How can PHP GET parameters be used effectively in conjunction with autocomplete scripts?

When using autocomplete scripts in PHP, GET parameters can be used effectively to pass data from the client-side to the server-side script for processing. By including the search query in the GET parameters of the AJAX request, the server-side script can dynamically generate autocomplete suggestions based on the user input. This allows for a more responsive and customized autocomplete feature.

// HTML form with input field for autocomplete
<form>
    <input type="text" id="search" name="search" onkeyup="autocomplete()">
</form>

// AJAX request to fetch autocomplete suggestions based on search query
function autocomplete() {
    var searchQuery = document.getElementById('search').value;
    var xhr = new XMLHttpRequest();
    xhr.open('GET', 'autocomplete.php?search=' + searchQuery, true);
    xhr.onreadystatechange = function() {
        if (xhr.readyState == 4 && xhr.status == 200) {
            // Process autocomplete suggestions returned by server
        }
    };
    xhr.send();
}

// autocomplete.php - server-side script to generate autocomplete suggestions
$searchQuery = $_GET['search'];
// Query database or other data source to retrieve autocomplete suggestions based on $searchQuery
// Return JSON response with autocomplete suggestions