How to configure Codeigniter to report all errors?

It depends on your version of CI. For < 2.x edit the top level index.php and adjust the error_reporting function to use E_ALL"

error_reporting(E_ALL);

For >= 2.x edit the top level index.php and make sure ENVIRONMENT is set as:

define('ENVIRONMENT', 'development');

which sets the error_reporting to E_ALL.

Create a .htaccess file in your webroot with the following content

php_flag display_startup_errors onphp_flag display_errors onphp_flag html_errors onphp_flag log_errors onphp_flag ignore_repeated_errors offphp_flag ignore_repeated_source offphp_flag report_memleaks onphp_flag track_errors onphp_value error_reporting -1php_value log_errors_max_len 0

Hopefully that should enable your logs.
Make sure to set the values to off and reporting to 0 on your production server :)

Following environment settings would gonna force PHP to display errors as they occur:

• APPLICATION ENVIRONMENTdefine('ENVIRONMENT', 'development');/*

• ERROR REPORTING

  if (defined('ENVIRONMENT')){ switch (ENVIRONMENT) { case 'development': // Report all errors error_reporting(E_ALL);

          // Display errors in output        ini_set('display_errors', 1);        break;    case 'testing':    case 'production':        // Report all errors except E_NOTICE        // This is the default value set in php.ini        error_reporting(E_ALL ^ E_NOTICE);        // Don't display errors (they can still be logged)        ini_set('display_errors', 0);    break;    default:        exit('The application environment is not set correctly.');}

  }