[SOLVED] Warning: Cannot modify header information????????????????

[cluce]

All I did was add the sql insert command because I want to record the date/time every time soneone logs on and now I am getting these warnings and I can't get rid of them. This was code was working before I did that. This is driving me bannanas. Can someone please tell me whats going on??

 

Here are my errors...

 

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at C:\wamp\www\userlogin.php:1) in C:\wamp\www\userlogin.php on line 4

 

Warning: Cannot modify header information - headers already sent by (output started at C:\wamp\www\userlogin.php:1) in C:\wamp\www\userlogin.php on line 50

 

 

here is my code...

 <?php
//initialize the session
if (!isset($_SESSION)) {
  session_start();
}

//check for required fields from the form
if ((!isset($_POST["username"])) || (!isset($_POST["password"]))) {
	header("Location: user_logon.html");
exit;
}

//connect to server and select database
$mysqli = mysqli_connect("localhost", "root", "", "test");



//create and issue the query
$sql = "SELECT f_name, l_name FROM auth_users WHERE username = '".$_POST["username"]."' AND password = PASSWORD('".$_POST["password"]."')";

$result = mysqli_query($mysqli, $sql) or die(mysqli_error($mysqli));



//get the number of rows in the result set; should be 1 if a match
if (mysqli_num_rows($result) == 1) {



//if authorized, get the values of f_name l_name
while ($info = mysqli_fetch_array($result)) {
	$f_name = stripslashes($info['f_name']);
	$l_name = stripslashes($info['l_name']);
}


//set authorization cookie
setcookie("auth", "1", 0, "/", "yourdomain.com", 0);
$_SESSION['usersname'] = $f_name . " " . $l_name;

//records logon event 
//$sql = "INSERT INTO Events (user, Date) VALUES ('".$_POST['username']."')";

//directs authorized user
header("Location: logon.php");

} else {
//redirect back to login form if not authorized
$_SESSION['error'] =  "<font color='red'>Invalid username and/or password combination</font>"; 
header("Location: user_logon.php");
exit;
}
?>

[per1os]

Make sure there are no "white" spaces at the top of the page, I would copy and paste it into notepad just to be sure there is nothing getting added to the top. For example this would throw an error:

 

--note this space here will throw an error
<?php

?>

 

I would check that first.

 

 

 

[cluce]

I am not sure what was the problem here. I just used my orignal login.php page before I made changes to it.