[RESOLVED] I need help grabbing the value of a variable with a dynamic name

[schwim]

Hi there guys,

on the form page, I generated a random 4 digit number. I then appended that number to the beginning of my html form elements, so:

using
$SESSION['AS_seed'] = mt_rand(1000, 9999);
$AS_seed = $SESSION['AS_seed'];

name='first_name' became name='3040first_name'
name='email' became name='3040email'

etc.

I got that part figured out just fine. My problem is when submitting the form, I don't know how to append the random number to the value 🙂

I am passing the number just fine, as I can print it to screen, I just don't know how to alter the following string:

$email = substr ($_POST['email'], 0, 100);

into

$email = substr ($_POST['3040email'], 0, 100);

I tried:

$email = ($_SESSION['AS_seed'].substr ($_POST['email'], 0, 100));

which prints just the random number

and

$email = substr (($_SESSION['AS_seed']).($_POST['3040email'], 0, 100);

which as I'm sure you can imagine went horribly 😉

how do I turn $POST['email'] into $POST['3040email'] , 3040 being the random number being held by $_SESSION['AS_seed'] ?

thanks,
json

[jkurrle]

$new_string=$AS_Seed."email";
$email = substr ($_POST[$new_string], 0, 100); 

Note, there are no quote marks around $new_string.

Hope this helps...

[schwim]

Hi there,

I tried it this way, and it worked:

email = $_POST[$_SESSION['AS_seed'].'email'];

Is that a clean way to do it, or is my code shameful?

thanks,
json

[jkurrle]

That's pretty readable to me. If it works, I say go for it.