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  1. <?php
  2.  
  3. $array1 = ["d8ab80f4f6"=>[2,3,5,7], '9087785727'=>[1,2,7,8]]; 
  4. $array2 = ["d8ab80f4f6"=>[2,3], '9087785727'=>[1,2]]; 
  5.  
  6. foreach ($array1 as $key => &$value) {
  7.     $value = array_merge($value, $array2[$key]);
  8. }
  9. var_dump($array1);
Success #stdin #stdout 0.04s 24480KB
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Standard input is empty
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array(2) {
  ["d8ab80f4f6"]=>
  array(6) {
    [0]=>
    int(2)
    [1]=>
    int(3)
    [2]=>
    int(5)
    [3]=>
    int(7)
    [4]=>
    int(2)
    [5]=>
    int(3)
  }
  [9087785727]=>
  &array(6) {
    [0]=>
    int(1)
    [1]=>
    int(2)
    [2]=>
    int(7)
    [3]=>
    int(8)
    [4]=>
    int(1)
    [5]=>
    int(2)
  }
}
https://ideone.com/XX44M6
language:
PHP (php 7.3.5)
created:
5 years ago
visibility:
public

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