CodeIgniter - Blank page on database autoload

Question

I encouter a problem since this morning, after I migrated my website from my local machine to the server.

To replace the context, I developed a website with the framework CodeIgniter, and everything before the migration was working fine.

After a long research, it seems that when i put this:

$autoload['libraries'] = array('database');

I have a blank page on my website, without any php/ci errors in the logs.

And if I let this:

$autoload['libraries'] = array();

The website is working correctly (well, I can't log in but I don't have a blank page).

I added the mysql.so in the php.ini file, but it didn't help me neither.

Does someone already encountered this problem? How can you solved it please?

Thanks !

B

Answer 1

in application/config/database.php check that

$db['default']['dbdriver'] = 'mysql';

is set to

$db['default']['dbdriver'] = 'mysqli';

Answer 2

I had a similar problem with blank pages seemingly associated with loading the database, be it via autoload or calling $this->load->database(); in the model constructor. I ended up having to modify my 'php.ini' file by commenting out extension=php_pdo_mysql.dll and uncommenting extension=php_mysql.dll (ie turning PDO back off). I am running Windows 8.1, Apache 2.2, and PHP 5.3.27.

This answer is similar to another, but I couldn't add a comment for clarification since I just signed up. It took me a couple of hours and a lot of Googling to resolve, so hopefully this helps somebody.

Answer 3

Are you sure your db connection credentials are correct? If you switchd servers this seems like it might be the issue.

Additionally, CodeIgniter sets error_reporting(0) for production environments --- hence the blank page. Check your logs dir (is it writeable by the webserver process..?) for any other info.

Answer 4

I have just had this error, after debugging the MYSQL driver I figure out the problem.

The problem was that on the database config file I was using MYSQL as a driver when on the server it has installed MYSQLI, just change it on the config file and you're done.

Hope this helps someone.

Answer 5

Please restart your webserver and try again.

create a new info.php file with phpinfo();

 <?php phpinfo(); ?>

see if the mysql extension is loading if its loading

try to do a chmod 0777 to your directoy

Answer 6

This happens when you don't have mysql module for php installed. In windows, I believe this comes with the php installer. If you are on linux, for example on Fedora, this is how you install it:

sudo yum -y install php-mysql

Restart the webserver after the installation. Assuming you are using apache httpd:

sudo service httpd restart

Now you should see the pages again (assuming you have correct settings in conf/database.php).

Answer 7

For me, having the same issue using Z-WAMP, had to uncomment "extension=php_mysql.dll" from the php.ini. Also assigned "mysql.default_port = 3306" and "mysql.default_host = localhost". Hope it helps someone out there

Answer 8

For those using linux (esp. ubuntu) and are still getting the blank page, do the following:

1. sudo apt-get install php5 libapache2-mod-php5 php5-mysql php5-cli mysql-server
2. sudo service apache2 restart
3. $autoload['libraries'] = array('database');

Answer 9

Installing php5-pgsql fixed it for me (on Ubuntu)

Answer 10

It sounds like your database is not configured properly and your PHP installation is blocking the errors.

Take a look at your log files or try putting

ini_set('display_errors',1);
error_reporting(E_ALL|E_STRICT);

in your index.php and see what you get