The simplest form of a counter

[Daniel_Mott]

I needed a very simple counter and made this code. Is there any optimizations to be made?

<?php
                 $file  = fopen ("snok.dat", "r+");
                 $count = fread  ($file, 8);
                 $count = $count + 1;
                 ftruncate ($file, 0);
                 rewind ($file);
                 fwrite ($file, $count);
                 fclose ($file);
                 echo $count;
?>