Disable plugin updates WordPress

disable-plugin-update-mu.php

<?php

// Return zero updates and current time as last checked time
function __disable_wp_updates() {
	include ABSPATH . WPINC . '/version.php';
	return (object) array(
		'updates' => array(),
		'version_checked' => $wp_version,
		'last_checked' => time(),
	);
}

// Disable Plugin Updates
remove_action( 'load-update-core.php', 'wp_update_plugins' );
remove_action( 'load-plugins.php', 'wp_update_plugins' );
remove_action( 'load-update.php', 'wp_update_plugins' );
remove_action( 'wp_update_plugins', 'wp_update_plugins' );
add_filter( 'pre_site_transient_update_plugins', '__disable_wp_updates' );

// Disable Theme Updates
remove_action( 'load-update-core.php', 'wp_update_themes' );
remove_action( 'load-themes.php', 'wp_update_themes' );
remove_action( 'load-update.php', 'wp_update_themes' );
remove_action( 'wp_update_themes', 'wp_update_themes' );
add_filter( 'pre_site_transient_update_themes', '__disable_wp_updates' );