Question

I have 2 pages one is index.php other is classes.php

should not this work classes.php:

<?php
  ob_start();
  session_start();

?>

index.php:

<?php
  include "classes.php";
  error_reporting(E_ALL);
  echo "Loaded";
?>
Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at /public_html/index.php:1) in /public_html/includes/classes.php on line 2

Answer 1

Make sure you do not send anything before anything regarding session is executed.

That means:

• remove everything before <?php,
• remove trailing ?> tags (they are not required and often harmful),

The problem you experienced is caused by something that is before “<?php” within index.php file (it may be a space, tab, end of line or anything else you did not show us), but if you follow the above rules, you should have this issue a lot less often during further development of your application.