Weblabor

private function get_file_size($url)
{
    $ch = curl_init($url);

    curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($ch, CURLOPT_HEADER, TRUE);
    curl_setopt($ch, CURLOPT_NOBODY, TRUE);

    $data = curl_exec($ch);
    $size = curl_getinfo($ch, CURLINFO_CONTENT_LENGTH_DOWNLOAD);

    curl_close($ch);

    return $size;
}

public function size_check()
{
    if(!$this->input->is_cli_request()) return;

    $this->load->model('world_model');
    $this->load->model('confederacy_model');
    $this->load->model('attack_model');

    $url = $this->world_model->get_worlds(array(
        'key' => 'world_id',
        'value' => 'world_url'));

    $world = $this->confederacy_model->get_confederacies(array(
        'key' => 'confederacy_id',
        'value' => 'confederacy_world_id'));

    $attacks = $this->attack_model->admin_get_attacks(array(
        'attack_hero' => 0,
        'attack_time_min' => now(),
        'key' => 'attack_id'));

    foreach($attacks as $attack_id => $attack)
    {
        $url_ = $url[$world[$attack->attack_confederacy_id]];

        $img_old = $this->get_file_size(base_url().'attack_heros/hero_'.$attack_id.'.jpg');
        $img_new = $this->get_file_size('http://'.$url_.'/hero_body.php?uid='.$attack->attack_from_uid.'&'.now());

        if( $img_old != $img_new )
        {
             $this->attack_model->update_attack(array(
                 'attack_id' => $attack_id,
                 'attack_confederacy_id' => $attack->attack_confederacy_id,
                 'attack_hero' => 1));
        }

    }
}

$img_old = $this->get_file_size(base_url().'attack_heros/hero_'.$attack_id.'.jpg');

$img_old = strlen(file_get_contents(base_url().'attack_heros/hero_'.$attack->attack_id.'.jpg'));