Search form in CodeIgniter - php

Question

I am having a problem while creating a search form in CodeIgniter - it's showing errors like:
A PHP Error was encountered
Severity: Notice
Message: Undefined property: Login::$membership_model
Filename: controllers/login.php
Line Number: 12
Backtrace:
File: C:\xampp\htdocs\Project5_1\CodeIgniter\application\controllers\login.php
Line: 12
Function: _error_handler
File: C:\xampp\htdocs\Project5_1\CodeIgniter\index.php
Line: 315
Function: require_once
Fatal error: Call to a member function getSearchBook() on null in C:\xampp\htdocs\Project5_1\CodeIgniter\application\controllers\login.php on line 12
A PHP Error was encountered
Severity: Error
Message: Call to a member function getSearchBook() on null
Filename: controllers/login.php
Line Number: 12
Backtrace:
My Controller Page is:
<?php
class Login extends CI_Controller{
function search(){
$searchBook = $this->input->post('searchBook');
$data = $this->membership_model->getSearchBook($seachBook);
$this->load->view('main_content',$data);
}
?>
My Model page is:
class Membership_model extends CI_Model{
function getSearchBook($searchBook) {
$this->db->select('*');
$this->db->from('book');
$this->db->like('author',$searchBook);
return $query->result();
}
}
My main_content.php is:
<?php
echo form_open('login/search');
echo form_input('searchBook','Search Book', 'id="searchBook"');
echo form_submit('submit', 'Search');
echo form_close();
?>
<table><th>Title</th></table>
<div>
<?php
// List up all results.
foreach ($results as $val)
{
echo $val['title'];
}
?>
</div>
</body>

Answer 1

It's been a long time since I used CodeIgniter, but from what I remember, you're not loading the model in your Login class constructor. That's why you're getting these two parts of the error:
Message: Undefined property: Login::$membership_model
Message: Call to a member function getSearchBook() on null
Neither the property or the function exist in the Login class if you haven't loaded the membership_model model.
Off the top of my head, I think it needs to be something like this in your Login controller:
<?php
class Login extends CI_Controller{
function __construct()
{
parent::__construct();
$this->load->model('membership_model');
}
function search(){
$searchBook = $this->input->post('searchBook');
$data = $this->membership_model->getSearchBook($seachBook);
$this->load->view('main_content',$data);
}
?>