How can PHP be used to handle form submissions and dynamically update dropdown menus without relying on JavaScript?

To handle form submissions and dynamically update dropdown menus without relying on JavaScript, you can use PHP to process the form data and generate the updated dropdown options based on the submitted data. This can be achieved by submitting the form to the same PHP script that generates the form, processing the submitted data, and then dynamically generating the updated dropdown menu options based on the processed data. 

<?php
// Process form submission
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Get the submitted form data
    $selectedOption = $_POST["selected_option"];

    // Generate updated dropdown menu options based on the submitted data
    $options = ["Option 1", "Option 2", "Option 3"];
    foreach ($options as $option) {
        echo "<option value='$option'";
        if ($option == $selectedOption) {
            echo " selected";
        }
        echo ">$option</option>";
    }
}
?>

Keywords

PHP form submissions dropdown menus dynamic update server-side.

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