$fp = file("log.dat"); // leggo il file
foreach ($fp as $line) {
$info = explode("|", $line);
$name = trim($info[0]);
$password = trim($info[1]);
$arr[$name] = $password;
}
if(isset($_POST['name']))
{
$postName = $_POST['name'];
$postPass = $_POST['pass'];
if(empty($_POST['name']) || empty($_POST['pass']))
{
echo "Tutti i campi sono obbligatori";
}
else
{
if($arr[$postName]==$postPass)
{
echo "Good !";
}
else
{
echo "Nice Try

";
}
}
}
?>
<form method="post" name="frm">
<input name="name" type="text">
<input name="pass" type="password">
<input name="submit" type="submit" value="submit">
</form>