Question

I am trying to get the new PDO driver running in Code Igniter 2.1.1 in (to start with) the local (Mac OS 10.7) copy of my app.
I initially coded it using Active Record for all db operations, and I am now thinking I want to use PDO prepared statements in my model files, going forward.

I modified ‘application/config/database.php’ like so:
(note a couple minor embedded questions)

[snip]

$active_group = 'local_dev';

$active_record = TRUE;//<---BTW, will this need to stay TRUE to make CI sessions work?  For better security, don't we want db-based CI sessions to use PDO too?
//http://codeigniter.com/user_guide/database/configuration.html:
    //Note: that some CodeIgniter classes such as Sessions require Active Records be enabled to access certain functionality.

//this is the config setting that I am guessing (?) is my main problem: 

$db['local_dev']['hostname'] = 'localhost:/tmp/mysql.sock';

// 1.) if $db['local_dev']['dbdriver']='mysql', then here ^^^ 'localhost:/tmp/mysql.sock' works, 2.) but if $db['local_dev']['dbdriver']='pdo', then it fails with error msg. shown below.

$db['local_dev']['username'] = 'root';
$db['local_dev']['password'] = '';
$db['local_dev']['database'] = 'mydbname';
$db['local_dev']['dbdriver'] = 'pdo';
$db['local_dev']['dbprefix'] = '';
$db['local_dev']['pconnect'] = TRUE;
$db['local_dev']['db_debug'] = TRUE;//TRUE
$db['local_dev']['cache_on'] = FALSE;
$db['local_dev']['cachedir'] = '';
$db['local_dev']['char_set'] = 'utf8';
$db['local_dev']['dbcollat'] = 'utf8_general_ci';
$db['local_dev']['swap_pre'] = '';
$db['local_dev']['autoinit'] = TRUE;
$db['local_dev']['stricton'] = FALSE;
[snip]

With the above config., as soon as I load a controller, I get this error message:

Fatal error: Uncaught exception 'PDOException' with message 'could not find driver' in 
/Library/WebServer/Documents/system/database/drivers/pdo/pdo_driver.php:114 Stack trace: #0 
/Library/WebServer/Documents/system/database/drivers/pdo/pdo_driver.php(114): PDO->__construct('localhost:/tmp/...', 'root', '', Array) #1 /Library/WebServer/Documents/system/database/DB_driver.php(115): CI_DB_pdo_driver->db_pconnect() #2 
/Library/WebServer/Documents/system/database/DB.php(148): CI_DB_driver->initialize() #3 
/Library/WebServer/Documents/system/core/Loader.php(346): DB('', NULL) #4 
/Library/WebServer/Documents/system/core/Loader.php(1171): CI_Loader->database() #5 
/Library/WebServer/Documents/system/core/Loader.php(152): CI_Loader->_ci_autoloader() #6 
/Library/WebServer/Documents/system/core/Con in 
/Library/WebServer/Documents/system/database/drivers/pdo/pdo_driver.php on line 114

I tried swapping out the ‘pdo_driver.php’ file from the one on github, as per this:
http://codeigniter.com/forums/viewthread/206124/
…but that just generates other errors, not to mention is disturbing to a newbie who does not want to touch the system files if at all possible.

This thread also seems to imply the need to be hacking the ‘pdo_driver.php’ system file:
CodeIgniter PDO database driver not working
It seems odd to me, though, that (someone thought that) a hack to a system file is needed to make PDO work in CI v.2.1.1, huh?

Thanks for any suggestions I can try.

Answer 1

thanks to the noob thread http://codeigniter.com/forums/viewthread/180277/ (InsiteFX’s answer)..

I figured out the below seems to work (need to test more to be 100%… but at least the error messages are gone:

$db['local_dev']['hostname'] = 'mysql:host=127.0.0.1';