auto-update-enabler.php

<?php
/**
 * Auto-Update Enabler
 *
 * Decisions, not options. Inspired by Trac ticket #58389 by
 * Jos Velasco and an offhanded comment on the fedi by Andy
 * Fragen.
 *
 * @package Auto-Update Enabler
 * @author  Jason Cosper <boogah@gmail.com>
 * @license https://www.gnu.org/licenses/gpl-2.0.txt GPL-2.0+
 * @link    https://gist.github.com/boogah/8209b99cddcb5bb4024382c011745da9
 *
 * @wordpress-plugin
 * Plugin Name:       Auto-Update Enabler
 * Version:           1.0
 * Requires at least: 6.0
 * Requires PHP:      7.4
 * Author:            Jason Cosper
 * Author URI:        https://jasoncosper.com/
 * License:           GPL-2.0+
 * License URI:       https://www.gnu.org/licenses/gpl-2.0.txt
 * Description:       Enables auto-updates for plugins by default when plugins are installed or activated.
 * Gist Plugin URI:   https://gist.github.com/boogah/8209b99cddcb5bb4024382c011745da9
 */

// If this file is called directly, abort.
if (! defined('WPINC') ) {
    die;
}

// Add an action hook during the plugin installation process.
add_action('upgrader_process_complete', 'auto_update_enabler_install_plugin', 10, 2);

/**
 * upgrader_process_complete hook callback function.
 *
 * @param WP_Upgrader $upgrader    WP_Upgrader instance. Might be a Theme_Upgrader, Plugin_Upgrader, Core_Upgrade, or Language_Pack_Upgrader instance.
 * @param array       $hook_extra  Array of bulk item update data.
 */
function auto_update_enabler_install_plugin($upgrader, $hook_extra)
{
    if ($hook_extra['action'] == 'install' && $hook_extra['type'] == 'plugin') {
        $plugin_path = $upgrader->plugin_info();
        
        // Check if the auto_update_plugins option exists.
        if (!get_option('auto_update_plugins')) {
            add_option('auto_update_plugins', array());
        }

        // Add the plugin to the auto-update list.
        $current = get_option('auto_update_plugins', array());
        if (!in_array($plugin_path, $current, true)) {
            $current[] = $plugin_path;

            // Update the auto-update plugins option.
            update_option('auto_update_plugins', $current);
        }
    }
}

// Add an action hook during the plugin activation process.
add_action( 'activate_plugin', 'auto_update_enabler_activate_plugin', 10, 2 );

/**
 * activate_plugin hook callback function.
 *
 * @param string $plugin    The plugin file.
 * @param bool   $network   Whether the plugin is being activated network-wide.
 */
function auto_update_enabler_activate_plugin( $plugin, $network ) {
    // Check if the plugin is activated in the Plugins > Add New section.
    if ( ! $network && is_admin() && isset( $_GET['plugin'] ) && isset( $_GET['_wpnonce'] ) ) {
        // Verify the security nonce.
        if ( ! wp_verify_nonce( $_GET['_wpnonce'], 'activate-plugin_' . $_GET['plugin'] ) ) {
            return;
        }

        // Check if the $_GET variables are set.
        if ( ! isset( $_GET['plugin'] ) || ! isset( $_GET['_wpnonce'] ) ) {
            return;
        }

        // Check if the auto_update_plugins option exists.
        if ( ! get_option( 'auto_update_plugins' ) ) {
            add_option( 'auto_update_plugins', array() );
        }

        // Add the plugin to the auto-update list.
        $current = get_option( 'auto_update_plugins', array() );
        $current[] = $plugin;

        // Update the auto-update plugins option.
        update_option( 'auto_update_plugins', $current );
    }
}

/**
 * Enable auto-updates for a plugin.
 *
 * @param string $plugin    The plugin file.
 */
function auto_update_enabler_plugin( $plugin ) {
    // Do nothing if the auto_update_plugins option does not exist.
    if ( ! get_option( 'auto_update_plugins' ) ) {
        return;
    }

    // Check if the plugin is already in the auto-update list.
    $current = get_option( 'auto_update_plugins', array() );
    if ( in_array( $plugin, $current, true ) ) {
        return;
    }

    // Add the plugin to the auto-update list.
    $current[] = $plugin;

    // Update the auto-update plugins option.
    update_option( 'auto_update_plugins', $current );
}