How can PHP be used to maintain filter settings when navigating back to a list from a detail page?

When navigating back to a list from a detail page, PHP can maintain filter settings by storing the filter criteria in session variables. This way, when the user returns to the list page, the filter settings can be retrieved from the session and applied to the list query to display the filtered results. 

// Start the session
session_start();

// Check if filter criteria is submitted
if(isset($_POST['filter_criteria'])){
    // Store the filter criteria in session variables
    $_SESSION['filter_criteria'] = $_POST['filter_criteria'];
}

// Retrieve filter criteria from session
$filter_criteria = isset($_SESSION['filter_criteria']) ? $_SESSION['filter_criteria'] : '';

// Use the filter criteria in your list query
$query = "SELECT * FROM your_table WHERE column = '$filter_criteria'";
// Execute the query and display the results

Keywords

PHP session variables form submission data persistence navigation tracking

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