通过CLI访问控制器时清空$ this对象

Question

I'm making a Cron job in CodeIgniter and I need access to my models in order to perform it's tasks. Here's my controller code.

<?php
/**
* 
*/
class Cron extends CI_Controller
{
    function __construct() {
        if ( PHP_SAPI !== 'cli' ) exit('No web access allowed');
    }

    public function send_mail() {
        $this->load->model("mail_model");
        foreach ($this->mail_model->cron_job() as $mail) {
            echo $mail->id;
        }
    }
}

If I call the send_mail function using CLI using this command:

php /home/path/to/project/index.php cron send_mail

It returns this error:

Message:  Undefined property: Cron::$load
PHP Fatal error:  Call to a member function model() on null in /home/path/to/project/application/controllers/cron.php on line 12

If I var_dump($this) it returns an empty object so I'm confused because it's extending CI_Controller. Any ideas?

Answer 1

Error says, what empty is $this->load, not $this. Check, how $this->load initialised.

Edit your constructor:

function __construct() {
    if ( PHP_SAPI !== 'cli' ) exit('No web access allowed');
    parent::__construct();
}