Add gravity flow demo

backend/wordpress/wp-content/plugins/view-admin-as/uninstall.php

@@ -0,0 +1,72 @@
+<?php
+/**
+ * View Admin As - Uninstaller
+ *
+ * Remove plugin data from the database
+ *
+ * @author Jory Hogeveen <info@keraweb.nl>
+ * @package view-admin-as
+ * @since   1.3.4
+ * @version 1.7
+ */
+
+//if uninstall not called from WordPress exit
+if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
+	die();
+}
+
+vaa_uninstall();
+
+if ( is_multisite() ) {
+	global $wp_version;
+	if ( version_compare( $wp_version, '4.5.999', '<' ) ) {
+		// @codingStandardsIgnoreLine >> Backwards compat (Sadly does not work for large networks -> return false).
+		$blogs = wp_get_sites();
+	} else {
+		$blogs = get_sites();
+	}
+	if ( $blogs ) {
+		foreach ( $blogs as $blog ) {
+			$blog = (array) $blog;
+			vaa_uninstall( intval( $blog['blog_id'] ) );
+		}
+		vaa_uninstall( 'site' );
+	}
+}
+function vaa_uninstall( $blog_id = false ) {
+
+	// Delete all View Admin As options
+	$option_keys = array( 'vaa_view_admin_as', 'vaa_role_defaults', 'vaa_role_manager' );
+
+	if ( $blog_id ) {
+
+		if ( 'site' === $blog_id ) {
+			foreach ( $option_keys as $option_key ) {
+				delete_site_option( $option_key );
+			}
+		} else {
+			foreach ( $option_keys as $option_key ) {
+				delete_blog_option( $blog_id, $option_key );
+			}
+		}
+
+	} else {
+
+		foreach ( $option_keys as $option_key ) {
+			delete_option( $option_key );
+		}
+
+		// Delete all View Admin As user metadata
+		$user_meta_keys = array( 'vaa-view-admin-as' );
+		// Older (not used anymore) keys
+		$user_meta_keys[] = 'view-admin-as';
+
+		global $wpdb;
+		foreach ( $user_meta_keys as $user_meta_key ) {
+			$wpdb->delete(
+				$wpdb->usermeta,
+				array( 'meta_key' => $user_meta_key )
+			);
+		}
+	}
+}