[Resolved] _POST question

[szz]

Hi!

I want to know what is the value of $_POST['textfieldname'] if I load the php file for the first time without specifying a value for the textfiled.
Thanks.

[kcgame]

Should be NULL

You can test it by

if ($_POST['textfieldname']==NULL) 
// code here

[bradgrafelman]

Actually, it's not even NULL; it's not defined.

The indeces of superglobals are defined as they are used. Using the code posted by kcgame will produce an E_NOTICE for the use of an undefined variable. It's better to either:

1. Declare a variable, using the $_POST[]'s value if it exists, or a NULL value if it does not:

$textfieldname = (!empty($_POST['textfieldname']) ? $_POST['textfieldname'] : '');

2. Use a function that does not error on undefined variables:

if(isset($_POST['textfieldname'])) {
    // it exists, meaning the form was submitted
} else {
    // it didn't exist; form wasn't submitted
}