Multi-dimensional arrays

cstrzelc

Hello,

Does anyone know if it is possible to pass multi-dimensional arrays via POST or GET. I searched and the last post I saw on this topic was in the year 2000! Back then the opinion was that PHP only supported one dimensioanl arrays. Please let me know.

This is the general idea of what I want to do:

############

echo "<form ...... method=\"post\" action=\"myscript.php\">";
...
...
...
for ($i=0; $i=$num; $i++) {

for ($m=0; $m<$UsrSetsQTY[$i]; $m++) {

           echo "<td>";

           echo "<input name=\"UsrWghtSetEntry[$i][$m]\" type=\"text\" size=\"3\" value=\"".$UsrWghtSet[$i][$m]."\"></td>\n";
 			     }

}

In myscript.php I want to catch it like so:

$m=0;
for ($i=0; $i<$num; $i++) {

 for ($m=0; $m<$UsrSetsQTY[$i]; $m++) {

      $UsrWghtSetEntry[$i][$m] = $_POST['UsrWghtSetEntry'][$i][$m];

      echo "loop = $UsrSetsQTY[$i] value = $UsrWghtSetEntry[$i][$m]<br>";
 }

}

Thanks for any help...

rulian

not via post or get, either method can only hold strings
you can pass it via session variables.

$_SESSION["myarray"] = $YourArray;

if you are unfamiliar with sessions check them out on www.php.net
look up the function sesssion_start()

cstrzelc

I didn't see you're reply but I was able to catch all my values through $_POST. Here's how i did it:

for ($i=0; $i<$num; $i++) {

 for ($m=0; $m<$UsrSetsQTY[$i]; $m++) {
      $UsrWghtSetEntry[$i][$m] = $_POST['UsrWghtSetEntry'][$i][$m];
}

}

Is there any advantage to me using it via session?

Thanks,
-cs

cstrzelc

Ok Sorry to keep reposting like this, but I still see a small problem.

I was able to echo out my values no problem withing Explorer. However, Firefox does not echo the value out.

var_dump($UsrWghtSetEntry);

returns all the values.. This is quite weird, and I'm not sure what the problem is.

-cs

rulian

browser cannot affect how your PHP behaves, rather it shouldnt.
The difference between session and post values is the session data does not get transmitted via the web and therefore is not visible to traffic, at least not to a non cleaver hacker. If you the values arent changing I say stick to session, otherwise if it works for you then it works, really doest matter how you climb a rock it really only matters if you make it up.

cstrzelc

Thank you for the reply's. Yes the browser was my stupid mistake 🙂

However, I do have a question about $_POST. Is it possible for anyone to change (hack) values of a hidden form field.

I am trying to secure my input fields in the form as best I can. However, I was just wondering if there is a way for anyone to get at the values of my variables that are being passed through a hidden form field with $_POST. I want to make sure that it do this right the first time and secure it to the best of my abilities.

Thanks,
-cs

laserlight

Is it possible for anyone to change (hack) values of a hidden form field.

Yes.

I am trying to secure my input fields in the form as best I can. However, I was just wondering if there is a way for anyone to get at the values of my variables that are being passed through a hidden form field with $_POST. I want to make sure that it do this right the first time and secure it to the best of my abilities.

It is good to ssume that any input that comes from the client can be altered, or perhaps not even exist.