assigning array elements from numbered variables

[bloodthrstylust]

i'm sure there must be an incredibely simple solution to this i haven't thought of so sorry if it's basic.

ok so all i want to do is basically if i have a list of variables such as this:

$var1="this";
$var2="that";
$var3="the other";

i want to do this:

$var[1] = $var1;
$var[2] = $var2;
$var[3] = $var3;

but i would like to do it in say a for loop for an unkown number of elements. the above method would be incredibley tedious for a larger number of variables!

thanks!

[trooper]

Try this

$var[] =array("this","that","the other");

foreach($var as $k=>$v)
{
  print "$k = $v";
}

the trick is the forech line

It will go through the array regardless of size - just what you are looking for.

HTH

GM

Originally posted by bloodthrstylust
i'm sure there must be an incredibely simple solution to this i haven't thought of so sorry if it's basic.

ok so all i want to do is basically if i have a list of variables such as this:

$var1="this";
$var2="that";
$var3="the other";

i want to do this:

$var[1] = $var1;
$var[2] = $var2;
$var[3] = $var3;

but i would like to do it in say a for loop for an unkown number of elements. the above method would be incredibley tedious for a larger number of variables!

thanks!

[ir4z0r]

I'd try this:

for ($i=0; $i < 3; $i++)
{
$var[] = ${$var$i};
}

(but why do you have the $var# vars?)

[trooper]

The only problem with the previous answer is that you have to know the total number of elements in the array 😃

Not trying to be negative - just pointing out a small problem 😃

HTH

GM

[ir4z0r]

but I guess if he has variables like $var# he KNOWS how many
vars he got!

nevertheless I doubt he really needs these :rolleyes:

[trooper]

Yeah he may know how many he has when its small but if the arrays in dynamically created then he may not know

Anyway we're all friends in here :p

[bloodthrstylust]

Originally posted by ir4z0r
I'd try this:

for ($i=0; $i < 3; $i++)
{
$var[] = ${$var$i};
}

(but why do you have the $var# vars?)

thanks for the help guys. it is essentially something like this that i want. there seems to be something snytactically wrong with this as i get a blank screen.

i've tried it without the for loop too:

$var1="this";
$i=1;
$type[1] = ${$var$i};

and it doesn't like that either.

any ideas?

ps. the var#s come from a form with groups of check boxes and i want to put each group into an array.

[ir4z0r]

now tested 😉

<?php

$var0=1;
$var1=2;
$var2=3;

$var = array();

for ($i=0; $i < 3; $i++) 
{ 
  $name = "var" . $i;
  $var[] = ${$name}; 
}

echo $var[0];
echo $var[1];
echo $var[2];

?>

but you can also use
<input type=checkbox name=boxes[] value=1>
<input type=checkbox name=boxes[] value=2>
...

in your script:
$boxes = $_POST['boxes'];
all selected boxes are set in $boxes
ie

if ($boxes['2']) echo "chbox2 is set"; // the ' are important

@: when (s)he declares vars like $var1, $var2 ... what has to
be done manually, he knows how many he got 😃

[rinjani]

If the vars are checkboxes from a form then they are fairly easy to access from the POST or GET array.

You can access the all the checkedd elements using their var name:

while($x = each($_POST['var_name']))
{
echo "$x[0] => $x[1]<BR>";
}

If you want to make a multidimensional array then something like:

$my_elements = array();

$my_elements[0] = $_POST['var_name'];

$my_elements[1] = $_POST['var_name2'];

Presumably you know how many checkbox groups there are so you can create a loop to do this by making an array of you checkbox names and looping through them

$checkboxes = array($POST['var1'], $POST['var2'], ...);

for ($i=0; $i <=sizeof($checkboxes); $i++) {

$my_elements[$i] = $checkboxes[$i];

}

ought to create an multidimensional array for you.

HTH