use of variable variables

[phpcoderz]

Hi there,

I have a problem with variable variables. I try to do the following:

$fields[] = "email";
$required_fields[] = "_POST['{$reserved_keys[0]}']";

print $required_fields[0];

The result is _POST['email']

print $_POST['email'];

The result is the correct email address recieved from a form.

print ${$required_fields[0]};

This is where the problem occurs. The output is just blank but I thought I could get the email address like in the print command before. Isn't it possible to cascade variable variables?

register_globals is off so I cannot use the global variables but have to use $_POST.

As you can see "fields" is an array which will hold a couple of values later on and I would like to be able to process it in a loop. Therefore I need variable variables.

Cheers, 😕
Uli

[diego25]

Read the documentation. It says that variable variables won't work with superglobals.

Diego

[phpcoderz]

I'm a PHP newbie and wasn't familiar with the structure of the documentation. I searched it but couldn't find this hint. Meanwhile I've found it myself.

Anyway, thanks for the hint.

Cheers,
Uli