Source: copy_dir.phps - download

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<?php

copy_dir('dir_name','dir_name_copy');

function copy_dir($path, $new_path){
    if (is_dir($path)) {
        mkdir($new_path);
        if ($dh = opendir($path)) {
            while (($entry = readdir($dh)) !== false) {
                if($entry!='.' && $entry!='..') {
                    if (is_dir($path.'/'.$entry)) {
                        copy_dir($path.'/'.$entry, $new_path.'/'.$entry);
                    } else {
                        copy($path.'/'.$entry, $new_path.'/'.$entry);
                    }
                }
            }
        }
    }
}

?>