php codeigniter 中的验证码显示致命错误

captcha in php codeigniter showing fatal error

我是 codeigniter 的新手,我使用在线教程在 codeigniter 中为我的登录表单创建了一个验证码。加载登录页面时出现以下错误:

> 致命错误:调用未定义的函数 base_url() in

    $config = array(
        'img_path'      => 'captcha_images/',
        'img_url'       => base_url().'captcha_images/',
        'img_width'     => '150',
        'img_height'    => 50,
        'word_length'   => 8,
        'font_size'     => 16
    );
    $captcha = create_captcha($config);


i dont have any folder named 'captcha_images', all i have is a controller for captcha,config and the view in login. As am new to this, is it because i dont have a folder or i didnt call any library? please help me with this. thanks in advance

前往 application/config/autoload.php 将这一行写在下面(您会在第 90 行找到 codeigniter 不错的文档) $autoload['helper'] = array('url');

这将自动加载 url 助手。 base_url() function is defined in url helper

您可以为特定控制器手动加载它

写这一行 $this->load->helper('url'); 在控制器构造函数中或

Controller action function

有关 base_url click

的更多信息

Create CAPTCHA in codeigniter