<?
$counterFile = "visitas.txt";

function displayCounter($counterFile) {
$fp = fopen($counterFile,rw);
$num = fgets($fp,5);
$num += 1;
//print "$num";
exec( "rm -rf $counterFile");
exec( "echo $num > $counterFile");
}
if (!file_exists($counterFile)) {
exec( "echo 1 > $counterFile");
}
displayCounter($counterFile);

	header ("location: ./principal.php");
	
?>