[RESOLVED] Getting value from var of compiled var name.. if that makes sense, lol

benbox

Hey all!

I've got a massive grid of checkboxes being submitted into a script, they are in the form of name[id] where there are lots of names and lots of id's.

In my receiving script, I have every variable being created and assigned to a var, such as..

$var = "_POST['auth_read[52]']";

My question is, how can I revert this around to get the value of $_POST['auth_read[52]']?

I've tried $$var but that doesn't seem to work..

Can anyone help?

Many thanks in advance!

bradgrafelman

Why not simply create the variables as 'auth_read[52]' instead?

$var = "auth_read[52]";

echo $_POST[$var];

Weedpacket

You're making an array auth_read[], and storing it as an element in the $POST[] array. So it's not $POST['auth_read[52]'], it's $_POST['auth_read'][52].

phpshift

 $var = "auth_read\[52\]";

will that work?

bradgrafelman

Well, the problem isn't in the way the $var is populated, it starts with the form submission. When PHP see's a form element named "auth_read[52]", it thinks you're telling it that the POSTed array auth_read should have an array index 52 set to (value of POSTed element).

phpshift

$_POST["auth_read[52]"]; then?

bradgrafelman

No, because PHP populates the $_POST superglobal, and as I said, PHP already interpretted the element from the raw POST data as being an array.

benbox

Wow, lots of posts :eek:

$var = "auth_read[52]";

echo $_POST[$var];

At about 2am my time I finally thought of trying this, but it didn't seem to work for some reason.. so in the end I ended up scrapping the square brackets because I thought they the thing causing the problem (as it did in something I was doing in javascript yesterday too)..

Meaning I now had (to the effect of):

$var = "auth_read52"; 
echo $_POST[$var];

Which had the name and number bits built up from some other arrays I have.

Only thing with this is - it's a heck of a lot of variables now being posted.. rather than just 12 arrays, its more like 400 variables..

Would that be make a significant difference? (it seems like it would to me, but then again there is a fair amount of data in each array..)

Sooo..

You're making an array auth_read[], and storing it as an element in the $POST[] array. So it's not $POST['auth_read[52]'], it's $_POST['auth_read'][52].

I like that logic in that, going to have to try it I think (assuming arrays would be better to use)

Thanks very much for the help guys! 😃

Edit: And by the way, what is it with vBulletin that when you edit a post the first time, it works ok.. but when you edit again, it still has the very first posted text.. not updated with from first edit.. Meaning you have to re-do all your first revisions on the 2nd edit.. so annoying, lol

benbox

$_POST['auth_read'][52] works like a treat! So I have managed to get the arrays going through, and not all individually now!

And it's supprising how quickly you can think when you're not tired, lol.. I spent an hour last night messing about trying to figure out why a mysql delete command wasn't working.. it was because the name of the table was wrong.. but not just a typo, but a completely different table!

bradgrafelman

benbox wrote:
Edit: And by the way, what is it with vBulletin that when you edit a post the first time, it works ok.. but when you edit again, it still has the very first posted text.. not updated with from first edit.. Meaning you have to re-do all your first revisions on the 2nd edit.. so annoying, lol

It's actually just your browser's cache - this happens to me quite a bit, and sometimes I don't know and lose changes. Once you hit the Edit link, if the data is old, simply refresh the page in your browser.

benbox wrote:
So I have managed to get the arrays going through, and not all individually now!

So, problem solved? If so, don't forget to mark this thread resolved.

benbox

Ahh, got you.

Yes, all working well now - thank you!