Hey.

The isset (http://php.net/isset) and empty (http://php.net/empty) functions are also handy when validating form data. (or any data, for that matter)

Hey.

What do you mean by "a message system"?
Like a blog, or like a messenger?

If it's a blog, there are probably hundreds of codes available online for you to choose from. Wordpress...

Agreed. Like I say, ideally these sort of bugs should be hunted down and fixed, even though the code may function without it.

Hey.

I'm sorry mate, you are going to have to explain that a LOT better if you want us to be able to provide any sort of useful responses.

Try showing us the code you have, and tell us what...

Hey.

Rather then doing if (!$text), try doing if (empty($text)).

Or, better yet, design your if statements so anything you don't expect falls through to the "else" clause:

$value =...