Multisite: Delete the signup entry when a user is deleted from the database.

When a user has registered with incorrect data and got the account deleted immediately, it currently wasn't possible to register with the same login or email address again due to the existing signup entry. They had to wait for two days until the entry gets automatically deleted. Now the associated signup entry gets deleted as part of the account deletion.

Fixes #43232.
Built from https://develop.svn.wordpress.org/trunk@48315


git-svn-id: http://core.svn.wordpress.org/trunk@48084 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/ms-default-filters.php

@@ -31,6 +31,7 @@ add_action( 'network_site_new_created_user', 'wp_send_new_user_notifications' );
 add_action( 'network_site_users_created_user', 'wp_send_new_user_notifications' );
 add_action( 'network_user_new_created_user', 'wp_send_new_user_notifications' );
 add_filter( 'sanitize_user', 'strtolower' );
+add_action( 'deleted_user', 'wp_delete_signup_on_user_delete', 10, 3 );
 
 // Roles.
 add_action( 'switch_blog', 'wp_switch_roles_and_user', 1, 2 );

wp-includes/ms-functions.php

@@ -1276,6 +1276,21 @@ function wpmu_activate_signup( $key ) {
 	);
 }
 
+/**
+ * Deletes am associated signup entry when a user is deleted from the database.
+ *
+ * @since 5.5.0
+ *
+ * @param int      $id       ID of the user to delete.
+ * @param int|null $reassign ID of the user to reassign posts and links to.
+ * @param WP_User  $user     User object.
+ */
+function wp_delete_signup_on_user_delete( $id, $reassign, $user ) {
+	global $wpdb;
+
+	$wpdb->delete( $wpdb->signups, array( 'user_login' => $user->user_login ) );
+}
+
 /**
  * Create a user.
  *

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.5-alpha-48314';
+$wp_version = '5.5-alpha-48315';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.