How should one check if a zval is "undefined" ?

Hi,

On Wed, May 7, 2014 at 10:45 AM, Aaron Lewis the.warl0ck.1989@gmail.comwrote:

Hi,

I'm trying to check if a zval is undefined,

But Z_STRLEN_P(return_value) == 0 seems incorrect, 'case the strlen
part sometimes returns a negative value

Shouldn't you already know whether you had set return_value to something
in particular?

In any case, undefined (or null) is defined as a special type:

if (Z_TYPE_P(return_value) == IS_NULL) { ... }

So, what's the right way to do it? Even regardless of the zval type

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Aaron Lewis - PGP: 0x13714D33 - http://pgp.mit.edu/
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Tjerk