";
print "Opening user file... ";
$user = fopen("username.txt", "r+") or die("Unable to open file!");
if ($user){
print "Done
";
print "Verifying user identity... ";
while (!feof($user)) {
$buffer = str_replace(" ", "", fgets($user, 4096));
if($buffer == $_GET['user'].""){
echo 'Error : User name already exist!';
fclose($user);
exit;
}
}
print "Done
";
print "Inserting user...";
$userString = "\r\n".$usr;
if (fwrite($user, $userString) === FALSE) {
echo "Cannot write to file username.txt";
exit;
}
print "Done!
";
fclose($user);
}
?>