PHP array_unique is not returning unique values

Question

I have an array below in which I want to get or remove duplicate values:

$data = $responses;
var_dump($data);

result is:

array(11) {
  [0]=>
    string(4) "date"
  [1]=>
     string(4) "name"
  [2]=>
     string(10) "start_time"
  [3]=>
     string(8) "end_time"
  [4]=>
     string(4) "date"
  [5]=>
     string(4) "name"
  [6]=>
     string(10) "start_time"
  [7]=>
     string(8) "end_time"
  [8]=>
     string(7) "other_1"
  [9]=>
     string(7) "other_2"
  [10]=>
     string(7) "other_3"
}

So I do :

var_dump(array_unique($data));
//also tried:
var_dump(array_intersect_key($data, array_unique(array_map('serialize', $data))));

but the output is:

array(6) {
  [0]=>
    string(4) "date"
  [1]=>
     string(4) "name"
  [2]=>
     string(10) "start_time"
  [3]=>
     string(8) "end_time"
  [4]=>
     string(7) "other_1"
  [5]=>
     string(7) "other_2"
  [6]=>
     string(7) "other_3"
}

The output I am expecting is:

array(3){
  [1]=>
     string(7) "other_1"
  [2]=>
     string(7) "other_2"
  [3]=>
     string(7) "other_3"
}

I am expecting to have the last 3 items to be returned only for they are the only values that are not duplicate, but I think array_unique is just retaining one single value of the duplicate items. Am I doing array_unique the right way?

@mickmackusa thanks for the redirection, but the output is like this : `array ( 0 => 'other_1', 1 => 'other_2', 2 => 'other_3', )NULL` . can we remove NULL? — Eem Jee, Dec 14 '18 at 03:43
If you need the keys to start from `1`, then use `array_unshift()` a dummy value to the array, then `unset()` it. If my other answer helped you, you may upvote it. — mickmackusa, Dec 14 '18 at 03:45
@mickmackusa I have just copied the code from your answer on that link :) — Eem Jee, Dec 14 '18 at 03:49
I am suggesting that it is something else in your code that is generating NULL (beyond my snippet). — mickmackusa, Dec 14 '18 at 03:49
@mickmackusa Okay. I have sorted it out. Can we store this one to an array? I have tried typecasting it, but doesn't work. — Eem Jee, Dec 14 '18 at 03:59
I don't understand your question extension. You can show me in a 3v4l link and I can review your attempt if you like. Are you asking how to push it into another array? You may accept the duplicate that I have provided. — mickmackusa, Dec 14 '18 at 03:59
@mickmackusa Yes, I want them to be an array, or create the result to an array. — Eem Jee, Dec 14 '18 at 05:19
The result is an array (with 3 elements in it). You'll need to better describe what you desire. — mickmackusa, Dec 14 '18 at 05:24

PHP array_unique is not returning unique values

0 Answers0