How can I create an associative array using for each?

Question

I am selecting checkboxes and want to save in an associative array with current page number $_GET['page_no'] as it's index, but only 1 value goes in, why no other?

$pageno = $_GET['page_no']; //Say page no is 1
$_SESSION['selected_vals'] = array();
foreach($_POST['record_num'] as $throw_rec_nums) {
    $_SESSION['selected_vals'][$pageno] = $throw_rec_nums;
}

What I expect

$_SESSOION['selected_val'] (
   [1] => 24
   [1] => 46
   [1] => 56
)

But I only get 24 even if 3 checkboxes are selected

Note: $_GET['page_no'] is returned as array

@FabianoLothor If am using $_GET['record_num'] it is obvious that am using <input type="checkbox" name="record_num[]" /> — Creepy Frog
– Creepy Frog, Commented Feb 15, 2013 at 17:10
What you expect is impossible. You can't have multiples values for a key. — gen_Eric
– gen_Eric, Commented Feb 15, 2013 at 17:18

Chris Bornhoft · Accepted Answer · 2013-02-15 17:09:28Z

3

$pageno is not incrementing. In order for more than one value to be added to the array, it needs to be incremented while in the loop.

A solution would be something like:

$_SESSION['selected_vals'][$pageno][] = $throw_rec_nums;

That way all record numbers would be saved to the array at the page number specified.

answered Feb 15, 2013 at 17:09

Chris Bornhoft

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2 Comments

Creepy Frog Over a year ago

ok but that creates array inside an array and uses incremened index, any idea I can keep 1 for all ? and thank you +1

gen_Eric Over a year ago

@CreepyFrog: Arrays can only have one value per key. What you want is impossible.

Heberfa · Accepted Answer · 2013-02-15 17:10:20Z

2

Only 1 value goes in because your are replacing $_SESSION['selected_vals'][$pageno] value on each loop of foreach.

try create a counter to index it

it is a option

$_SESSION['selected_vals'] = array();
$_SESSION['selected_vals'][$pageno] = array();
foreach($_POST['record_num'] as $throw_rec_nums) {
    $_SESSION['selected_vals'][$pageno][] = $throw_rec_nums;
}

answered Feb 15, 2013 at 17:10

Heberfa

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1 Comment

Heberfa Over a year ago

Is impossible to index all with 1 ... (think with me) how can you access some value if all is index in same key? like you expect, with value may return $_SESSION['selected_val'][1]?

Fabian Schmengler · Accepted Answer · 2013-02-15 17:14:52Z

0

You cannot use an array as array index. You will have to iterate over $pageno too, for example with next():

$array[current($pageno)] = ...;
next($pageno);

Note that this will only work if you make sure rt that $pageno actually IS an array and contains enough elements.

edited Feb 15, 2013 at 17:14

answered Feb 15, 2013 at 17:08

Fabian Schmengler

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2 Comments

Creepy Frog Over a year ago

I am using foreach so the value returned is not an array :)

Fabian Schmengler Over a year ago

But you don't foreach over $pageno and said that was an array. Well, now I see your expectation, this is just impossible. Keys are unique.

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