PHP - recursive Array to Object?

Question

Is there a way to convert a multidimensional array to a stdClass object in PHP?

Casting as (object) doesn\'t seem to work recu

Answer 1

Late, but just wanted to mention that you can use the JSON encoding/decoding to convert fully from/to array:

//convert object $object into array
$array = json_decode(json_encode($object), true);
//convert array $array into object
$object = json_decode(json_encode($array));

json_encode and json_decode functions are available starting from php 5.2

Answer 2

Here is a smooth way to do it that can handle an associative array with great depth and doesn't overwrite object properties that are not in the array.

    <?php

    function setPropsViaArray( $a, $o )
    {
        foreach ( $a as $k => $v )
        {
            if ( is_array( $v ) )
            {
                $o->{$k} = setPropsViaArray( $v, ! empty ( $o->{$k} ) ? $o->{$k} : new stdClass() );
            }
            else
            {
                $o->{$k} = $v;
            }
        }
        return $o;
    };

    setPropsViaArray( $newArrayData, $existingObject );

Answer 3

function toObject($array) {
    $obj = new stdClass();
    foreach ($array as $key => $val) {
        $obj->$key = is_array($val) ? toObject($val) : $val;
    }
    return $obj;
}

Answer 4

Some of the other solutions posted here fail to tell apart sequential arrays (what would be [] in JS) from maps ({} in JS.) For many use cases it's important to tell apart PHP arrays that have all sequential numeric keys, which should be left as such, from PHP arrays that have no numeric keys, which should be converted to objects. (My solutions below are undefined for arrays that don't fall in the above two categories.)

The json_decode(json_encode($x)) method does handle the two types correctly, but is not the fastest solution. It's still decent though, totaling 25µs per run on my sample data (averaged over 1M runs, minus the loop overhead.)

I benchmarked a couple of variations of the recursive converter and ended up with the following. It rebuilds all arrays and objects (performing a deep copy) but seems to be faster than alternative solutions that modify the arrays in place. It clocks at 11µs per execution on my sample data:

function array_to_object($x) {
    if (!is_array($x)) {
        return $x;
    } elseif (is_numeric(key($x))) {
        return array_map(__FUNCTION__, $x);
    } else {
        return (object) array_map(__FUNCTION__, $x);
    }
}

Here is an in-place version. It may be faster on some large input data where only small parts need to be converted, but on my sample data it took 15µs per execution:

function array_to_object_inplace(&$x) {
    if (!is_array($x)) {
        return;
    }
    array_walk($x, __FUNCTION__);
    reset($x);
    if (!is_numeric(key($x))) {
        $x = (object) $x;
    }
}

I did not try out solutions using array_walk_recursive()

Answer 5

You and many others have pointed to the JSON built-in functions, json_decode() and json_encode(). The method which you have mentioned works, but not completely: it won't convert indexed arrays to objects, and they will remain as indexed arrays. However, there is a trick to overcome this problem. You can use JSON_FORCE_OBJECT constant:

// Converts an array to an object recursively
$object = json_decode(json_encode($array, JSON_FORCE_OBJECT));

Tip: Also, as mentioned here, you can convert an object to array recursively using JSON functions:

// Converts an object to an array recursively
$array = json_decode(json_encode($object), true));    

Answer 6

public static function _arrayToObject($array) {
    $json = json_encode($array);
    $object = json_decode($json);
    return $object
}