PHP Codeigniter Blank White screen after change system/core/common.php

Question

First of all, my web return blank white screen,after add error_reporting(E_ALL); to index.php the error is appear :

A PHP Error was encountered

Severity: Notice

Message: Only variable references should be returned by reference

Filename: core/Common.php

Line Number: 257

then, using this suggestion, i change system/core/common.php file on line 257. But After change it, my web comeback to blank screen.

Please help me to solve this...

FYI, my index.php :

define('ENVIRONMENT', 'production');

if (defined('ENVIRONMENT'))
{
    switch (ENVIRONMENT)
    {
        case 'development':
            error_reporting(E_ALL);
            ini_set('display_errors', 1);
        break;

        case 'testing':
        case 'production':
            error_reporting(E_ALL);

        break;

        default:
            exit('The application environment is not set correctly.');
    }
}

I have tried to change ENVIRONMENT to development, but still face blank screen...

this is because version problem in some case. Actually the error is not happened in that particular file — Adarsh M Pallickal, Dec 28 '15 at 05:29
@AdarshMPallickal is it possible to downgrade php when using XAMPP ? — zukijuki, Dec 28 '15 at 05:31
set display_errors=1 in your php.ini... something else must be happening. — Clay, Dec 28 '15 at 05:54
@Clayton i just change to display_erros=1 or display_errors=On, but no change... — zukijuki, Dec 28 '15 at 06:07
are you echo'ing any values? Is that literally everything in your index.php? maybe it's not displaying anything because you have nothing to display? post more code... — Clay, Dec 28 '15 at 06:09
@Clayton i'm not doing echo and too many codes to display here, however this code on my server run smoothly, only on local computer i face this error.... — zukijuki, Dec 28 '15 at 06:11
is your database username/password configured correctly? if you view the source of the 'blank' screen do you see anything? — Clay, Dec 28 '15 at 06:12
@Clayton database still have same configuration to my server, but it should show any error, right ? — zukijuki, Dec 28 '15 at 06:14
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/99094/discussion-between-clayton-and-user2226388). — Clay, Dec 28 '15 at 06:15

score 1 · Accepted Answer · answered Dec 28 '15 at 07:32

Try this. But instead doing this you should change your ENVIRONMENT Constant as your requirement. If you want to show error change define('ENVIRONMENT', 'production'); to define('ENVIRONMENT', 'development');

switch (ENVIRONMENT)
{
    case 'development':
        error_reporting(-1);
        ini_set('display_errors', 1);
    break;

    case 'testing':
    case 'production':
        error_reporting(-1);
        ini_set('display_errors', 1);
    break;

    default:
        exit('The application environment is not set correctly.');
}

score 0 · Answer 2 · answered Dec 28 '15 at 05:31

0

Try this

Edit filename: core/Common.php, line number: 257

Before

return $_config[0] =& $config; 

After

$_config[0] =& $config;
return $_config[0];

answered Dec 28 '15 at 05:31

Adarsh M Pallickal

813
3
16
37

please check the ENVIRONMENT defined in index.php if it is production or testing change to developement define('ENVIRONMENT', 'development'); – Adarsh M Pallickal Dec 28 '15 at 05:43
please mention that change in question – Adarsh M Pallickal Dec 28 '15 at 05:49

score 0 · Answer 3 · edited May 23 '17 at 11:52

0

I have undergone similar issue and modified the 257th line of system/core/common.php. if it is not mentioned as below change it so-

$_config[0] =& $config;
return $_config[0];

Only variable references should be returned by reference - Codeigniter

Codeigniter displays a blank page instead of error messages

edited May 23 '17 at 11:52

Community

1
1

answered Dec 28 '15 at 05:31

Sanjuktha

1,035
3
13
24

1

Thank you but I have done this change, but comeback to blank screen – zukijuki Dec 28 '15 at 05:33
can you just check whether `$db['default']['db_debug']` set to `TRUE` – Sanjuktha Dec 28 '15 at 05:37
yes, it true : `$db['default']['db_debug'] = TRUE;` – zukijuki Dec 28 '15 at 05:39

score 0 · Answer 4 · answered Dec 28 '15 at 06:28

This is default settings of Codeigniter. Keep it has it is.

if (defined('ENVIRONMENT'))
{
    switch (ENVIRONMENT)
    {
        case 'development':
            error_reporting(E_ALL);
        break;

        case 'testing':
        case 'production':
            error_reporting(0);
        break;

        default:
            exit('The application environment is not set correctly.');
    }
}

Just you have to do is, in define('ENVIRONMENT', 'XYZ'); you can change environment with your purpose.

development - Shows errors of your system and suit for developers
testing - This is for testing purpose
production - This is when site is live/hosted. So no errors will appear in view. Just skip all and run smoothly.

When error_reporting(E_ALL); is there you no need to set ini_set('display_errors', 1);. Bcz its shows the all errors as well.

Hence in production do not set error_reporting(E_ALL);. Bcz production is used to when site is hosted.

Hi, it still not work, i just download fresh package from server then just change index.php parameter, but still face error... — zukijuki, Dec 28 '15 at 10:31
`define('ENVIRONMENT', 'production');` to `define('ENVIRONMENT', 'development');` only change this.... — zukijuki, Dec 28 '15 at 12:29
as i said before in my asking, an error then blank screen, please see my question... — zukijuki, Dec 28 '15 at 22:31

PHP Codeigniter Blank White screen after change system/core/common.php

4 Answers4