PHP sessions question

Discussion in 'PHP' started by enchance, Oct 3, 2009.

0
  1. #1
    I've only started to use php sessions but I keep getting an error. Can someone tell me why my code below doesn't work? Firefox says my problem is in line 21 which is header ("Location: http://localhost/labs/php_sessions/page2.php"); but how can that be? :confused:

    I simplified the markup and made the PHP in bold so it's easier to see:
    
[B]<?php
session_start();
if($_POST['pass'] == '123'){
	$_SESSION['login'] = true;	
}
else {
	$_SESSION['login'] = false;
}
?>[/B]

<html>
<head></head>

<body>
[B]<?php
if($_SESSION['login']){
	header ("Location: http://localhost/labs/php_sessions/page2.php");
	exit();
}
else {
?>[/B]
<form action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post">
<input name="pass" type="password" /><input name="" type="submit" />
</form>
[B]<?php
}
?>[/B]
</body>


</html>
    Code (markup):
    And just in case, here's the actual error message
    
Warning: Cannot modify header information - headers already sent by (output started at D:\xampp\htdocs\labs\php_sessions\index.php:19) in D:\xampp\htdocs\labs\php_sessions\index.php on line 21
    HTML:
     
    enchance, Oct 3, 2009 IP
  2. Oli3L

    Oli3L Active Member

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    #2
    try this code:

    
<?php
ob_start();
session_start();
if($_POST['pass'] == '123'){
	$_SESSION['login'] = true;	
}
else {
	$_SESSION['login'] = false;
}
?>

<html>
<head></head>

<body>
<?php
if($_SESSION['login']){
	header ("Location: http://localhost/labs/php_sessions/page2.php");
	exit();
}
else {
?>
<form action="<?php echo $_SERVER['PHP_SELF'] ?>" method="post">
<input name="pass" type="password" /><input name="" type="submit" />
</form>
<?php
}
?>
</body>


</html>
<?php
ob_flush();
?>
    PHP:
     
    Oli3L, Oct 3, 2009 IP
  3. goliath

    goliath Active Member

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    #3
    The problem is your sequence, the message is very literal.

    because you have already sent your <HTML> and <HEAD> you can not send any more headers. As soon as a character is sent as content the headers are over.

    instead of this
    try this:
    That will fix it for you.
     
    goliath, Oct 3, 2009 IP