dongxu7408 2015-06-04 07:53
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session_start()无法正常工作并发出警告,尽管它位于页面顶部

This code was working properly in Xampp but it's not working after I uploaded it on the server

<?php 
ob_start();
session_start();
if(session_status()!=PHP_SESSION_ACTIVE) { session_start();}
if(!isset($_SESSION['username']) || !isset($_SESSION['password']))
{
    header('location:login.php');
}
$connection=mysqli_query('localhost','username','password','dbname')
?>
<!DOCTYPE html>
<html lang="en" xmlns="http://www.w3.org/1999/html">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

The page has loaded fine but it's giving error on top of the page and because it's an admin page it must not open unless the session is set. this is the warning that I am getting right now.

Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home3/index.php:1) in /home3/index.php on line 3

Warning: Cannot modify header information - headers already sent by (output started at /home3/index.php:1) in /home3/index.php on line 7
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3条回答 默认 最新

  • douzangdang2225 2015-06-04 07:57
    关注

    use the below code and make sure that you do not have any space left over in your code before the <?php tag starts.

    <?php  session_start();
    ob_start();
    

    Note that session can be started only before output starts on the page and same rule applies for the header function in php.

    本回答被题主选为最佳回答 , 对您是否有帮助呢?
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