I am getting php session error on my live developed using codeigniter
A PHP Error was encountered
Severity: Warning
Message: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at /home/userts4m/public_html/development/relatioweb/admin/index.php:1)
Filename: Session/Session.php
Line Number: 140
Backtrace:
File: /home/userts4m/public_html/development/relatioweb/application/admin/controllers/User.php
Line: 9
Function: __construct
File: /home/userts4m/public_html/development/relatioweb/admin/index.php
Line: 293
Function: require_once
Working at localhost fine. But when i uploded at server we are facing this issue.
What should i do ...
As per @kunal and @dale suggestion there was a space in /home/userts4m/public_html/development/relatioweb/admin/index.php
This usually means that somewhere you've already got a session_start() and a second one will throw this error. Remove the redundant one.
Try using @session_start(); It will bypass the error and session will be start. Please note @session_start() is your first line of the code. Do not execute or echo anything before it.
There are two solutions to fix this issue.
Some times this error occurred due to the wrong configuration of the framework, go to the folder applications/config and open up the config.php write this in the starting of file like this
<?php
if (!defined('BASEPATH')) exit('No direct script access allowed');
ob_start();
/* Remaining Part Of your file
.........................................
*/
Another solution is to write ob_start() in the constructor of the class like this:
<?php
if (!defined('BASEPATH')) exit('No direct script access allowed');
class Your_Controller extends CI_Controller {
public function __construct() {
parent::__construct();
ob_start();
}
}
the problem is well explained here How to fix "Headers already sent" error in PHP
In order to solve this I needed to implement the concept of output-buffering (Output buffering is a mechanism in which instead of sending a response immediately to browser we buffer it somewhere so that we can send it at once when whole content is ready ). So as the error indicate the problem occurs in index.php
what I did I inserted
ob_start();
at the beginning of index.php
In this file may have blank space before start PHP tag.
Check the controller file, if there are spaces before the php tag remove it.
check your files for extra spaces or enter, in my case, I have an extra enter in application/config/autoload.php before php tag (Iam using codeigniter)
ob_start ([ callable $output_callback = NULL [, int $chunk_size = 0 [, int $flags =
PHP_OUTPUT_HANDLER_STDFLAGS ]]] ) : bool
This function will turn output buffering on. While output buffering is active no output is sent from the script (other than headers), instead the output is stored in an internal buffer.
The contents of this internal buffer may be copied into a string variable using ob_get_contents(). To output what is stored in the internal buffer, use ob_end_flush(). Alternatively, ob_end_clean() will silently discard the buffer contents.