What best practices should be followed when using PHP to create arrays for dynamic content display on a website?

When using PHP to create arrays for dynamic content display on a website, it is important to follow best practices to ensure the code is organized, efficient, and secure. One best practice is to use associative arrays to store key-value pairs of data for easier retrieval and manipulation. Another best practice is to properly sanitize and validate input data to prevent security vulnerabilities such as SQL injection attacks. Additionally, using functions like array_push() or [] to add elements to an array can help keep the code clean and readable.

// Example of creating an associative array for dynamic content display
$dynamic_content = array(
    'title' => 'Welcome to our website',
    'description' => 'Explore our products and services',
    'cta_text' => 'Shop now'
);

// Example of sanitizing input data before adding to an array
$user_input = $_POST['user_input'];
$clean_input = filter_var($user_input, FILTER_SANITIZE_STRING);
$dynamic_content['user_input'] = $clean_input;