Creating nested parent child array from one dimensional array in php

Question

I have 2 array.

First Array:

$array = array( 
   'a' => 'b',
   'b' => 'c',
   'c' => 'd',
);

Second Array:

 $array =  Array
    (
        [a] => Array
            (
                [0] => b
                [1] => h
            )

        [b] => c
        [c] => d
        [h] => m
    )

i need to change this array like

First array:

Array
(
    [a] => Array
        (
            [b] => Array
                (
                    [c] => Array
                        (
                            [d] => d
                        )

                )

        )

)

Second Array:

Array
(
    [a] => Array
        (
            [b] => Array
                (
                    [c] => Array
                        (
                            [d] => Array
                                (
                                )

                        )

                )

            [h] => Array
                (
                    [m] => Array
                        (
                        )

                )

        )

)

sirwilliam answers helped for first array problem. and I need it for multi dimensional array. Help to resolve the problem. Thanks in advance

@Uchiha I tried with array_walk_recursive and used this function function myfunction($products, $value){ foreach($products as $key => $product){ if ( $product === $value ){ return $key; }else{ return $product; } } } — Jegan
– Jegan, Commented Jun 10, 2015 at 12:30
@Jegan you should not post code in comments, you should edit your question. — Alex
– Alex, Commented Jun 10, 2015 at 12:32

botenvouwer · Accepted Answer · 2015-06-10 13:01:09Z

8

You can try to use & (references):

PHP:

    $array = array( 
       'a' => 'b',
       'b' => 'c',
       'c' => 'd',
    );

    $newArray = array();
    $newArray[key($array)] = array();
    $part = &$newArray;

    foreach($array as $first => $second){
        $part = &$part[$first];
        $part[$second] = array();
    }

    echo "<pre>";
    print_r($newArray);
    echo "</pre>";

?>

Result:

Array
(
    [a] => Array
        (
            [b] => Array
                (
                    [c] => Array
                        (
                            [d] => Array
                                (
                                )

                        )

                )

        )

)

Then you can create a loop for the last part.

edited Jun 10, 2015 at 13:01

answered Jun 10, 2015 at 12:29

botenvouwer

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4 Comments

RichardBernards Over a year ago

this is always starting at index 'a'... Is this desired behaviour?

Alex Over a year ago

What if there is 'cat' => 'over a tree', ?

Jegan Over a year ago

@sirwilliam If i have multi dimensional array?. Can you help me

botenvouwer Over a year ago

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