How to convert two dimensional array to one dimensional array in php?

Question

I am Having an mutidimensional array getting result like given below

Array
(
    [0] => Array
        (
            [0] => 70
        )

    [1] => Array
        (
            [0] => 67
        )

    [2] => Array
        (
            [0] => 75
            [1] => 73
            [2] => 68
        )

    [3] => Array
        (
            [0] => 68
        )

    [4] => Array
        (
            [0] => 76
        )

)

But I need to convert it to single array

And I want to convert in to single dimensional array as

Array
(
[0] => 70
[1] => 67
[2] => 75
[3] => 73
[4] => 68
[5] => 68
[6] => 76
)

How to convert it using php functions?

Or Is there any other way to do it?

possible duplicate of [How to "flatten" a multi-dimensional array to simple one in PHP?](http://stackoverflow.com/questions/526556/how-to-flatten-a-multi-dimensional-array-to-simple-one-in-php) — Prasanth Bendra, Jul 17 '14 at 08:58

score 15 · Accepted Answer · edited Dec 21 '12 at 10:54

15

You can try

$it =  new RecursiveIteratorIterator(new RecursiveArrayIterator($data));
$l = iterator_to_array($it, false);

var_dump($l); // one Dimensional

edited Dec 21 '12 at 10:54

Ja͢ck

170,779
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answered Dec 21 '12 at 09:56

Baba

94,024
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And Also we Can Add sort($l); $l = array_unique($l); for removing duplicate elements and for proper indexing for new array – Durgesh Sonawane Dec 21 '12 at 12:18

score 2 · Answer 2 · answered Dec 21 '12 at 09:45

2

Try with:

$input  = array(/* your array*/);
$output = array();

foreach ( $input as $data ) {
  $output = array_merge($output, $data);
}

answered Dec 21 '12 at 09:45

hsz

148,279
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Just use `$final` instead of `$input`. – hsz Dec 21 '12 at 11:45

Ja͢ck · Answer 3 · 2012-12-23T05:45:11.227

1

You can use array_walk_recursive() for that coupled with a closure:

$res = array(); // initialize result

// apply closure to all items in $data
array_walk_recursive($data, function($item) use (&$res) {
    // flatten the array
    $res[] = $item;
});

print_r($res); // print one-dimensional array

edited Dec 23 '12 at 05:45

answered Dec 21 '12 at 10:18

Ja͢ck

170,779
38
263
309

maček · Answer 4 · 2012-12-21T09:55:57.913

0

This should do the trick

$final = array();
foreach ($outer as $inner) {
  $final = array_merge($final, $inner);
}
var_dump($final);

Or you could use array_reduce() if you have PHP >= 5.3

$final = array_reduce($outer, function($_, $inner){
  return $_ = array_merge((array)$_, $inner);
});
var_dump($final);

edited Dec 21 '12 at 09:55

answered Dec 21 '12 at 09:46

maček

76,434
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score 0 · Answer 5 · answered Dec 21 '12 at 10:42

For a more generic function which can deal with multidimensional arrays, check this function,

function  arrayFlattener($input = array(), &$output = array()) {
  foreach($input as $value) {
    if(is_array($value)) {
        arrayFlattener($value, $output);
    } else {
        $output[] = $value;
    }
  }
}

You can find an example here.

score 0 · Answer 6 · answered Jun 27 '14 at 15:33

By using this function you can convert any dimension array into a single dimention array.

$result = array();
$data = mearchIntoarray($result,$array);
function mearchIntoarray($result,$now)
{
    global $result;
    foreach($now as $key=>$val)
    {
        if(is_array($val))
        {
            mearchIntoarray($result,$val);
        }
        else
        {
            $result[] = $val;
        }
    }
    return $result;
}

Where $array is your given array value.

How to convert two dimensional array to one dimensional array in php?

6 Answers6

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