WordPress REST API

And the Copyrights.

Creating sign-up form for some website (source website) in another website (destination website): in the source website create access passwords with the plugin, in the destination website create sign-up form with the plugin and use the code (update the source website address and the access details):

add_action( 'wpcf7_posted_data', 'condless_create_remote_user' );
function condless_create_remote_user( $posted_data ) {
	$api_response = wp_remote_post( '', array(
		'headers' => array(
			'Authorization' => 'Basic ' . base64_encode( 'LOGIN:PASSWORD' )
		'body' => array(
			'username'	=> $posted_data['your-name'],
			'email' 	=> $posted_data['your-email'],
			'password'	=> $posted_data['your-password'],
	) );
	$body = json_decode( $api_response['body'] );
	if ( 'OK' === wp_remote_retrieve_response_message( $api_response ) ) {
		// Do something with $body

As you probably have noticed- the largest Copyright controversy was agains Google for having distributed a new implementation of Java embedded in the Android operating system, the controversy reached the Supreme Court of the United States.


WooCommerce Product Edit Permission

And the Persian Mathematician.

Removal of the option to edit some fields for specific user role (update the fields and the user role):

add_action( 'add_meta_boxes_product', 'condless_remove_metaboxes_edit_product', 9999 );
function condless_remove_metaboxes_edit_product() {
	if ( ! current_user_can( 'manage_options' ) ) {
		remove_meta_box( 'postexcerpt', 'product', 'normal' );
		remove_meta_box( 'postimagediv', 'product', 'side' );
		remove_meta_box( 'woocommerce-product-images', 'product', 'side' );

add_filter( 'woocommerce_product_data_tabs', 'condless_remove_tabs' );
function condless_remove_tabs( $tabs ) {
	if ( ! current_user_can( 'manage_options' ) ) {
		unset( $tabs['advanced'] );
	return( $tabs );

As you probably have noticed- the source of the numbering system is India, the West was exposed to the method only in the 11th century, and mainly through the writings of the Persian Mathematician al-Khwarizmi, which the term “algorithm” was named after him.


Advanced Options for WooCommerce

Install the plugin to add advanced options to WooCommerce.


Cities Shipping Zones for WooCommerce

Install the plugin to add an option to select cities inside shipping zones, for example to be able to set different prices per city.

Cities List

How to modify cities names?
Update countries codes, and cities codes and names:

add_filter( 'woocommerce_states', 'csz_modify_woocommerce_states', 40 );
function csz_modify_woocommerce_states( $states ) {
	$states[ 'AT' ]['AT90001'] = 'Vienna';
	return $states;

How to remove some cities from the list?
Update cities codes:

add_filter( 'woocommerce_states', 'csz_remove_woocommerce_states', 50 );
function csz_remove_woocommerce_states( $states ) {
	$unnecessary_cities = array( 'AT10101', 'AT10201', 'AT10301' );
	foreach ( $unnecessary_cities as $city ) {
		unset( $states[ substr( $city, 0, 2 ) ][ $city ] );
	return $states;

How to keep only specific cities in the list?
Update country code and cities codes:

add_filter( 'woocommerce_states', 'csz_set_woocommerce_states', 20 );
function csz_set_woocommerce_states( $states ) {
	$country = 'AT';
	$cities = array( 'AT10101', 'AT10201', 'AT10301' );
	$new_states = array();
	foreach ( $cities as $city ) {
		if ( isset( $states[ $country ][ $city ] ) ) {
			$new_states[ $city ] = $states[ $country ][ $city ];
	$states[ $country ] = $new_states;
	return $states;

How to create shipping zones for quarters inside a city?
Create shipping zone with that city and restrict to the relevant postcodes, or (what is less recommended) split the city into areas (update city code and areas names) and in case the store is located iside the city update the store location in WooCommerce settings:

add_filter( 'woocommerce_states', 'csz_split_woocommerce_states', 30 );
function csz_split_woocommerce_states( $states ) {
	$city_code = 'AT90001';
	$sub_cities = array( __( 'Northern', 'woocommerce' ), __( 'Southern', 'woocommerce' ) );
	$count = 101;
	foreach ( $sub_cities as $sub_city ) {
		$states[ substr( $city_code, 0, 2 ) ][ $city_code . $count ] = $states[ substr( $city_code, 0, 2 ) ][ $city_code ] . ' - ' . $sub_city;
	unset( $states[ substr( $city_code, 0, 2 ) ][ $city_code ] );
	return $states;

How to create cities list for unsupported country?
By its Local Census/UNLOCODE/HASC geocoded administrative divisions, cities names must be unique and without punctuation.

