check input for null values

[Anon]

Hi!

I need help with checking if an input value in a form is or is not.
If value is null, fwrite should not be executed, and this should be repeated for several input fields.
Someone who can help me with the code?

[Anon]

Just take the input value and run it by empty.

ex. Lets say your input field name is username.

After the form is submitted you can just use something like.

if ((empty($username))
{
//do something if is empty
}else{
//do domething else
}

is this what you are looking for.

[Anon]

Yes, it's what I meant! Thanks!

[Anon]

But how do I write "not empty" since I want it to do nothing if it is really empty?
i.e. what is the syntax for "not"?

[Anon]

!empty()

the ! means not.

ex:

if (!empty($username))
{
// do something if not empty
}