count.php

<?php
define("DOUBLE_SLASH", "//");

$workingCode = 0;
$commentCode = 0;

$fp = fopen("index.html", "r");

while ($line = fgets($fp)) {
    if (strstr($line, "//")) $commentCode++;
    else $workingCode++;

}
echo 'Comment code ' . $commentCode . ' lines  ';
echo 'Working code ' . $workingCode . ' lines';

?>