Building multidimensional array with input from 2 arrays

Question

It works fine creating level-1, but when level-2 is being created, it only updates the first letter of index [1].

Code:

// Position [Level-1]
$taxonomy_id = [
  "id_no_1",
  "id_no_2",
  "id_no_3",
];

// Position [Level-2]
$titles = [
  "title_1",
  "title_2",
  "title_3",
];

$array = [];


for ($i = 0; $i < count($taxonomy_id); $i++) {

//Construct level-1
$array[] = $taxonomy_id["{$i}"];

//Construct level-2
$array["{$i}"]["{$i}"] = $titles["{$i}"];

}

print_r($array);

Result:

(
    [0] => td_no_1
    [1] => it_no_2
    [2] => id_no_3
)

Wanted result:

Array
(
    [id_no_1] => Array
        (
            [0] => title_1
        )

    [id_no_2] => Array
        (
            [0] => title_2
        )

)

Nigel Ren · Accepted Answer · 2020-02-26 18:14:16Z

1

You would be better off creating the sub arrays in one go, you can also simplify "{$i}" with $i...

for ($i = 0; $i < count($taxonomy_id); $i++) {
    $array[$taxonomy_id[$i]] = [$titles[$i]];
}

answered Feb 26, 2020 at 18:14

Nigel Ren

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1 Comment

Toolbox Over a year ago

Would it be possible to add 2 sub-levels using the same for loop? I intended to add a separate question but my question quota for the day is breached.

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