PHP refering to a HTML textfield

[Fearless_Fish]

Hi,

I'm currently attempting to incorporate some validation into a page but have come across a problem.

The page contains several textfields that require information entering into them - on clicking Submit these details are entered into a database.

However, before the page is submitted, I want to be able to check whether the fields are empty or not, or check whether they contain non-numeric values for example.

The code I currently have can test PHP variables and submits the form if the conditions are passed, or displays a pop up box if the conditions are not passed. How do I refer to a html textfield as opposed to a php variable though?

Thanks in advance.

[rincewind456]

The text field will/should have a name, as in name="somename", this will be passed either by POST or GET, depending on which form action your using.

So the variable $_POST['somename'] will hold the contents of the textarea, upon which you can do as you wish.

But to check before it has been passed back to the server you will need javascript.

[gardnc]

The form data passed back to the php page can be referred to as php variables as $POST['textbox name'] or $GET['textbox name'] depending on whether the method in the form is a post or a get. Query strings can also be referred to as $_GET['ssfsdf'] variables.