Php 如何在codeigniter中设置数据库中的会话用户数据？

我在codeigniter 3中的会话登录有问题。我无法从数据库获取数据以插入会话。我的代码怎么了

我的控制器

function __construct(){
    parent::__construct();      
    $this->load->model('m_login');
}

function index(){
    $this->load->view('v_login');
}

function aksi_login(){
    $username = $this->input->post('username');
    $password = $this->input->post('password');
    $where = array(
        'username' => $username,
        'password' => md5($password)
        );
    $cek = $this->m_login->cek_login("admin",$where)->num_rows();
    if($cek > 0){
        $data_session = array(
            'username' => $cek['username'],
            'nama'     => $cek['nama']
            'status'   => "login"
            );
        $this->session->set_userdata($data_session);
        redirect(base_url("admin"));
    }else{
        echo "Username dan password salah !";
    }
}
}

我的模型

<?php 
class M_login extends CI_Model{ 
function cek_login($table,$where){      
    return $this->db->get_where($table,$where);
    }   
}

像这样试试

function aksi_login(){
    $username = $this->input->post('username');
    $password = $this->input->post('password');
    $where = array(
        'username' => $username,
        'password' => md5($password)
        );
    $result = $this->m_login->cek_login("admin",$where);
    $cek = $this->m_login->cek_login("admin",$where)->num_rows();
    if($cek > 0){
        $cek = $result->row_array();//no your records are in array format having matched row
        $data_session = array(
            'username' => $cek['username'],
            'nama'     => $cek['nama']
            'status'   => "login"
            );
        $this->session->set_userdata($data_session);
        redirect(base_url("admin"));
    }else{
        echo "Username dan password salah !";
    }
}

在codeigniter中，
row\u array（）
以数组格式获取第一个匹配的行。因此您的
函数aksi\u login（）
必须如下所示

function aksi_login(){
    $username = $this->input->post('username');
    $password = $this->input->post('password');
    $where = array(
        'username' => $username,
        'password' => md5($password)
        );
    $result = $this->m_login->cek_login("admin",$where);
    $cek = $this->m_login->cek_login("admin",$where)->num_rows();
    if($cek > 0){
        $cek = $result->row_array();//no your records are in array format having matched row
        $data_session = array(
            'username' => $cek['username'],
            'nama'     => $cek['nama']
            'status'   => "login"
            );
        $this->session->set_userdata($data_session);
        redirect(base_url("admin"));
    }else{
        echo "Username dan password salah !";
    }
}

有关更多信息，请参见此处..
1.m\u登录->cek\u登录

此函数返回一个SQL查询对象

2.SQL查询对象->num_rows（）函数返回一个INT（$cek）

所以$cek是一个整数。所以你不能像数组一样使用（$cek['username']）

因此，请尝试此代码

function aksi_login(){
    $username = $this->input->post('username');
    $password = $this->input->post('password');
    $where = array(
        'username' => $username,
       'password' => md5($password)
    );
   $cek = $this->m_login->cek_login("admin",$where);//$cek is a Query Object
   $rows = $cek->num_rows();//$rows is a INT
   if($rows > 0){
        $cek = $cek->row_array();//now u get an Array
        $data_session = array(
           'username' => $cek['username'],
           'nama'     => $cek['nama']
           'status'   => "login"
           );
        $this->session->set_userdata($data_session);
        redirect(base_url("admin"));
    }else{
        echo "Username dan password salah !";
    }
}

你加载会话库了吗？是的，我加载了$自动加载['libraries']=array（'database'，'session'，'form_validation'）；不工作。。致命错误：调用integeroh上的成员函数row_array（），抱歉，我的坏消息不起作用。致命错误：在/index.php中调用integeran和more…define（'ENVIRONMENT'，'development'）上的成员函数row_array（）。然后你可以看到错误提示。很高兴能帮你解决这个问题。现在每个输入都可以登录。