1. download pclzip.lib.php di http://www.phpconcept.net/pclzip/pclzip-downloads

2. untuk bakcup 1 create folder backup dan create file archive.zip

<?php
    // Include the PclZip library
    require_once(’pclzip.lib.php’);
 
    // Set the arhive filename
    $archive = new PclZip(’backup/archive.zip’);
 
    // Set the dir to archive
    $v_dir = dirname(getcwd()); // or dirname(__FILE__);
    $v_remove = $v_dir;
 
    // Create the archive
    $v_list = $archive->create($v_dir, PCLZIP_OPT_REMOVE_PATH, $v_remove);
    if ($v_list == 0) {
        die("Error : ".$archive->errorInfo(true));
    }
?>

sumber http://campstamba.com/2010/12/create-your-own-php-backup-solution-complete-tutorial-with-source-files/