";
//Get user input and build text to be stored in file
$guestEmail = strip_tags($_POST['email']);
$messageText = "
$guestName : ";
$messageText = $messageText . strip_tags($_POST['message']) . PHP_EOL;
//open file to append text to the file
$fp = fopen("gb.dat", "ab");
if ( !fp )
die("Can not open file");
//lock file for writing
flock($fp, LOCK_EX) or die ("Can not lock file");
fwrite($fp, $messageText);
fclose($fp); //This also releases the lock on file
$_POST['guestname'] = $_POST['email'] = $_POST['message'] = "";
//to make sure current values are not used in case user clicks
//the submit button without providing any values
}
elseif ($_POST['submitButton'])
print "
Please provide complete information ";
?>
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