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Date: Mon, 5 May 2014 00:28:08 +0800
To: Aaron Lewis <the.warl0ck.1989@gmail.com>
Subject: Re: [PHP-DEV] Is it possible to get the variable name from the HashTable structure?
From: tjerk.meesters@gmail.com (Tjerk Meesters)

Hi,

> On 4 May, 2014, at 11:54 pm, Aaron Lewis <the.warl0ck.1989@gmail.com> wrot=
e:
>=20
> FWD I forgot to CC the list ;-(
>=20
> ---------- Forwarded message ----------
>=20
>=20
> Here's what I want,
>=20
> If a user runs code like this, and $_GET['MH'] happens to be
> undefined, I want to know both '_GET' and 'MH':

I suppose you could compare the hash table against the few super globals the=
re are :)

>=20
> if ($_GET['MH'] =3D=3D 'dog')
> {
>      do-something
> }
>=20
> But so far I can only get the 'MH' part ( I checked the 'Undefined
> index' part in a zend function, can't remember the exact name )
>=20
>=20
>=20
> On Sun, May 4, 2014 at 11:46 PM, Johannes Schl=A8=B9ter
> <johannes@schlueters.de> wrote:
>> On Sun, 2014-05-04 at 16:13 +0100, Joe Watkins wrote:
>>>> On Sun, 2014-05-04 at 20:21 +0800, Aaron Lewis wrote:
>>>> Hi,
>>>>=20
>>>> So PHP uses HashTable to store variables like $_POST,
>>>>=20
>>>> =46rom a HashTable structure, can I get the array name?
>>=20
>> No, a zval (which might point to a hash tale) doesn't refer to a name.
>> For one there in 99.99% is no need but it would cost memory(and CPU
>> cycles to maintain) and then there miht e multiple nae (references) or
>> none (temporaries etc.)
>>=20
>> If you know the parent such hacks like
>>=20
>>> https://gist.github.com/krakjoe/50603be7ffb1ae6e9156
>>=20
>> might work, but even this solution is flawed: The easy thing it doesn't
>> support is references, it should return an array of all names. It won't
>> work for complex things, though.
>>=20
>> If you need such a functionality I'd suggest to take a step back and
>> think what you actually want to do ... usually there is a better
>> solution.
>>=20
>> johannes
>=20
>=20
>=20
> --
> Best Regards,
> Aaron Lewis - PGP: 0x13714D33 - http://pgp.mit.edu/
> Finger Print:   9F67 391B B770 8FF6 99DC  D92D 87F6 2602 1371 4D33
>=20
>=20
> --=20
> Best Regards,
> Aaron Lewis - PGP: 0x13714D33 - http://pgp.mit.edu/
> Finger Print:   9F67 391B B770 8FF6 99DC  D92D 87F6 2602 1371 4D33
>=20
> --=20
> PHP Internals - PHP Runtime Development Mailing List
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>=20