
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.0-alpha-43556';
+$wp_version = '5.0-alpha-43558';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.