php - codeigniter 闪存数据未按预期工作

Question

我已经在 Controller 中设置了闪存数据

public function customer() {
    $data['title'] = 'Black List Management';

    if ($this->input->post('single_black')) {
        //echo 'here';return;
        $wallet = trim($this->input->post('single_wallet', TRUE));
        $reason = trim($this->input->post('reason', TRUE));
        $match = preg_match('/^01[15-9]\d{8}$/', $wallet);

       //if not valid mobile
        if ($match == 0 || !$match) {

            $this->session->set_flashdata('message', 'The wallet is not valid Mobile no.');
            redirect('blacklist/index');
        }
        $is_blacklisted = $this->db->where('wallet', $wallet)->where('is_blacklisted', 1)->get('customers')->num_rows();

       //if already blacklisted
        if ($is_blacklisted > 0) {

            $this->session->set_flashdata('message', 'This wallet is already in blacklist');
            redirect('blacklist/index');
        }

        $this->form_validation->set_rules('reason', 'Reason', 'required');
        if ($this->form_validation->run() == FALSE) {// if invalid form
            $this->nuts_lib->view_loader('user', 'blacklist', $data);
            return;
        } else {
            $user_id = (int) $this->session->user_id;

            $query = $this->db->where('wallet', $wallet)->where('is_blacklisted', 0)->get('customers');
            $result = $query->result_array();
            if (count($result) > 0) {// if exist uppdate
                $customer_id = (int) $result[0]['id'];
                $blacklist = array(
                    'is_blacklisted' => 1,
                    'blacklist_meta' => date('Y-m-d H:i:s') . '|' . $user_id . '|' . $reason
                );
                $this->db->where('id', $customer_id)->update('customers', $blacklist);
            } else {// insert
                $new_blacklist = array(
                    'wallet' => $wallet,
                    'is_blacklisted' => 1,
                    'blacklist_meta' => date('Y-m-d H:i:s') . '|' . $user_id . '|' . $reason
                );
                $this->db->insert('customers', $new_blacklist);
            }
            $this->session->set_flashdata('message', 'Successfully Blacklisted');
            redirect('blacklist');
        }
    }
}

错误时从这个customer方法重定向到下面的索引方法

public function index() {
    $data['title'] = 'Black List Management';

    $this->nuts_lib->view_loader('user', 'blacklist', $data);
}

在我的 View 文件中(user/blacklist.php)

$message = $this->session->flashdata('message');
if (isset($message)) {
     echo '<div class="alert alert-info">' . $message . '</div>';
}

因此，当出现 $error 时，它可以很好地显示 flashdata，但问题 是当下次(提交表单后)出现相同的错误时，flashdata 不再显示。

到目前为止我尝试过的是 CodeIgniter flashdata not working after redirect

我需要在每次收到 $error 时显示 flashdata 消息

Answer 1

千辛万苦终于成功了。您所要做的就是使用 $this->session->keep_flashdata('message') 和 $this->session->unset_userdata('message')

这是我的解决方案(查看文件)

    <?php
    $message = $this->session->flashdata('message');
    if (isset($message)) {
        echo '<div class="alert alert-info">' . $message . '</div>';
         $this->session->unset_userdata('message');
    }

    ?>

之后在我的 Controller 中 construct 函数

 public function __construct() {
    parent::__construct();
    .....
    $this->session->keep_flashdata('message');
}

它在每个错误中都有效。仍然有一些愚蠢的问题，但到目前为止工作得很好