Question

Can anyone help me ?

How can I configure the CI database settings programmatically ? I saw this with other systems like OSCommerce, Joomla, WordPress etc..

The user needs to submit a form with database information.

Answer 1

This is actually a pretty complicated process.

MojoMotor which is based on CI has an installation script which makes the additions to application/config/database.php which means it’s not impossible.

The license agreement for MM prohibits me from posting the actual installation script, but you should be able to create something that works.

Otherwise, imagine something like this:

    // Data from user input
    $db_config['hostname'] = $this->input->post('db_host');
    $db_config['username'] = $this->input->post('db_user');
    $db_config['password'] = $this->input->post('db_password');
    $db_config['database'] = $this->input->post('db_name');
    $db_config['dbdriver'] = $this->db_driver;
    $db_config['dbprefix'] = $this->db_prefix;
    $db_config['pconnect'] = ($this->input->post('pconnect')) ? TRUE : FALSE;
    
    $this->CI =& get_instance();
    $this->CI->load->helper('file');

    $prototype = array(
                        'hostname'  => 'localhost',
                        'username'  => '',
                        'password'  => '',
                        'database'  => '',
                        'dbdriver'  => 'mysql',
                        'dbprefix'  => 'mojo_',
                        'pconnect'  => TRUE,
                        'db_debug'  => FALSE,
                        'cache_on'  => FALSE,
                        'cachedir'  => '',
                        'char_set'  => 'utf8',
                        'dbcollat'  => 'utf8_general_ci'
                    );

    // Now we read the file data as a string
    $config_file = read_file(APPPATH.'config/database'.EXT);

    // Dollar signs seem to create a problem with our preg_replace
    // so we'll temporarily swap them out
    $config_file = str_replace('$', '@s@', $config_file);

    // Cycle through the newconfig array and swap out the data
    if (count($dbconfig) > 0)
    {
        foreach ($dbconfig as $key => $val)
        {
            if ($val === 'y')
            {
                $val = TRUE;
            }
            elseif ($val == 'n')
            {
                $val = FALSE;
            }

            if (is_bool($val))
            {
                $val = ($val == TRUE) ? 'TRUE' : 'FALSE';
            }
            else
            {
                $val = '\''.$val.'\'';
            }

            $val .= ';';

            // Update the value
            $config_file = preg_replace("#(\@s\@db\[(['\"])".$active_group."\\2\]\[(['\"])".$key."\\3\]\s*=\s*).*?;#", "\\1$val", $config_file);
        }
    }

    // Put the dollar signs back
    $config_file = str_replace('@s@', '$', $config_file);

    // Just to make sure we don't have any unwanted whitespace
    $config_file = trim($config_file);

    // Write the file
    $fp = fopen($this->database_path, FOPEN_WRITE_CREATE_DESTRUCTIVE);

    flock($fp, LOCK_EX);
    fwrite($fp, $config_file, strlen($config_file));
    flock($fp, LOCK_UN);
    fclose($fp);

I haven’t tested this, but I’m trying to implement something like similar to one of my own projects.

I hope this could bring you a little closer.