Contare file in una directory

[Albertorrr]

$a=0;

if ($handle = opendir('.')) {
   while (false !== ($file = readdir($handle))) { 
       if ($file != "." && $file != "..") { 
           echo "$file\n"; 
        $a++;
       } 
   }
   closedir($handle); 
}

echo $a;

Penso funga