Forcing a field

[M.Abbasi]

Hi!
I have a code for contact form.
It has a field for attach images. I want to Force users for send an image.
How can I do it?

I attached the code.
[sorry for my bad English  ]

[Sazze]

Check if it's empty (replace myField to whatever you field name is)

if (empty($_POST['myField']))
{
    die('Do not leave the field empty.');
}