How can PHP and JavaScript work together to create dynamic select boxes based on user input?

To create dynamic select boxes based on user input, PHP can be used to fetch data from a database and generate the initial select box options. JavaScript can then be used to listen for user input, make an AJAX request to the server to fetch additional data based on the user's selection, and update the select box accordingly. 

<?php
// PHP code to fetch initial data from database and generate select box
$options = array("Option 1", "Option 2", "Option 3");

echo "<select id='dynamicSelect'>";
foreach ($options as $option) {
    echo "<option value='$option'>$option</option>";
}
echo "</select>";
?>

Keywords

PHP JavaScript dynamic select boxes user input integration

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