PHP: Issue combining sub-arrays into new array

Question

Working on a poll script, but I have little problems with the options of a poll, creating a new array of it.

The actual example array contains 3 sub-arrays with options, sum of votes and percentage:

Array
        (
            [poll_options] => Array
                (
                    [0] => Good
                    [1] => Bad
                    [2] => I do not care
                )

            [poll_answers] => Array
                (
                    [0] => 3
                    [1] => 1
                    [2] => 1
                )

            [poll_percentage] => Array
                (
                    [0] => 60
                    [1] => 20
                    [2] => 20
                )

        )

Now I need to create a new array of the values, the result must be like this:

Array
        (
            [0] => Array
                (
                    [option] => Good
                    [answers] => 3
                    [percentage] => 60
                )

            [1] => Array
                (
                    [option] => Bad
                    [answers] => 1
                    [percentage] => 20
                )

            [2] => Array
                (
                    [option] => I do not care
                    [answers] => 1
                    [percentage] => 20
                )

        )

Whatever tried so far, I just can't reach this result I want. Any ideas?

@HaimEvgi: posting everything I tried today already and I would hit the maximum allowed characters of a question. I think for this question it is not needed to post more code as I did. — lickmycode, Dec 26 '13 at 15:54

score 3 · Accepted Answer · answered Dec 26 '13 at 15:51

3

$new_array = array();
foreach (array_keys($old_array['poll_options']) as $i) {
    $new_array[] = array(
        'option' => $old_array['poll_options'][$i],
        'answers' => $old_array['poll_answers'][$i],
        'percentage' => $old_array['poll_percentage'][$i]
    );
}

DEMO

answered Dec 26 '13 at 15:51

Barmar

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That's it I think. Let me test it quickly. – lickmycode Dec 26 '13 at 15:56
Yes that works! Thank you Barmer, I will mark this as correct answer in 3 minutes when I may to do so! – lickmycode Dec 26 '13 at 16:00
What part of this trivial loop was so difficult? – Barmar Dec 26 '13 at 16:04
I just totally forgot about 'array_keys()', was always stuck with 'array_merge()'. I'm getting old... Thanks again :) – lickmycode Dec 26 '13 at 22:19

score 1 · Answer 2 · edited Dec 27 '13 at 13:00

1

$newArray=Array();
$count=count($array["poll_oprions"]);
for ($i = 0; $i < $count; $i++) {
    $newElem=Array(); 
    $newElem["option"]=$array["poll_option"][$i];
    $newElem["answers"]=$array["poll_answers"][$i];
    $newElem["percentage"]=$array["poll_percentage"][$i];
    $newArray[]=$newElem;
}

edited Dec 27 '13 at 13:00

Ahmed Siouani

13,701
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answered Dec 26 '13 at 15:52

Alexander.Shtanko

447
2
11

Amal Murali · Answer 3 · 2013-12-26T16:03:55.160

0

Use array_column():

$new_array = array();
$new_array[] = array(
    'option' => array_column($old_array, 0),
    'answers' => array_column($old_array, 1),
    'percentage' => array_column($old_array, 2),
);

Demo.

Note that this function is => PHP 5.5.0. If you're using an older version of PHP, you can use the implementation written in plain PHP (by the author of this function). It's available on GitHub.

edited Dec 26 '13 at 16:03

answered Dec 26 '13 at 15:52

Amal Murali

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PHP: Issue combining sub-arrays into new array

3 Answers3