How can PHP be integrated with HTML forms to create dynamic dropdown menus based on user input?

To create dynamic dropdown menus based on user input in HTML forms using PHP, you can use AJAX to send the user input to a PHP script that generates the dropdown options dynamically. The PHP script will fetch the necessary data based on the user input and return it to the HTML page, which can then update the dropdown menu accordingly. 

<?php
// PHP script to generate dynamic dropdown options based on user input
if(isset($_POST['user_input'])) {
    $user_input = $_POST['user_input'];

    // Perform database query or any other data retrieval method based on user input
    $options = array("Option 1", "Option 2", "Option 3");

    // Generate dropdown options based on retrieved data
    foreach($options as $option) {
        echo "<option value='$option'>$option</option>";
    }
}
?>

Keywords

PHP HTML forms dynamic dropdown menus user input integration

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