How can session variables be properly overwritten in PHP to update search terms?

Session variables can be properly overwritten in PHP by first checking if the session variable exists, and if it does, updating its value with the new search term. This ensures that the session variable is always up-to-date with the latest search term entered by the user. 

// Start the session
session_start();

// Check if the search term is set in the session
if(isset($_SESSION['search_term'])){
    // Update the search term with the new value
    $_SESSION['search_term'] = $_POST['search_input'];
} else {
    // If search term is not set, initialize it with the new value
    $_SESSION['search_term'] = $_POST['search_input'];
}

Keywords

PHP session variables overwrite update search terms

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