Convert a WordPress plugin from a network activated state to a site activated one.

disable-plugin.php

<?php
/**
 * Convert a plugin from a network activated state to a site activated one.
 *
 * On a multisite WordPress installation, there is no simple way to deactivate a
 * network activated plugin while leaving it active on one or two sites, unless
 * the plugin was activated first on a site and then activated across the
 * network. This script will convert the plugin from a network activated state
 * to a site activated one. After running this script, we can then individually
 * disable the plugin from sites that do not need it.
 *
 * To run this script,
 * wp eval-file disable-plugin.php
 *
 * @package WPCustomStandAloneFunction
 */

global $wpdb;
// phpcs:ignore
$blogs = $wpdb->get_col( "SELECT blog_id FROM $wpdb->blogs;" );
// Modify this as needed.
$plugins_to_activate = array(
	'events-calendar-pro',
	'the-events-calendar',
	'gravityforms',
);
foreach ( $blogs as $blog_id_number ) {
	switch_to_blog( $blog_id_number );
	foreach ( $plugins_to_activate as $plugin_name ) {
		activate_plugin( $plugin_name . '/' . $plugin_name . '.php' );
	}
	restore_current_blog();
}

printf( 'Plugin has been activated on %d blogs.', count( $blogs ) );