how elasticsearch exclude a specific value?

How do you exclude a value in an HTML validation drop box?

• Hi, I am doing a website for my assignment and I have created a sign up page. On the page, there is a drop down section for "Title" (your status). I have added 'Title, Miss, Mr, Mrs and Ms' onto the drop down value. If someone has pressed the submit button on the form with 'Title' selected from the title drop down, I want the form to pop up a message saying invalid or something alone those lines. Therefore, the usercan only select from Mr, Miss, Mrs and Ms. So i am wondering what is the code to inform the user that the 'Title' status is invalid. Sorry if this doesnt make any sense. I hoep you all understand where i am coming from. Thank you

• Answer:

  It is called form validation which is done on the server when the form is submitted (It can also be done client side with javascript - but you must always validate on the server side for security) lets assume that the drop down input (selection) has a name of 'title' create a file called form_validation.php if(isset($_POST)) // Check that the form has been submitted by post method { $title = isset($_POST['title'] ? $_POST['title'] : NULL; // Always check if the field was set in the form if($title && $title != 'Title') // checks that it is not null and does not equal the default { return true; // you can now continue processing the form after validating the rest of the form } else } return false; // Reload the form with an error message { }