Which additional uses shop owners make with the customer city?
Displaying certain products (filter by city category), selling certain products (plugin that limits by state), shipping certain products (associating the products to a class without price in the relevant shipping method), applying taxes (using the city code in the state field in the settings), enabling payment / shipping methods (conditional payment / shipping plugin).

Distance Fee

How to add distance fee?
Given a (domestic) city’s distances list, will be possible to add distance based fee for the shipping rate or product price (for example- to sell moving services).

Why the tax is not calculated on the distance fee?
Enter in the shipping method cost greater than zero.

Where the configured product distance fee will be displayed?
The product the fee will be added to its price and will be displayed in the subtotal of the mini cart widget.

How I shall organize the distances list for some city?
Use as index the locations codes or names (as they appear in the dashboard and update $key_format), verify to set distance to the city itself.

Bulk Edit Tool

What is the required format?
Semicolon (;) between each city. For example: Wien; Rust; Steinbrunn

How to Modify cities in list to the required format?
Replace [\r\n]+ (regex) with ; in Notepad++.

How to enter all the locations within certain distance from a city with distances list?
Enter exclamation mark (!) followed by the city code, if necessary add minium and maximum distance seperated by semicolon (;).

  • Plugin Settings: Remove the countries.
  • WooCommerce Shipping Zones settings: Remove the locations.
  • Plugins: Deactivate and delete the plugin.
  • WooCommerce Settings: Update the store location.
  • Database: Consider to convert/erase the state field values of orders and users that were created/updated while the plugin was applied on the countries they belong to.

Mail Server Management

And Pharaoh.

Improve the successfull mail delivery rate from the server:

  • set up for the domain names: SPF, DKIM, DMARC
  • Make sure the server hostname appear at the A record, rDNS, server control panel, MTA (includes mailname), and content filter configuration values

As you probably have noticed- the first documented use of an organized courier service for the dissemination of written documents is in Egypt, where Pharaohs used couriers for the dissemination of their decrees in the territory of the State.


WordPress Restrict Access

And The Little Trump.

Grant access to product pages for visitors only via the website search form:

add_action( 'template_redirect', 'condless_redirect' );
function condless_redirect() {
	if ( ! is_user_logged_in() && is_product() && strpos( wp_get_referer(), home_url() . '/?s' ) === false && wc()->cart->get_cart_contents_count() === 0 ) {
		wp_redirect( home_url() );

Restrict submition to 1 form per email- install the pluginplugin and use:

add_filter( 'wpcf7_validate_email*', 'condless_email_validation_filter', 20, 2 );
function condless_email_validation_filter( $result, $tag ) {
	if ( Flamingo_Contact::find( array( 's' => trim( $_POST['your-email'] ) ) ) ) {
		$result->invalidate( $tag, __( 'Sorry, that email address is already used!' ) );
        return $result;

Save attachments in folder restricted to logged-in users only- install the plugin, and plugin and create .htaccesss file in the wpcf7-submissions directory that inside the uploads directory with the content:

Options -Indexes
RewriteEngine On
RewriteCond %{HTTP_COOKIE} !^.*wordpress_logged_in.*$ [NC]
RewriteRule ^(.*)$ - [R=403,L]

As you probably have noticed- unlike other WordPress default themes, the Twenty Twenty theme was written based on already existing theme, Chaplin by Anders Noren.


User Posts Limit

Install the plugin and create user posts limit.


WordPress Popups

And the Jazz Artists.

Install the plugin.

