In CodeIgniter, passing data from controllers to views is a common task when you want to display dynamic content in your web application. Here's how you can pass data from controllers to views:
1. Loading Views with Data:
- After processing a request in a controller method, load the corresponding view using the
load->view()method. - Pass data to the view as an associative array as the second parameter of the
load->view()method.
Example:
public function index() {
// Load model if needed
$this->load->model('example_model');
// Retrieve data from model or other sources
$data['user'] = $this->example_model->get_user_data($user_id);
$data['products'] = $this->example_model->get_products();
// Pass data to view
$this->load->view('example_view', $data);
}
2. Accessing Data in Views:
- In the corresponding view file (
example_view.php), you can access the passed data using PHP variables. - Use PHP syntax to echo or manipulate the data within the HTML markup.
Example:
<!-- example_view.php -->
<html>
<head>
<title>Example View</title>
</head>
<body>
<h1>Welcome, <?php echo $user['username']; ?>!</h1>
<h2>Products</h2>
<ul>
<?php foreach ($products as $product): ?>
<li><?php echo $product['name']; ?> - $<?php echo $product['price']; ?></li>
<?php endforeach; ?>
</ul>
</body>
</html>
3. Using Data in Views:
- Once the data is passed to the view, you can use it to dynamically generate HTML content.
- Use PHP control structures like
foreach,if, andelseto iterate through arrays and conditionally display content.
4. Best Practices:
- Avoid performing complex business logic or database queries directly in views. Use models for data retrieval and manipulation.
- Sanitize and validate data before passing it to views to prevent security vulnerabilities.
- Keep views clean and focused on presentation logic. Minimize PHP logic within views to improve readability and maintainability.
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