Question

我正在尝试在php codeigniter中建立一个项目。但是我一直坚持从数据库中获取数据。

我正在使用mysql，codeigniter-3.1.10和php-7.0.33。

数据库配置文件：

    'dsn'   => '',
    'hostname' => 'localhost',
    'username' => 'root',
    'password' => '221b',
    'database' => 'car',
    'dbdriver' => 'mysqli',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
);

我的模特是

if (defined('BASEPATH') OR exit ('No direct script access allowed'));
    class Homepage_model extends CI_Model{
        public $result;
        public $rs;

        public function __construct(){
            parent::__construct();
            $this->load->database();

        }

        public function get_data($slug = FALSE){
            if ($slug === FALSE) {
                $query = $this->db->get('cars');
                return $query->result_array();
            }

            $query = $this->db->get_where('cars', array('status' => "Available"));
            return $query->row_array();
        }
    }

在模型文件中，当数据库字段“状态”的值为“可用”时，我想从桌车中获取所有数据。控制器文件：

defined('BASEPATH') OR exit('No direct script access allowed');

class Homepage extends CI_Controller{
    public function __construct(){
        parent::__construct();
    }
    public function index(){
        $this->load->model('Homepage_model');
        $rs = $this->Homepage_model->get_data();
        $this->load->view('homepage_view', $rs);

    }
}

我要显示数据的视图部分是：

                foreach($rs as $rws){
                    //echo $rws['car_id'];

            ?>
                <li>
                    <?php echo $rws['car_id'];?>
                    <a href="book_car.php?id=<?php echo $rws['car_id'] ?>">
                        <img class="thumb" src="cars/<?php echo $rws['image'];?>" width="300" height="200">
                    </a>
                    <span class="price"><?php echo 'Kshs.'.$rws['hire_cost'];?></span>
                    <div class="property_details">
                        <h1>
                            <a href="book_car.php?id=<?php echo $rws['car_id'] ?>"><?php echo 'Car Make>'.$rws['car_type'];?></a>
                        </h1>
                        <h2>Car Name/Model: <span class="property_size"><?php echo $rws['car_name'];?></span></h2>
                    </div>
                </li>
            <?php
                }
            ?>

我已经做到了。但是当我浏览网页时，这些数据都没有显示。请帮助解决此问题。

Answer 1

在您的控制器功能中传递$data变量，例如$this->load->view('homepage_view', $data);

public function index(){
    $this->load->model('Homepage_model');
    $result = $this->Homepage_model->get_data();
    $data['rs'] =  $result; 
    $this->load->view('homepage_view', $data);
}

Answer 2

查询中的内容已更改

$query = $this->db->get_where('cars', array('status' => "Available"))->result_array();
return $query;

Answer 3

在模型中

public function get_data($slug = FALSE){
    if ($slug === FALSE) {
        $query = $this->db->get('cars');
        return $query->result_array();
    }

    $query = $this->db->get_where('cars', array('status' => "Available"));
    $result = $query->result_array(); # change
    return $result; # change
}

在控制器中

public function index(){
    $this->load->model('Homepage_model');
    $result = $this->Homepage_model->get_data();
    $data['rs'] =  $result; # or  $data['rs']  = $this->Homepage_model->get_data(); assign directly 
    $this->load->view('homepage_view', $rs);
}

在视图中 foreach($rs as $rws){将有效

确保表格不为空。

Answer 4

只需将$row_array()更改为$result_array()

return $this->db->get_where('cars', array('status' => "Available"))->result_array();

row_array()仅用于获取一个$result_array()关联数组形式的所有记录

详细了解row array和result array

需要帮助来从PHP Codeigntier中的数据库中获取数据

4 个答案: