ผมมีโค๊ด counter อยู่แล้วน่ะครับ แต่จะสอบถามว่าทำไมกด Refresh ทีไร มันเพิ่มขึ้นตลอด

$wantcount = true; 
$counter_file = ".../pis_hr/counter/counter.txt";
if($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);
$fp = fopen($counter_file,"w+") or die("Write File Error !");
$count +=1;
$count =$count;
fputs($fp, $count);
fclose($fp);
echo "$count";
}
}