uninstall.php

<?php
/**
 * Uninstall Easy Digital Downloads
 *
 * Deletes all the plugin data i.e.
 *      1. Custom Post types.
 *      2. Terms & Taxonomies.
 *      3. Plugin pages.
 *      4. Plugin options.
 *      5. Capabilities.
 *      6. Roles.
 *      7. Database tables.
 *      8. Cron events.
 *
 * @package     EDD
 * @subpackage  Uninstall
 * @copyright   Copyright (c) 2018, Easy Digital Downloads
 * @license     http://opensource.org/licenses/gpl-2.0.php GNU Public License
 * @since       1.4.3
 */

// Exit if accessed directly.
if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
	exit;
}

if ( is_plugin_active( 'easy-digital-downloads/easy-digital-downloads.php' ) || is_plugin_active( 'easy-digital-downloads-pro/easy-digital-downloads.php' ) ) {
	return;
}

$edd_settings = get_option( 'edd_settings', array() );
if ( empty( $edd_settings['uninstall_on_delete'] ) ) {
	return;
}

global $wpdb, $wp_roles;

/** Delete All the Custom Post Types */
$edd_taxonomies = array( 'download_category', 'download_tag' );
$edd_post_types = array( 'download' );
foreach ( $edd_post_types as $post_type ) {

	$edd_taxonomies = array_merge( $edd_taxonomies, get_object_taxonomies( $post_type ) );
	$items          = get_posts(
		array(
			'post_type'   => $post_type,
			'post_status' => 'any',
			'numberposts' => -1,
			'fields'      => 'ids',
		)
	);

	if ( $items ) {
		foreach ( $items as $item ) {
			wp_delete_post( $item, true );
		}
	}
}

/** Delete All the Terms & Taxonomies */
foreach ( array_unique( array_filter( $edd_taxonomies ) ) as $taxonomy ) {

	$terms = $wpdb->get_results( $wpdb->prepare( "SELECT t.*, tt.* FROM $wpdb->terms AS t INNER JOIN $wpdb->term_taxonomy AS tt ON t.term_id = tt.term_id WHERE tt.taxonomy IN ('%s') ORDER BY t.name ASC", $taxonomy ) );

	// Delete Terms.
	if ( $terms ) {
		foreach ( $terms as $term ) {
			$wpdb->delete( $wpdb->term_relationships, array( 'term_taxonomy_id' => $term->term_taxonomy_id ) );
			$wpdb->delete( $wpdb->term_taxonomy, array( 'term_taxonomy_id' => $term->term_taxonomy_id ) );
			$wpdb->delete( $wpdb->terms, array( 'term_id' => $term->term_id ) );
		}
	}

	// Delete Taxonomies.
	$wpdb->delete( $wpdb->term_taxonomy, array( 'taxonomy' => $taxonomy ), array( '%s' ) );
}

/** Delete the Plugin Pages */
$edd_created_pages = array( 'purchase_page', 'success_page', 'failure_page', 'purchase_history_page' );
foreach ( $edd_created_pages as $p ) {
	if ( ! empty( $edd_settings[ $p ] ) ) {
		wp_delete_post( $p, true );
	}
}

/** Delete all the Plugin Options */
$edd_options = array(
	'edd_completed_upgrades',
	'edd_default_api_version',
	'edd_earnings_total',
	'edd_earnings_total_without_tax',
	'edd_settings',
	'edd_tracking_notice',
	'edd_tax_rates',
	'edd_use_php_sessions',
	'edd_version',
	'edd_version_upgraded_from',
	'edd_notification_req_timeout',
	'edd_pass_licenses',
	'edd_pass_data',
	'edd_tokenizer_signing_key',
	'edd_use_php_sessions',
	'edd_licensed_extensions',
	'edd_activation_date',
	'edd_pro_activation_date',
	'edd_onboarding_completed',
	'edd_onboarding_started',
	'edd_onboarding_latest_step',

	// Widgets
	'widget_edd_product_details',
	'widget_edd_cart_widget',
	'widget_edd_categories_tags_widget',

	// Deprecated 3.0.0
	'wp_edd_customers_db_version',
	'wp_edd_customermeta_db_version',
	'_edd_table_check',
);
foreach ( $edd_options as $option ) {
	delete_option( $option );
}

$site_options = array(
	'edd_all_extension_data',
	'edd_extension_tag_1578_data',
	'edd_extension_product_28530_data',
	'edd_extension_product_375153_data',
	'edd_extension_product_37976_data',
	'edd_pro_license',
	'edd_pro_license_key',
);
foreach ( $site_options as $site_option ) {
	delete_site_option( $site_option );
}

// Load EDD file.
require_once dirname( __FILE__ ) . '/easy-digital-downloads.php';

// Set the EDD instance.
EDD();

// Register components.
edd_setup_components();

/** Delete Capabilities */
EDD()->roles->remove_caps();

/** Delete the Roles */
$edd_roles = array( 'shop_manager', 'shop_accountant', 'shop_worker', 'shop_vendor' );
foreach ( $edd_roles as $role ) {
	remove_role( $role );
}

// Remove all database tables
foreach ( EDD()->components as $component ) {
	/**
	 * @var EDD\Database\Table $table
	 */
	$table = $component->get_interface( 'table' );

	if ( $table instanceof EDD\Database\Table ) {
		$table->uninstall();
	}

	// Check to see if this component has a meta table to uninstall.

	/**
	 * @var EDD\Database\Table $meta_table
	 */
	$meta_table = $component->get_interface( 'meta' );

	if ( $meta_table instanceof EDD\Database\Table ) {
		$meta_table->uninstall();
	}
}

/** Cleanup Cron Events */
wp_clear_scheduled_hook( 'edd_daily_scheduled_events' );
wp_clear_scheduled_hook( 'edd_daily_cron' );
wp_clear_scheduled_hook( 'edd_weekly_cron' );
wp_clear_scheduled_hook( 'edd_email_summary_cron' );
wp_clear_scheduled_hook( 'edd_weekly_scheduled_events' );

// Remove any transients we've left behind
$wpdb->query( "DELETE FROM $wpdb->options WHERE option_name LIKE '\_transient\_edd\_%'" );
$wpdb->query( "DELETE FROM $wpdb->options WHERE option_name LIKE '\_site\_transient\_edd\_%'" );
$wpdb->query( "DELETE FROM $wpdb->options WHERE option_name LIKE '\_transient\_timeout\_edd\_%'" );
$wpdb->query( "DELETE FROM $wpdb->options WHERE option_name LIKE '\_site\_transient\_timeout\_edd\_%'" );