Login not Appending to TXT file

[wildbuddha]

function login()
{	
	$db_hostname = "localhost"; 
	$db_username = "root";
	$db_password = "";
	$db_name =     "justinalba_module3_db";
	$dbc = @mysqli_connect($db_hostname, $db_username, $db_password, $db_name)
   	 or die("Unable to connect to MySQL");
	if (isset($_POST['submitLogin'])) 
	{ 
// if form has been submitted
// makes sure they filled it in
 		if(!$_POST['userName'] | !$_POST['passwordLogin']) 
		{
 			die('You did not fill in a required field.');
	 	}
 		$query = mysqli_query($dbc,"SELECT * FROM user WHERE name_username = '".$_POST['userName']."'") or die();
	 	//Gives error if user dosen't exist
		$check = mysqli_num_rows($query);
		if ($check == 0) 
		{
 			die('That user does not exist in our database. <a href=registration.php>Click Here to Register</a>');
		}
		 while($info = mysqli_fetch_array( $query )) 	
		{
 			$_POST['passwordLogin'] = stripslashes($_POST['passwordLogin']);
 			$info['password'] = stripslashes($info['password']);
 			//gives error if the password is wrong
 			if (md5($_POST['passwordLogin']) != $info['password']) 
			{
 			die('Incorrect password, please try again.');
 			}
			else 
			{ 	
				$myFile = "test.txt";
				$fh = fopen($myFile, 'a') or die("can't open file");
				$stringData = $_POST['userName']."\n";
				fwrite($fh, $stringData);
				fclose($fh);
				session_start();
				$_SESSION['username'] = $_POST['userName'];
				header ("Location: profile.php");
			}
		}
	}
}

I'm having a problem with the above code where the file writing isn't writing to the file at all.  Any suggestions?  Thanks, in advance, for any help.

[DaveyK]

You can always do a var_dump() on fwrite to see what fwrite is returning.

 

var_dump(fwrite($fh, $stringData));

[ginerjm]

Your comment says that your query statement gives error if it fails. But you don't show an error message with simply 'or die()'. Try adding some text to the die and see if it says something. Then add some other echos in the following code to check your progress so you can see how far you are getting and debug your problem.

 

Also - turn on error checking. It will help you debug some other errors. For ex., you have an if statement at the top with a '|' in it, which is not a proper logical connector. ('OR' is usually '||')