array_unique outputs null while sorting array

Question

I have this array (decoded from JSON, output with print_r):

stdClass Object
(
    [data] => Array
        (
            [0] => stdClass Object
                (
                    [item] => te
                    [date] => 13.10
                )
            [1] => stdClass Object
                (
                    [item] => te
                    [date] => 13.10
                )
            [2] => stdClass Object
                (
                    [item] => tr
                    [date] => 13.10
                )
        )
)

But now I have to remove all the duplicates. If I try $result = array_unique($array, SORT_REGULAR); $result is null.

Can someone spot my mistake?

this is a standard object not an array, convert it in the array first — RAUSHAN KUMAR
– RAUSHAN KUMAR, Commented Oct 13, 2017 at 13:50

SamHecquet · Accepted Answer · 2017-10-13 18:52:03Z

3

This is a stdClass object, not an array. When you decode by using the function json_decode, you need to pass the parameter "true" to have an array:

$array = json_decode($json, true);

Edit: As people noticed in the comments, the actual array exists in $array['data'], so the array_unique must be applied on $array['data'] instead of $array.

edited Oct 13, 2017 at 18:52

answered Oct 13, 2017 at 13:53

SamHecquet

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4 Comments

trincot Over a year ago

Maybe also add that after that the array_unique must be applied on $array["data"] instead of $array.

RAUSHAN KUMAR Over a year ago

@trincot yeah, correct. the actual array exist in $array['data']. please update the answer

Francis Over a year ago

So, with the true parameter I can see the sorted array. But how can I get it back to original JSON with the data array?

SamHecquet Over a year ago

@Francis You can use the json_encode function: php.net/manual/en/function.json-encode.php

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