clean.php

<?php
if ( ! defined( 'WP_CLI' ) ) {
	if ( ! current_user_can( 'shop_manager' ) && ! current_user_can( 'administrator' ) ) {
		exit( "No permissions\n" );
	}

	if ( 'GET' === $_SERVER['REQUEST_METHOD'] ) {
		?>
        <form method="post">
            <input type="submit" value="Clean">
        </form>
		<?php
	}

	if ( 'POST' !== $_SERVER['REQUEST_METHOD'] ) {
		exit;
	}
}

global $wpdb;

if ( ! isset( $wpdb->termmeta ) ) {
	exit( 'WooCommerce plugin is not active' );
}

wc1c_disable_time_limit();

$rows = $wpdb->get_results( "SELECT tm.term_id, taxonomy FROM $wpdb->termmeta tm JOIN $wpdb->term_taxonomy tt ON tm.term_id = tt.term_id WHERE meta_key = 'wc1c_guid'" );
foreach ( $rows as $row ) {
	wp_delete_term( $row->term_id, $row->taxonomy );
}

$attribute_ids = get_option( 'wc1c_guid_attributes', array() );
foreach ( $attribute_ids as $attribute_id ) {
	wc1c_delete_woocommerce_attribute( $attribute_id );
}
delete_transient( 'wc_attribute_taxonomies' );

$option_names = $wpdb->get_col( "SELECT option_name FROM $wpdb->options WHERE option_name LIKE 'wc1c_%'" );
foreach ( $option_names as $option_name ) {
	delete_option( $option_name );
}

$post_ids = $wpdb->get_col( "SELECT post_id FROM $wpdb->postmeta WHERE meta_key = '_wc1c_guid'" );
foreach ( $post_ids as $wc1c_post_id ) {
	$post_attachments = get_attached_media( 'image', $wc1c_post_id );
	foreach ( $post_attachments as $post_attachment ) {
		wp_delete_attachment( $post_attachment->ID, true );
	}

	wp_delete_post( $wc1c_post_id, true );
}

echo defined( 'WP_CLI' ) ? "\x07" : 'Done';