How can PHP be utilized to retain user selections across page changes?

To retain user selections across page changes in PHP, you can use sessions to store the selected values and retrieve them on subsequent pages. By storing the user selections in session variables, you can maintain the data throughout the user's session on the website. 

// Start the session
session_start();

// Check if a selection has been made
if(isset($_POST['selection'])){
    $_SESSION['user_selection'] = $_POST['selection'];
}

// Retrieve the user selection on subsequent pages
$user_selection = isset($_SESSION['user_selection']) ? $_SESSION['user_selection'] : '';

Keywords

PHP session variables form submission cookies data persistence

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