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  1. <?php
  2. $arr1 = ['data'=>[1, 2, 3]];
  3. $arr2 = ['data'=>[4, 5, 6]];
  4.  
  5. $merge = array_merge($arr1['data'], $arr2['data']);
  6. var_dump($merge);
Success #stdin #stdout 0.02s 26192KB
stdin
Standard input is empty
stdout
array(6) {
  [0]=>
  int(1)
  [1]=>
  int(2)
  [2]=>
  int(3)
  [3]=>
  int(4)
  [4]=>
  int(5)
  [5]=>
  int(6)
}