PHP-CODEIGNITER如何在会话中获取数据

Question

I want echo my list of trip, when I try print_r the value can show but when I echo the result always

Message: Undefined variable: adventure

Filename: views/profile.php

Line Number: 121

Backtrace:

Severity: Warning

Message: Invalid argument supplied for foreach()

Filename: views/profile.php

Line Number: 121

this is my controller :

 public function getListTrip(){         
    $this->load->model('userModel');        
    $data['adventure'] = $this->userModel->getTrip()->result_array();
    //echo ($data);
    $this->load->view('profile', $data);        
 }

and this is my model :

function getTrip(){
    $userId = $this->session->userdata('user_id');    
    return $this->db->get_where('adventure',['user_id' => $userId]);
}

this is my view

                        <table>
                           <?php
                            foreach ($adventure as $b){
                                echo "<tr>
                                <td>$b->name</td>
                                <td>$b->place</td>
                                <td>$b->category</td>

                                </tr>";
                            }

                        ?>
                        </table>

so how should I edit my code to make the value show in my page whit echo or foreach not in print_r... thanks a lot

Answer 1

echo is used to output one or more strings, since your $data is an array you see the error, you need to pass data to view and iterate it in the view itself, like:

public function getListTrip(){
    $this->load->model('userModel');
    $data['adventure'] = $this->userModel->getTrip()->result_array();
    //pass data to your view
    $this->load->view('yourviewname', $data);
}

For more information check Codeigniter Views

Update

Check if your array is not empty before trying to iterate thru it, like in your view::

<?php
if( !empty($adventure) ) {
    foreach($adventure as $b):
?>
        <tr>
            <td><?php echo $b['name']; ?></td>
            <td><?php echo $b['place']; ?></td>
            <td><?php echo $b['category']; ?></td>
        </tr>
<?php
    endforeach;
}
?>

Answer 2

Change your model

function getTrip(){
    $userId = $this->session->userdata('user_id');    
    $query= $this->db->get_where('adventure',['user_id' => $userId]);
    return $query->result();
}

Also chnage in your controller

$data['adventure'] = $this->userModel->getTrip()->result_array();

To

$data['adventure'] = $this->userModel->getTrip();

Answer 3

You cannot echo the content of an Array.

So whenever you want to view the Content of an array use print_r($arrayName);

And When you just want to print any variable just use echo $variableName;

Answer 4

I don't see any issue with your code. If you're not using autoloader to load the session library that might be your issue:

$this->load->library('session');

You can check the documentation Codeigniter sessions