Transpose convert column values of multi dimensional array into flat array

Question

initial array is looks like this:

$arInitial = Array(
  0 => Array(1,2,3), 
  1 => Array(3,4),
  2 => Array(5,6,7,8),
  3 => Array(9)
);

The resulting array should be:

Array(1,3,5,9,2,4,6,3,7,8);

I was thinking about while(1) loop, but nothing. Any ideas?

So this is not just sorting. You also want to merge several arrays into a single one. — Jocelyn
– Jocelyn, Commented Jun 8, 2016 at 0:06
@Jocelyn I agree, it's not only sorting. I need some thoughts how can i implement this — alvery
– alvery, Commented Jun 8, 2016 at 0:08

Kevin · Accepted Answer · 2016-06-08 00:13:05Z

4

There are myriad of ways to get this, there's already a collection of array incantation function that does this, I just can't find the dup question yet, but another way is just to array_shift each batch:

$result = array();
$max = count($arInitial);
for($i = 0; $i < $max; $i++) {
    foreach($arInitial as &$a) {
        if(!empty($a)) {
            $e = array_shift($a);
            $result[] = $e;
        }
    }
}

answered Jun 8, 2016 at 0:13

Kevin

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Comments

J. Pichardo · Accepted Answer · 2016-06-08 00:31:42Z

1

You should try two functions:

array_merge
array_unique With sort_flags

Probably you want something like

$finalArray = array();
foreach($arInitial as $array){
    $finalArray = array_merge($finalArray, $array);
}

var $finalArray = array_unique($finalArray , SORT_NUMERIC);

That way you should get the result you want.

edited Jun 8, 2016 at 0:31

answered Jun 8, 2016 at 0:17

J. Pichardo

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