uninstall.php

<?php
/**
 * Uninstall Cache Master plugin.
 *
 * @author Terry Lin
 * @link https://terryl.in/
 *
 * @package Cache Master
 * @since 1.0.0
 * @version 1.3.0
 */

// if uninstall.php is not called by WordPress, die.
if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) {
	die;
}

$option_uninstall = get_option( 'scm_option_uninstall' );

if ( 'yes' === $option_uninstall ) {

	$options = array(
		'driver',
		'ttl',
		'uninstall',
		'caching_status',
		'expert_mode_status',
		'post_homepage',
		'visibility_login_user',
		'visibility_guest',
		'statistics_status',
		'clear_cache',
		'benchmark_widget',
		'benchmark_footer_text',
		'benchmark_widget_display',
		'benchmark_footer_text_display',
		'exclusion_status',
		'excluded_list',
		'excluded_list_filtered',
		'excluded_get_vars',
		'excluded_post_vars',
		'excluded_cookie_vars',
		'advanced_driver_memcached',
		'advanced_driver_redis',
		'advanced_driver_mongodb',
		'advanced_driver_mongodb_connection_type',
		'advanced_driver_redis_connection_type',
		'advanced_driver_memcached_connection_type',
		'html_debug_comment',
		'post_types',
		'post_archives',
		'woocommerce_status',
		'woocommerce_post_types',
		'woocommerce_taxonomies',
		'woocommerce_event_payment_complete',
	);

	foreach ( $options as $option ) {
		delete_option( 'scm_option_' . $option );
	}

	delete_option( 'scm_last_reset_time' );
	delete_option( 'scm_version' );
	delete_option( 'scm_dir_hash' );
	delete_option( 'scm_blog_id' );

	$dir = WP_CONTENT_DIR . '/uploads/cache-master';

	if ( is_dir( $dir ) ) {
		$it = new RecursiveDirectoryIterator( $dir, RecursiveDirectoryIterator::SKIP_DOTS );
		$files = new RecursiveIteratorIterator( $it, RecursiveIteratorIterator::CHILD_FIRST );

		foreach ( $files as $file ) {
			if ( $file->isDir() ) {
				rmdir( $file->getRealPath() );
			} else {
				unlink( $file->getRealPath() );
			}
		}
		unset( $it, $files );

		rmdir( $dir );
	}
}