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<?php

/*
Plugin Name: Don't Update Some Plugins
Plugin URI: https://wpbeaches.com
Description: This doesn't update some plugins
Author: Neil Gowran
Author URI: https://wpbeaches.com
License: GPL2
*/



add_filter( 'auto_update_plugin', 'do_not_auto_update_specific_plugins', 10, 2 );
// Don't update some plugins
function do_not_auto_update_specific_plugins ( $update, $item ) {
    // Array of plugin slugs to never auto-update
    $plugins = array ( 
        'akismet',
        'duplicator',
    );
    if ( in_array( $item->slug, $plugins ) ) {
        return false; // Never update plugins in this array
    } else {
        return true; // Else update the rest
    }
}