PHP remove element from array issue

Question

I am doing with Laravel 5. And the problem I am facing is that I have an array in session and now I want to remove a single element from that array and for the sake I am using array_diff function.

When I get array from session it's in the form like:

["4","5","6"]

But when I try to remove element '5' from array it deforms the array and the result then is:

{"0":"4","2":"6"}

My code is:

array_diff($arr, array(5))

The result is same with unset([$index]) also.

The real code:

Session::push('compare.products', $id); 
$compare = Session::get('compare'); 
if(($key = array_search($id, $compare['products'])) !== false) {   
    unset($compare['products'][$key]);
    return $compare['products']; 
}

When you use: unset($index[1]); it return {"0":"4","2":"6"}?? — , Apr 09 '15 at 09:09
Cannot reproduce, you need to post your exact code / a working example: http://ideone.com/ZG6pCi — jeroen, Apr 09 '15 at 09:10
http://php.net/manual/en/function.array-diff.php read that. Array diff is used as the method name says: to calculate the DIFFerence between 2 arrays. — Mike M., Apr 09 '15 at 09:12
Session::push('compare.products', $id); $compare = Session::get('compare'); if(($key = array_search($id, $compare['products'])) !== false) { unset($compare['products'][$key]); return $compare['products']; } — Ali Shahzad, Apr 09 '15 at 09:14
The result is fine to be honest but it's json, it states index 0= 4, index 2= 6 — Mike M., Apr 09 '15 at 09:16
I posted your code comment as an edit to the question. I assume its the real code you are using — RiggsFolly, Apr 09 '15 at 09:19
@MikeM. Except it has converted it to a JSON Object. I dont think the questioner is telling us the complete facts here. — RiggsFolly, Apr 09 '15 at 09:21
It's neither unset([$index]); it is: unset($arrayVAR[Index_here]); — Mike M., Apr 09 '15 at 10:47

score 0 · Answer 1 · edited May 23 '17 at 10:24

0

If you want to keep correct indexes you have to call array_values after the unset.

In your case, it will be :

Session::push('compare.products', $id); 
$compare = Session::get('compare'); 
if(($key = array_search($id, $compare['products'])) !== false) {   
    unset($compare['products'][$key]);
    return array_values($compare['products']); 
}

In a general case, it's :

$array = array(0, 1, 2, 3);

unset($array[2]);

$array = array_values($array);
var_dump($array);
/* array(3) {
  [0]=>
     int(0)
  [1]=>
     int(1)
  [2]=>
     int(3)
} */

https://stackoverflow.com/a/369761/4682796

edited May 23 '17 at 10:24

Community

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answered Apr 09 '15 at 09:12

jmgross

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How exactly does this answer the question? – jeroen Apr 09 '15 at 09:15
`{"0":"4","2":"6"}` seems to be a kind of var_dump like `["0"=>"4","2"=>"6"]`. And when he says _it deforms the array_ I was thinking that my answer solves the issue with a correct indexed array – jmgross Apr 09 '15 at 09:18
I didn't noticed that it was a JSON output... I was too much focus on PHP directly... Thk ^^ – jmgross Apr 09 '15 at 09:26

PHP remove element from array issue

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