In WooCommerce notify the customer product page about discount ineligibility since purchase not enough items from it- add the Auto Open trigger, targeting the desired product id page, and the custom conditions (update the product id and the quantity for discount):

add_filter( 'pum_get_conditions', 'condless_pum_cart_product_quantity_conditions' );
function condless_pum_cart_product_quantity_conditions( $conditions ) {
        return array_merge( $conditions, array(
                'password_page_unlocked' => array(
                        'group'    => __( 'Products', 'woocommerce' ),
                        'name'     => __( 'Products', 'woocommerce' ) . ': ' . __( 'Cart', 'woocommerce' ) . ' ' . __( 'Quantity', 'woocommerce' ),
                        'callback' => 'cart_product_quantity',
        ) );
function cart_product_quantity() {
        foreach ( WC()->cart->get_cart() as $cart_item ) {
                if ( '772' === $cart_item['product_id'] && 3 > $cart_item['quantity'] ) {
                                return true;
        return false;

In WooCommerce update the customer while purchase temporary out of stock product (for simple products)- Enable the “Add To Cart button classes” and “Shortcodes” options in the plugin, create popup with the name simple_is_on_backorder1, targeting All Products, in the content insert the [current_add_to_cart] shortcode and notification about that he gonna add product which is temporary out of stock, if AJAX archive page option is enabled create another popup with trigger Click Open on .archive_is_on_backorder1 and the option “do not prevent…” and notification about that he just added product which is temporary out of stock, if not use the code:

add_filter( 'woocommerce_loop_add_to_cart_args', 'condless_add_class', 10, 2 );
function condless_add_class( $args, $product ) {
	if ( $product->is_type( 'simple' ) && $product->is_on_backorder() && ! is_product() && 'no' === get_option( 'woocommerce_enable_ajax_add_to_cart' ) ) {
		$product_id = $product->get_id();
		$args['class'] .= ' popmake-archive_backorder-' . $product_id;
		if ( isset( $product->get_availability()['availability'] ) ) $out = '<div>' . $product->get_availability()['availability'] . '</div>' . '<a href=' . $product->add_to_cart_url() . '>' . $product->add_to_cart_text() . '</a>';
		echo do_shortcode( "[popup id='archive_backorder-" . $product_id . "']" . $out . "[/popup]" );
	return $args;

As you probably have noticed- Pastorius, Carter, Valdés, and all other WordPress Version names, are names of popular jazz artists, inspired by WordPress core developers, who share a love of jazz music.


WordPress Auto Generate Post

And Back to the Future.

Create post for a user when purchase some product (update the product ID):

add_action( 'woocommerce_order_status_completed', 'condless_create_page' );
function condless_create_page( $order_id ) {
	foreach ( wc_get_order( $order_id )->get_items() as $item ) {
		if ( '9' === $item->get_product_id() ) {
			$user_id = wc_get_order( $order_id )->get_user_id();
			$user = new WP_User( $user_id );
			$user->remove_role( 'customer' );
			$user->add_role( 'author' );
			wp_insert_post( array( 'post_title' => 'My New Page', 'post_status' => 'publish', 'post_author' => $user_id, 'post_type' => 'post') );

As you probably have noticed- Jigowatt ltd, the developers of Jigoshop on which WooCommerce code is based, was named after the pronunciation mistake of the word Gigawatt in the movie Back to the Future.


Web Server Security

And Toy Story.

  • Update frequently
  • Replace passwords frequently while verifying at least 8 characters long (lower and upper case alphabets, numbers and symbols) and set up Two-Factor Authentication
  • Verify that there is a firewall and DDOS protection
  • Config the Intrusion Prevention System (enable mod_remoteip if used with reverse proxy)
  • Set up hiding of the web server details
  • Scan the server files and pass on the logs frequently
  • Use the user root only if required

Disallow SSH root connection, in /etc/ssh/sshd_config use the directive:

PermitRootLogin no

Define which logs will be saved and where in the file /etc/rsyslog.conf.

Config the intrusion prevention system Fail2ban:

  • Activate mod_remoteip (in case of reverse proxy)
  • Create the /etc/fail2ban/jail.local file and use the commands, for example to enable the recidive SSH protection:
enabled = true

enabled = true

Config multiple log files:

logpath = /var/www/clients/client12/web*/log/access.log

Unban IP with the command:

fail2ban-client set sshd unbanip $IP

Hide the Apache web server details- add the directives into /etc/apache2/apache2.conf:

ServerTokens Prod
ServerSignature Off

Hide the PHP details- add the directives into php.ini:

expose_php = off

As you probably have noticed- Buster, Strech, Jessie, and all other Debian distribution code names, are names of characters from the Toy Story movie, inspired by Bruce Ferns who worked at Pixar besides his tenure as the Debian project leader.