Help in PHP!!

[*seether*]

I jez want to know what this means... I'm building a shopping cart with a registration form in it... It's working though, but what's up with those warnings?!..... HELP!!

Warning: Cannot send session cookie - headers already sent by (output started at /home/virtual/site68/fst/var/www/html/register.php:2) in /home/virtual/site68/fst/var/www/html/register.php on line 4

Warning: Cannot send session cache limiter - headers already sent (output started at /home/virtual/site68/fst/var/www/html/register.php:2) in /home/virtual/site68/fst/var/www/html/register.php on line 4
Ok!
Warning: Cannot add header information - headers already sent by (output started at /home/virtual/site68/fst/var/www/html/register.php:2) in /home/virtual/site68/fst/var/www/html/register.php on line 59
Thanks! You have been registered.


Here's my register.php code...

<?php
session_start();


$hostname_mysql = "MyLocalhost";
$database_mysql = "MyDatabase";
$username_mysql = "blah";
$password_mysql = "blah";
$mysql = mysql_pconnect("$hostname_mysql", "$username_mysql", "$password_mysql") or die(mysql_error());
if (!$mysql)
{
echo "Couldn't make a connection!";
exit;
}

$db = mysql_select_db("$database_mysql",$mysql);
if(!$db)
{
echo "The database disappeared!";
mysql_close($mysql);
exit;
}
echo"Ok!";
if (empty($memberpass)|| empty($memberpass2)||empty($username)||empty($email))
{
die("Error! All fields are required. Please try again!");
}

if ($memberpass != $memberpass2)
{
die ("Error! Passwords do not match. Please try again!");
}

if(!eregi('^([._a-z0-9-]+[._a-z0-9-]*)@(([a-z0-9-]+\.)*([a-z0-9-]+)(\.[a-z]{2,3})?)$',$email))
{
die("Error! $email does not look like valid email address.");
}

if (strlen($username)<2 || strlen($usrname)>50)
{
die ("Error! $username must be between 1 to 50 characters");
}

if (strlen($memberpass)<6||strlen($memberpass)>10)
{
die("Error! Password must be between 6 to 10 characters.");
}

$enc_pass = md5($memberpass);
$query = "INSERT into members (member_id,username,email,memberpass) VALUES ('','$username','$email','$enc_pass')";
$result= mysql_query($query) or die
("Could not execute query: $query." .mysql_error());

if ($result)
{
session_register($username);
setcookie("siteuser",$username,time()+604800);
echo "Thanks! You have been registered.";

}
?>

[website]

yes, you mustn't send out anything before you write cookies, so

echo"Ok!"; 

may not be there.
And perhaps something else...

Just no html/text before messing with cookies

[datune]

The answer as to why those errors are listed was given by website, but i thought i could tell you how to prevent them even if using output before sending them.

One of the most powerfull things in PHP (which really is your very best friend, or soon will be), is Output Buffering.

Now i'm not going to delve into it, but for example just do the following

<?php
// your php file begins here
ob_start();

// all of your code resides here

//the end of your file
ob_end_flush();
?>

No more errors [img]images/smilies/wink.gif[/img]

But please, before really using output buffering, read up on it over at php.net and do a search php+output+buffering.

Hope this helps[img]images/smilies/wink.gif[/img]

[website]

The answer as to why those errors are listed was given by website, but i thought i could tell you how to prevent them even if using output before sending them.

One of the most powerfull things in PHP (which really is your very best friend, or soon will be), is Output Buffering.

Now i'm not going to delve into it, but for example just do the following

<?php
// your php file begins here
ob_start();

// all of your code resides here

//the end of your file
ob_end_flush();
?>

No more errors [img]images/smilies/wink.gif[/img]

But please, before really using output buffering, read up on it over at php.net and do a search php+output+buffering.

Hope this helps[img]images/smilies/wink.gif[/img]

oh man, this I didn't know, this is great, I had been creating my custom classes to do almost the exact thing and it already exists, great! Thanks a lot!

[PHP John]

Can someone tell me why you would want to use output buffering?

[*seether*]

<?php
// your php file begins here
ob_start();

// all of your code resides here

//the end of your file
ob_end_flush();
?>

No more errors [img]images/smilies/wink.gif[/img]

But please, before really using output buffering, read up on it over at php.net and do a search php+output+buffering.

Hope this helps[img]images/smilies/wink.gif[/img]

Hi! Like where would I put the ob_start(); and ob_end_flush(); in my code?!.... Coz I tried to put it in between my codes... and still there are some warnings....

[Cam]

On the most part output buffering is used by slack people so they don't have to code around the fact that you can't send anything to the browser before headers/cookies.

I'm sure they probably have a better use than that but I don't know any. Maybe I'm not thinking outside the box...

[website]

Hi! Like where would I put the ob_start(); and ob_end_flush(); in my code?!.... Coz I tried to put it in between my codes... and still there are some warnings....

You would place ob_start(); at the top of your script, and ob_end_flush(); at the bottom.

Packman:
Well, it does save you a lot of (ugly) work, but ofcourse you could simply design your code not to output anything until in the end...

I guess this is also good for caching because you can save the output to a file and then simply load the file when someone views the page, no big processing work...

[*seether*]

It's working now! Thanks!!