How can dynamic dropdown fields be implemented in PHP for selecting options based on user input?

Dynamic dropdown fields can be implemented in PHP by using AJAX to fetch data from the server based on user input. When the user selects an option in the first dropdown, an AJAX request is sent to the server to fetch the corresponding options for the second dropdown. This allows for a seamless and interactive user experience without the need to reload the page. 

<?php
if(isset($_POST['selected_option'])) {
    $selected_option = $_POST['selected_option'];
    
    // Perform database query to fetch options based on selected_option
    
    $options = array("Option 1", "Option 2", "Option 3"); // Example options
    
    foreach($options as $option) {
        echo "<option value='$option'>$option</option>";
    }
}
?>

Keywords

PHP dynamic dropdown user input options implementation

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