rhdwp-environment.php

<?php
/**
 * Plugin Name: RHD Environment
 * Description: Enables automatic updates and SMTP email via PHPMailer.
 * Author: Roundhouse Designs
 * Author URI: https://roundhouse-designs.com
 *
 * @package rhdwp
 */

/**
 * Set the true visitor IP.
 */
function rhd_set_real_ip() {
	$ip_addr = null;

	// Check for Cloudflare
	if ( ! empty( $_SERVER['HTTP_CF_CONNECTING_IP'] ) ) {
		$ips     = explode( ',', $_SERVER['HTTP_CF_CONNECTING_IP'] );
		$ip_addr = trim( $ips[0] );
	}

	// Check X-Real-IP header (Working with Traefik...)
	elseif ( ! empty( $_SERVER['X_REAL_IP'] ) ) {
		$ip_addr = trim( $_SERVER['X_REAL_IP'] );
	} elseif ( ! empty( $_SERVER['HTTP_X_REAL_IP'] ) ) {
		$ip_addr = trim( $_SERVER['HTTP_X_REAL_IP'] );
	}

	// Check X-Forwarded-For
	elseif ( ! empty( $_SERVER['X_FORWARDED_FOR'] ) ) {
		$ips     = explode( ',', $_SERVER['X_FORWARDED_FOR'] );
		$ip_addr = trim( $ips[0] );
	} elseif ( ! empty( $_SERVER['HTTP_X_FORWARDED_FOR'] ) ) {
		$ips     = explode( ',', $_SERVER['HTTP_X_FORWARDED_FOR'] );
		$ip_addr = trim( $ips[0] );
	}

	$_SERVER['REMOTE_ADDR'] = $ip_addr;
}
// First available hook.
add_action( 'mu_plugin_loaded', 'rhd_set_real_ip' );

/**
 * Trims both single and double quotes from strings.
 *
 * @param string $string The string to filter.
 * @return string The filtered string.
 */
function rhd_trim_quotes( string $string ) {
	return trim( trim( $string, "'" ), '"' );
}

/**
 * Auto-updates.
 */
add_filter( 'allow_minor_auto_core_updates', '__return_true' );
add_filter( 'auto_update_plugin', '__return_true' );
add_filter( 'auto_update_theme', '__return_true' );

/**
 * Disable auto-update emails.
 */
add_filter( 'auto_core_update_send_email', '__return_false' );
add_filter( 'auto_plugin_update_send_email', '__return_false' );
add_filter( 'auto_theme_update_send_email', '__return_false' );

/**
 * Set the proper FROM address.
 *
 * @param string $email The FROM address.
 * @return string The filtered email address.
 */
function rhd_mail_from( $email ) {
	return rhd_trim_quotes( getenv( 'WORDPRESS_SMTP_FROM' ) );
}
add_filter( 'wp_mail_from', 'rhd_mail_from', 10, 1 );

/**
 * Sets up the custom PHP mailer to connect MailGun to WP.
 *
 * @param PHPMailer $phpmailer The PHPMailer object.
 * @return void
 */
function rhd_phpmail( $phpmailer ) {
	$host      = getenv( 'WORDPRESS_SMTP_HOST' );
	$username  = getenv( 'WORDPRESS_SMTP_USERNAME' );
	$password  = getenv( 'WORDPRESS_SMTP_PASSWORD' );
	$from      = rhd_trim_quotes( getenv( 'WORDPRESS_SMTP_FROM' ) );
	$from_name = rhd_trim_quotes( getenv( 'WORDPRESS_SMTP_FROM_NAME' ) );

	$phpmailer->isSMTP();
	// phpcs:disable
	$phpmailer->Host        = $host;
	$phpmailer->SMTPAutoTLS = true;
	$phpmailer->SMTPAuth    = true;
	$phpmailer->Port        = 587;
	$phpmailer->Username    = $username;
	$phpmailer->Password    = $password;

	// Additional settings
	$phpmailer->SMTPSecure = 'tls';
	$phpmailer->From       = $from;
	$phpmailer->FromName   = $from_name;
	// phpcs:enable
}
add_action( 'phpmailer_init', 'rhd_phpmail', 10, 1 );

/**
 * Disable Admin Notification of User Password Change.
 *
 * @see pluggable.php
 */
if ( ! function_exists( 'wp_password_change_notification' ) ) {
	function wp_password_change_notification( $user ) {
		return;
	}
}