How to remove the parent numeric keys of php array

Question

I've an array in php something like below

Array
(
    [0] => Array
        (
            [0] => 40173
            [1] => 514081
            [2] => 363885
            [3] => 891382
        ),
    [1] => Array
        (
            [0] => 40173
            [1] => 5181
            [2] => 385
            [3] => 891382
        )

)

Now I want to remove the parents indexes 0,1... and finally want to get all the values (only unique values).

Thanks.

raina77ow · Accepted Answer · 2014-03-21 11:39:15Z

6

One possible approach is using call_user_func_array('array_merge', $arr) idiom to flatten an array, then extracting unique values with array_unique():

$new_arr = array_unique(
  call_user_func_array('array_merge', $old_arr));

Demo. Obviously, it'll work with array of any length.

edited Mar 21, 2014 at 11:39

answered Mar 21, 2014 at 10:45

raina77ow

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Comments

Andre · Accepted Answer · 2014-03-21 11:29:23Z

3

$startArray = Array
(
[0] => Array
    (
        [0] => 40173
        [1] => 514081
        [2] => 363885
        [3] => 891382
    ),
[1] => Array
    (
        [0] => 40173
        [1] => 5181
        [2] => 385
        [3] => 891382
    )

);
//Edited to handle more the 2 subarrays
$finalArray = array();

foreach($startArray as $tmpArray){
    $finalArray = array_merge($finalArray, $tmpArray);
}

$finalArray = array_unique($finalArray);

edited Mar 21, 2014 at 11:29

answered Mar 21, 2014 at 10:43

Andre

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Comments

Community · Accepted Answer · 2020-06-20 09:12:55Z

1

Using RecursiveArrayIterator Class

$objarr = new RecursiveIteratorIterator(new RecursiveArrayIterator($yourarray));
foreach($objarr as $v) {
    $new_arr[]=$v;
}
print_r(array_unique($new_arr));

Demo

OUTPUT:

Array
(
    [0] => 40173
    [1] => 514081
    [2] => 363885
    [3] => 891382
    [5] => 5181
    [6] => 385
)

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Mar 21, 2014 at 13:06

Shankar Narayana Damodaran

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Comments

OfirH · Accepted Answer · 2014-03-21 10:42:00Z

0

$new_array = array_merge($array1, $array2);
$show_unique = array_unique($new_array);
print_r($show_unique);

array_merge is merging the array's, array_unique is removinge any duplicate values.

answered Mar 21, 2014 at 10:42

OfirH

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Comments

magnetronnie · Accepted Answer · 2014-03-21 10:43:20Z

-1

Try something like this:

$new_array = array();

foreach($big_array as $sub_array) {
    array_merge($new_array, $sub_array);
}

$new_array = array_unique($new_array);

(code not tested, this just a concept)

answered Mar 21, 2014 at 10:43

magnetronnie

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3 Comments

magnetronnie Over a year ago

Indeed, but the rest of the answer is, so what's the problem?

Alexei Levenkov Over a year ago

Good SO answer explains what is the problem and solution + shows code. Your one looks more like comment and there is no reason for person reading the "answer" to believe it will solve the problem. If you don't feel typing one sentence explaining your approach - just add your suggestion as comment.

magnetronnie Over a year ago

You can't add readable code to a comment. But of cource you're always welcome to edit and improve the answer, go ahead.

Anand Solanki · Accepted Answer · 2014-03-21 10:48:27Z

-1

Try this:

$Arr = array(array(40173, 514081, 363885, 891382),
             array(40173,5181, 385,891382));

$newArr = array();

foreach($Arr as $val1)
{

foreach($val1 as $val2)
{  
     array_push($newArr, $val2);
}
}

echo '<pre>';
print_r(array_unique($newArr));

Output:

Array
(
    [0] => 40173
    [1] => 514081
    [2] => 363885
    [3] => 891382
    [5] => 5181
    [6] => 385
)

Refer: https://eval.in/124240

-- Thanks

answered Mar 21, 2014 at 10:48

Anand Solanki

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