count กลับมา Reset เป็น 0 เอง

<?php
session_start();
$wantcount = true; 
$counter_file = "counter/counter.txt";
if($wantcount){
if (file_exists($counter_file) and is_writeable($counter_file)){
$fp = fopen($counter_file,"r+") or die("Read File Error !");
$count = fread($fp, filesize($counter_file));
fclose($fp);
if(!isset($_SESSION["First"]))
{
	$fp = fopen($counter_file,"w+") or die("Write File Error !");
	$count +=1;
	$count =$count;
	fputs($fp, $count);
	fclose($fp);
	$_SESSION["First"] = "1";
}
echo "$count";
}
}
?>