MU-plugin to prevent production functionality on development sites.

is-dev-env.php

<?php
/**
 * Plugin Name: Development Environment Preventions
 * Description: MU-plugin to prevent production functionality on development sites.
 * Plugin URI: https://gist.github.com/crstauf/793d8d70dd6d2572e698f8b46ab6316b
 * Author: Caleb Stauffer
 * Author URI: https://develop.calebstauffer.com
 */

$production_site_url = '{PRODUCTION SITE URL}';
$dev_email_address = '{DEV EMAIL ADDRESS}';
$apply_preventions = false;

if ( '{PRODUCTION SITE URL}' === $production_site_url )
	trigger_error( 'Update $production_site_url in ' . __FILE__ );

if ( '{DEV EMAIL ADDRESS}' === $dev_email_address )
	trigger_error( 'Update $dev_email_address in ' . __FILE__ );

if ( defined( 'WP_LOCAL_DEV' ) && WP_LOCAL_DEV ) $apply_preventions = true;
if ( defined( 'WP_DEVELOP'   ) && WP_DEVELOP   ) $apply_preventions = true;
if ( get_site_url() !== $production_site_url   ) $apply_preventions = true;

if ( !$apply_preventions ) {

	/**
	 * Add inactive status indication to mu-plugin row meta.
	 */
	add_filter( 'plugin_row_meta', function ( $meta, $plugin_file ) {
		if ( basename( __FILE__ ) !== $plugin_file )
			return $meta;
			
		array_unshift( $meta, '<strong>Inactive</strong>' );
		return $meta;
	}, 10, 2 );

	return;

}


/*
##    ##  #######  ######## ####  ######  ########  ######
###   ## ##     ##    ##     ##  ##    ## ##       ##    ##
####  ## ##     ##    ##     ##  ##       ##       ##
## ## ## ##     ##    ##     ##  ##       ######    ######
##  #### ##     ##    ##     ##  ##       ##             ##
##   ### ##     ##    ##     ##  ##    ## ##       ##    ##
##    ##  #######     ##    ####  ######  ########  ######
*/

/**
 * Add a notice in admin so we're aware of the preventions.
 */
add_action( 'admin_notices', function() {
	echo '<div class="notice notice-warning">' . 
		'<p>Behavior modification by <code>' . __FILE__ . '</code>; site is identified as development environment.</p>' . 
	'</div>';
}, -999 );

/**
 * Add active status indication to mu-plugin row meta.
 */
add_filter( 'plugin_row_meta', function ( $meta, $plugin_file ) {
	if ( basename( __FILE__ ) !== $plugin_file )
		return $meta;
		
	array_unshift( $meta, '<strong style="color: red;">!!! ACTIVE !!!</strong>' );
	return $meta;
}, 10, 2 );


/*
########  ########  ######## ##     ## ######## ##    ## ######## ####  #######  ##    ##  ######
##     ## ##     ## ##       ##     ## ##       ###   ##    ##     ##  ##     ## ###   ## ##    ##
##     ## ##     ## ##       ##     ## ##       ####  ##    ##     ##  ##     ## ####  ## ##
########  ########  ######   ##     ## ######   ## ## ##    ##     ##  ##     ## ## ## ##  ######
##        ##   ##   ##        ##   ##  ##       ##  ####    ##     ##  ##     ## ##  ####       ##
##        ##    ##  ##         ## ##   ##       ##   ###    ##     ##  ##     ## ##   ### ##    ##
##        ##     ## ########    ###    ######## ##    ##    ##    ####  #######  ##    ##  ######
*/

// set staging constant for Square payment gateway
define( 'WC_SQUARE_ENABLE_STAGING', true );

/**
 * Override WordPress admin email.
 */
add_filter(      'pre_option_admin_email', function ( $email_address ) use ( $dev_email_address ) { return $dev_email_address; } );
add_filter( 'pre_site_option_admin_email', function ( $email_address ) use ( $dev_email_address ) { return $dev_email_address; } );

/**
 * Direct all emails to development (prevent emails to customers).
 */
add_filter( 'wp_mail', function ( $args ) use ( $dev_email_address ) { $args['to'] = $dev_email_address; return $args; }, 999 );

/**
 * Prevent running of AutomateWoo workflows.
 * @link https://automatewoo.com/ Plugin site.
 * @see AutomateWoo\Workflow::run()
 * @since AutomateWoo 2.6.6
 */
define( 'AW_PREVENT_WORKFLOWS', true );

/** 
 * Prevent WooCommerce Subscription renewals.
 * @link https://woocommerce.com/products/woocommerce-subscriptions/ Plugin site.
 * @see WC_Subscriptions::is_duplicate_site()
 */
add_filter( 'woocommerce_subscriptions_is_duplicate_site', '__return_true' );

/**
 * Prevent processing of AutomateWoo workflows.
 * @link https://automatewoo.com/ Plugin site.
 * @see AutomateWoo\Workflow::validate_workflow()
 */
add_filter( 'automatewoo_custom_validate_workflow', '__return_false' );

?>