Mandrill: wp_mail has been declared by another process

[will8688]

Hi I get this error when I turn your plugin on and it stops ALL emails from being sent out.

Mandrill: wp_mail has been declared by another process or plugin, so you won't be able to use Mandrill until the problem is solved.

WordPress Version 5.5.2 PHP7

Please advise

Thanks

[froger-me]

Hi @will8688 , WPRUS does not override wp_mail. Could you clarify which plugin triggers this message specifically? This is not a WordPress core message.

[froger-me]

Hi @will8688 , I found the source of the problem by digging into similar issues other plugins experienced. A fix will be deployed for version 1.2.8 - in the meantime, feel free to edit wp-content/wp-remote-users-sync/wprus.php and replace the code with the following (will be ovewritten when 1.2.8 is out):

<?php
/*
Plugin Name: WP Remote Users Sync
Plugin URI: https://github.com/froger-me/wp-remote-users-sync
Description: Synchronise WordPress Users across Multiple Sites.
Version: 1.2.7
Author: Alexandre Froger
Author URI: https://froger.me/
Text Domain: wprus
Domain Path: /languages
*/

if ( ! defined( 'ABSPATH' ) ) {
    exit; // Exit if accessed directly
}

if ( ! defined( 'WPRUS_PLUGIN_PATH' ) ) {
    define( 'WPRUS_PLUGIN_PATH', plugin_dir_path( __FILE__ ) );
}

if ( ! defined( 'WPRUS_PLUGIN_URL' ) ) {
    define( 'WPRUS_PLUGIN_URL', plugin_dir_url( __FILE__ ) );
}

require_once WPRUS_PLUGIN_PATH . 'functions.php';
require_once WPRUS_PLUGIN_PATH . 'inc/class-wprus.php';

register_activation_hook( __FILE__, array( 'Wprus', 'activate' ) );
register_deactivation_hook( __FILE__, array( 'Wprus', 'deactivate' ) );

function wprus_run() {
    require_once ABSPATH . 'wp-includes/pluggable.php';
    require_once ABSPATH . 'wp-admin/includes/plugin.php';
    require_once ABSPATH . 'wp-admin/includes/user.php';
    require_once ABSPATH . 'wp-admin/includes/file.php';
    require_once WPRUS_PLUGIN_PATH . 'inc/class-wprus-logger.php';
    require_once WPRUS_PLUGIN_PATH . 'inc/class-wprus-settings.php';
    require_once WPRUS_PLUGIN_PATH . 'inc/api/class-wprus-api-abstract.php';
    require_once WPRUS_PLUGIN_PATH . 'inc/integration/class-wprus-integration.php';

    do_action( 'wprus_init' );
    Wprus_Integration::init();

    $settings       = new Wprus_Settings( true );
    $settings_class = get_class( $settings );

    if ( $settings->validate() ) {
        require_once WPRUS_PLUGIN_PATH . 'inc/class-wprus-crypto.php';
        require_once WPRUS_PLUGIN_PATH . 'inc/class-wprus-nonce.php';
        require_once WPRUS_PLUGIN_PATH . 'inc/class-wprus-import-export.php';

        $encryption_settings = $settings_class::get_option( 'encryption' );

        Wprus_Nonce::init( false, true, $encryption_settings['token_expiry'] );

        $wprus_logger = new Wprus_Logger( $settings, true );

        do_action( 'wprus_loaded' );

        $api                   = array();
        $enabled_api_endpoints = apply_filters(
            'wprus_enabled_api_endpoints',
            array(
                'login',
                'logout',
                'create',
                'update',
                'delete',
                'password',
                'role',
                'meta',
            )
        );

        foreach ( $enabled_api_endpoints as $api_endpoint ) {
            $api_endpoint_parts    = explode( '-', $api_endpoint );
            $api_endpoint_parts    = array_map( 'ucfirst', $api_endpoint_parts );
            $api_handler_classname = 'Wprus_Api_' . implode( '_', $api_endpoint_parts );
            $api_handler_path      = WPRUS_PLUGIN_PATH . 'inc/api/class-wprus-api-' . $api_endpoint . '.php';

            if (
                ! class_exists( $api_handler_classname ) &&
                is_file( $api_handler_path )
            ) {
                require_once $api_handler_path;

                $api[ $api_endpoint ] = new $api_handler_classname( $api_endpoint, $settings, true );
            } else {
                $api[ $api_endpoint ] = apply_filters( 'wprus_api_endpoint', false, $api_endpoint, $settings );
            }
        }

        $api        = apply_filters( 'wprus_api', $api );
        $api_update = isset( $api['update'] ) ? $api['update'] : false;
        $api_create = isset( $api['create'] ) ? $api['create'] : false;

        if ( $api_create && isset( $api['role'] ) ) {
            $api_create->init_role_handler( $api['role'] );
        }

        if ( $api_update && isset( $api['role'] ) ) {
            $api_update->init_role_handler( $api['role'] );
        }

        if ( $api_create && isset( $api['password'] ) ) {
            $api_create->init_password_handler( $api['password'] );
        }

        if ( $api_update && isset( $api['password'] ) ) {
            $api_update->init_password_handler( $api['password'] );
        }

        $wprus_import_export = new Wprus_Import_Export( true );
        $wprus               = new Wprus( $settings, true );

        do_action( 'wprus_ready', $wprus, $api, $settings, $wprus_logger );
    }
}
add_action( 'plugins_loaded', 'wprus_run', 10, 0 );

[will8688]

was it pluggable being loaded in wrong place?

[froger-me]

You could say that for the sake of simplicity - or more accurately, it is a conflict between WPRUS loading pluggable early, and other plugins being loaded after WPRUS and attempting to override a pluggable function. It's more of a compatibility conflict than a hard bug per se, and the change optimizes compatibility between plugins.