PHP Count Files In Folder / Directory

<?php
    $i = 0;
    $dir = 'images/';
    if ($handle = opendir($dir)) {
        while (($file = readdir($handle)) !== false){
            if (!in_array($file, array('.', '..')) && !is_dir($dir.$file))
                $i++;
        }
    }
echo $i;
?>