PHP / Codeigniter - set environment when running in CLI mode

php_argv_environment.php

<?php

# in public_html/index.php

/*
 * Where your CodeIgniter ENVIRONMENT is normally defined by the server environment
 * variables, and assuming your database settings are automatically set based on 
 * that environment, this causes a problem when running the application through
 * PHP on the command line e.g. in order to run CodeIgniter Migrations
 *
 * This can be solved by setting the environment from the $argv array.
 * The following example for a testing environment would be called on the command 
 * line like this:


$ cd /path/to/public_html/
$ php index.php migrate testing

 */


if (PHP_SAPI === 'cli'){
    if($argv[1] != 'migrate' || !isset($argv[2]))
        exit("Access denied\n");
    else
        define('ENVIRONMENT', $argv[2]);
} else {
    define('ENVIRONMENT', getenv('APPLICATION_ENV'));
}


# continue with index.php bootstrap



/*
 * Note that in your migrate controller, you can restrict access to command line only as follows:
 * 
 */

if(!$this->input->is_cli_request())
    show_error('Access denied',403);