CODEWITHSUNDEEP
php
freento
freento

Reputation: 2949

PHP merging 3 arrays

I have 3 arrays:

array(1, 5, 1);
array(3, 2, 7, 5 ,4);
array(4, 3, 6, 5)

I want to merge them and get such result:

array(
    array(1, 3, 4),
    array(5, 2, 3),
    array(1, 7, 6),
    array(5, 5),
    array(4)
);

What is the easiest way?

Upvotes: 1

Views: 96

Answers (4)

bystwn22
bystwn22

Reputation: 1794

Is this what you want?
You can use array_map

<?php
  $a  = array( 1, 5, 1 );
  $b  = array( 3, 2, 7, 5 ,4 );
  $c  = array( 4, 3, 6, 5 );

  $d  = array_map( function() {
    return array_filter( func_get_args() );
  }, $a, $b, $c );

  print_r( $d );
?>

Output

Array
(
    [0] => Array
        (
            [0] => 1
            [1] => 3
            [2] => 4
        )

    [1] => Array
        (
            [0] => 5
            [1] => 2
            [2] => 3
        )

    [2] => Array
        (
            [0] => 1
            [1] => 7
            [2] => 6
        )

    [3] => Array
        (
            [1] => 5
            [2] => 5
        )

    [4] => Array
        (
            [1] => 4
        )

)

Upvotes: 1

Niet the Dark Absol
Niet the Dark Absol

Reputation: 324650

Assuming you have the latest version of PHP (5.5), you can use this:

$input = array(
    array(1,5,1),
    array(3,2,7,5,4),
    array(4,3,6,5)
);
$output = array_column($input,null);

If you don't have the latest version, see the original PHP version for a shim.

Alternatively, for this specific case (ie. a specialised shim), try this:

$input = array(...); // see code block above
$output = array();
foreach($input as $arr) foreach($arr as $i=>$v) $output[$i][] = $v;

Upvotes: 3

Paul
Paul

Reputation: 141827

$arrs = array(
  array(1, 5, 1),
  array(3, 2, 7, 5, 4),
  array(4, 3, 6, 5),
);

$result = array();
$num_arrs = count($arrs);
for($i = 0; $i < $num_arrs; $i++){
  $size = count($arrs[$i]);
  for($j = 0; $j < $size; $j++){
    if(!isset($result[$j]))
      $result[$j] = array();
    $result[$j][] = $arrs[$i][$j];
  }
}

Demo

Upvotes: 5

vollie
vollie

Reputation: 1015

$arrays = array(
  array(1, 5, 1),
  array(3, 2, 7, 5 ,4),
  array(4, 3, 6, 5)
);
$combined = array();
foreach($arrays as $array) {
  foreach($array as $index => $val) {
     if(!isset($combined[$index])) $combined[$index] = array();
     $combined[$index][] = $val;
} }

After that $combined holds what you want.

Upvotes: 1

Related Questions