PHP ksort for multi-dimensional array?

Question

I would like to apply ksort in a multi-dimensional array. The goal is to sort numeric index for each level.

I tried to do a function to do this but it does not work.

function ksort_r( array &$array ){   /* ksort() for multi-dimensional array*/
    ksort( $array );
    foreach ( $array as $key=>$item ){
        if( is_array( $item ) ){
            ksort_r( $item );
        }
    }
}

example

$array = array( 
   1 => array(
        "columns" => array(
             2 => array(),
             0 => array(),
             1 => array(),
        )
   ),
   0 => array(
        "columns" => array(
             2 => array(),
             1 => array(),
             0 => array(),
        )
   )
)

output wishes :

array( 
   0 => array(
        "columns" => array(
             0 => array(),
             1 => array(),
             2 => array(),
        )
   ),
   1 => array(
        "columns" => array(
             0 => array(),
             1 => array(),
             2 => array(),
        )
   )
)

this question have been asked like 1000 times in here... maybe use search instead of asking it again? — Flash Thunder, Jan 08 '18 at 17:29

score 1 · Accepted Answer · edited May 05 '23 at 05:38

1

You forgot to pass the value in foreach as reference too:

foreach ( $array as $key=> &$item ) {

Or update the array index with the sorted $item:

ksort_r($item);
$array[$key] = $item;

edited May 05 '23 at 05:38

Nimantha

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answered Jan 08 '18 at 17:37

rogeriolino

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PHP ksort for multi-dimensional array?

1 Answers1