Make fields Readonly based on an input or selected logic. For this instance selecting status "Shipped" will make Requireddate and Shippeddate readonly

<?php
    // Get an instance of the Xcrud class
	$xcrud = Xcrud::get_instance();	

    // Set the table to work with
	$xcrud->table("orders");

    // Define which columns to display in the table
    $xcrud->columns("orderDate,status,requiredDate,shippedDate,comments");

    // Define which fields are available for data entry or editing
    $xcrud->fields("orderDate,status,requiredDate,shippedDate,comments");

    // Change the input type of the 'status' field to a select dropdown and provide options
    $xcrud->change_type("status","select","",array("Not Shipped"=>"Not Shipped","Shipped"=>"Shipped","Completed"=>"Completed"));

    // Make the 'requiredDate' field readonly when the 'status' is 'Shipped'
    $xcrud->readonly_logic("requiredDate","status","=","Shipped");

    // Make the 'shippedDate' field readonly when the 'status' is 'Shipped'
    $xcrud->readonly_logic("shippedDate","status","=","Shipped");

    // Render the xcrud instance to display the table and form
    echo $xcrud->render();	
?>