called.in wrapper for Codeigniter

called.in wrapper for Codeigniter

<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Calledin{
    
    private $ci;
    
    private $messages = array(
     0=>'Success',
     1=>'invalid api_key',
     2=>'no call credits',
     3=>'the phone_number is on the DoNotCall list',
     4=>'badly formed request. make sure all parameters match the above descriptions',
     5=>'api_key is currently disabled',
     6=>'flood protection for phone_number. please wait 1 minute and try request again',
     7=>'phone_number area code is not supported at this time',
     8=>'country_code is not supported',
    );

    
public function __construct()
{

$this->ci = & get_instance();
$this->ci->load->config('calledin');
$this->calledin_config = array(
'api_url' => config_item('api_url'),
'api_key' => config_item('api_key'),
);

}

function verify($phone, $country_code =1, $code=0)
{

$retval = array('opstat'=>1, 'msg_number'=>999 ,'msg'=>'Internal error');

if (!$code)
{
return $retval; //internal error. calledin return 0 = success
}

          $api_url = $this->calledin_config['api_url'];
          $api_key = $this->calledin_config['api_key'];
          
          $phone = $this->_clean_phone_number($phone);
          $code = $this->_clean_code($code);
          
          if ($api_url && $api_key && $phone && $code)
          {
           $query_array = array(
           'api_key'=>$api_key,
           'phone_number'=>$phone,
           'country_code'=>$country_code,
           'code'=>$code,
          
           );
           $query = http_build_query($query_array);
          
           $url = $api_url.'?'.$query;
               
           //issue the API call to Called.in
                $return_code = file_get_contents($url);
               
                if($return_code == 0)
                {
                $retval['opstat'] = 0;
                }
               
                $retval['msg_number'] = $return_code;
                $retval['msg'] = $this->messages[$retval['msg_number']];
                return $retval;
          }
          return $retval;

}

function _clean_phone_number($phone)
{
$phone = preg_replace('/\D/', '', $phone);
if (strlen($phone) == 10)
{
return $phone;
}
return false;
}

function _clean_code($code)
{
$code = preg_replace('/\D/', '', $code);
if (strlen($code) > 0 && strlen($code) < 7)
{
return $code;
}
return false;
}

}