How can I make a nested array tree into an nested object tree?

Question

Here is my code:

$adjacencies = array (  "0" => array(   "name1" => "pear",
                                        "name2" => "jack",
                                        "data" => array()   ),
                        "1" => array(   "name1" => "pear",
                                        "name2" => "john",
                                        "data" => array()   )
                    );

$final_array['adjacencies'] = $adjacencies;
echo "<pre>";
print_r(json_encode($final_array));

And this is the result of code above:

As you see data's value is [], while I want this {} instead. How can I do that?

Possible duplicate of Best way to create an empty object in JSON with PHP? — Clive
– Clive, Commented Jan 29, 2017 at 12:39

Ofir Baruch · Accepted Answer · 2017-01-29 12:54:47Z

2

While I'm not sure what's the reason behind your question, instead of setting the data key as an array, simply define it as a new object.

$adjacencies = array (  "0" => array(   "name1" => "pear",
                                        "name2" => "jack",
                                        "data" => new stdClass()   ),
                        "1" => array(   "name1" => "pear",
                                        "name2" => "john",
                                        "data" => new stdClass()   )
                    );

$final_array['adjacencies'] = $adjacencies;
echo "<pre>";
print_r(json_encode($final_array));

Source:

http://php.net/manual/en/language.types.object.php#107071

answered Jan 29, 2017 at 12:54

Ofir Baruch

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Boris D. Teoharov · Accepted Answer · 2017-01-29 12:42:38Z

1

You could use ArrayObject if it suits you (or stdClass).

PHP Manual for ArrayObject

For example:

php > echo json_encode([[],[]]);
[[],[]]
php > echo json_encode([ new ArrayObject(), new ArrayObject()]);
[{},{}]

answered Jan 29, 2017 at 12:42

Boris D. Teoharov

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