php - Codeigniter 消息 : Call to undefined function random_string()

Question

我遇到了以下错误遇到未捕获的异常

Type: Error

Message: Call to undefined function random_string()

Filename: C:\xampp\htdocs\HerbalCebu\application\controllers\login.php

Line Number: 128

Backtrace:

File: C:\xampp\htdocs\HerbalCebu\index.php Line: 315 Function: require_once,

当我想生成一个随机字符串时，它将作为用户的临时密码放置

这是我的 Controller

function forgot_password()
            {
            $this->form_validation->set_rules('emailpass', 'emailpass', 'trim|required');

            if($this->form_validation->run() == FALSE)
            {

            $this->load->view('Login/modal_forgot');
            $this->load->view('CustTemplate/header');
            $this->load->view('Login/Login');
            $this->load->view('CustTemplate/footer');
            }else{
            $password = ('alpha', 8);
            $data = array('password'=>md5($password));
            $this->db->where('email',$this->input->post('emailpass'));

            $this->db->update('users',$data);
            $this->session->set_flashdata('message','here is your new password: <mark>'.$password.'</mark><br> please login now and change the given password');
            redirect(base_url('login'));
            }
            }

            public function check_email($password)
            {
                $email = $this->input->post('emailpass');

                $result = $this->queries_login->get_email($email);

                if($result)
                {
                    return TRUE;
                }
                else
                {
                    $this->form_validation->set_message('Check_email','The email you entered is not on the database');
                    return FALSE;
                }
            }

和模型

public function get_email($email)
        {
            $this->db->select('*');
            $this->db->from('users');
            $this->db->where('email',$email);
            $this->db->limit(1);

            $query = $this->db->get();

            if($query ->num_rows()==1)
            {
                return $query->result();
            }
            else
            {
                return false;
            }
        }

Answer 1

我并没有真正看到它在您的代码中的任何地方使用(可能在这里:$password = ('alpha', 8); ？)，但是您应该在通过 $this->load->helper('string'); 调用函数之前加载帮助程序或自动加载到 application/config/autoload.php
如果错误仍然存​​在，请确保文件存在于 system/helpers/string_helper.php .

正如有人使用 md5 时不断建议的那样- 你真的不应该使用它(甚至在官方文档中推荐):http://php.net/manual/en/function.md5.php

您可以使用 password_hash功能验证 password_verify . http://php.net/manual/en/function.password-hash.php