PHP array of arrays. Checkboxes to be ticked depending on inner array values

Question

I have arrays of Strings(that are each a combination of numbers "1" to "20") inside another array in PHP. I want to pre-tick the corresponding checkboxes (1 - 20) for each of my pages (these start at 0 and go on for potentially very many).This way the user can go to a page and see which boxes have been selected before.

For example:
Array [0] is {1, 2, 4} so these checkboxes should be checked when the user arrives at page 0.

This is what I have so far to try and get the values of the inner array:

foreach ($categoriesArr as $val) {
    if (is_array($val)) {
        foreach ($val as $innerVal) {
            // See which checkboxes are checked.
            if ($innerVal === "1") {
                $cb1 = true;
            } else {
                $cb1 = false;
            }
        }
    }
}

I know I can use <?php if ($cb1) echo "checked" ?> in the checkbox HTML to show it as ticked.
This is ok but it obviously loops through all the arrays and $cb1 will eventually end up as whatever the last arrays value is.
Should I introduce yet another array to store each individual pages checkbox values in? I am potentially dealing with thousands of entries so would like to keep any extra assignments to a minimum.

Off topic but is $innerVal a string? Else $cb1 is always false because of the === operator. — Daan
– Daan, Commented Nov 10, 2014 at 15:20
$innerVal is indeed a String sir, question ammended to reflect that — Ḟḹáḿíṅḡ Ⱬỏḿƀíé
– Ḟḹáḿíṅḡ Ⱬỏḿƀíé, Commented Nov 10, 2014 at 15:22
Could you elaborate on what informations you want to have after the foreach? Checkboxes checked on each page seperatly? Checkboxes checked on all pages combined? — Jonathan
– Jonathan, Commented Nov 10, 2014 at 15:27
I want the user to be able to see which checkboxes have been pre-selected for each page, on each page, so page 2 may have different boxes from page 4 for example. — Ḟḹáḿíṅḡ Ⱬỏḿƀíé
– Ḟḹáḿíṅḡ Ⱬỏḿƀíé, Commented Nov 10, 2014 at 15:30

Grengas · Accepted Answer · 2014-11-10 16:01:15Z

1

I would suggest to have variable that holds page's index, and then you just include this into each checkbox: <?php if(is_array($categoriesArr[$pageIndexVariable]) && $categoriesArr[$pageIndexVariable][$checkboxNameOrIdOrwhatever]) echo "checked" ?>

answered Nov 10, 2014 at 16:01

Grengas

1,11415 silver badges18 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Ḟḹáḿíṅḡ Ⱬỏḿƀíé Over a year ago

Thanks, I realise how simple this is now. I think I was making life hard for myself but I can finish this now :)

Collectives™ on Stack Overflow

PHP array of arrays. Checkboxes to be ticked depending on inner array values

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related