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What are the best practices for passing filter parameters between PHP pages while maintaining user selections?

When passing filter parameters between PHP pages while maintaining user selections, it is best to use sessions to store the selected values. This way, the selections can be retained as the user navigates through different pages. By storing the filter parameters in session variables, they can be easily accessed and applied to queries or displayed on subsequent pages.

php 
// Start or resume a session
session_start();

// Store filter parameters in session variables
$_SESSION['selected_filter'] = $_POST['filter_value'];

// Retrieve filter parameters from session variables
$filter_value = $_SESSION['selected_filter'];

// Use the filter parameters in your queries or display on the page
echo "Selected filter: " . $filter_value;

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