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  1. <?php
  2.  
  3. $array1 = array(
  4.     '2013-05-01'=>'test',
  5.     '2013-05-02'=>'testing',
  6.     '2013-05-03'=>'working',
  7.     '2013-05-04'=>'future test');
  8.  
  9. $array2 = array(
  10.     '2013-05-01'=>'1',
  11.     '2013-05-02'=>'done',
  12.     '2013-05-03'=>'code',
  13.     '2013-05-05'=>'release');
  14.  
  15.  
  16. $r = array_map(function($i) {
  17.     return !is_array($i) ? $i : implode(' ', $i);
  18. }, array_merge_recursive($array1, $array2));
  19.  
  20. var_dump($r);
Success #stdin #stdout 0.01s 20568KB
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array(5) {
  ["2013-05-01"]=>
  string(6) "test 1"
  ["2013-05-02"]=>
  string(12) "testing done"
  ["2013-05-03"]=>
  string(12) "working code"
  ["2013-05-04"]=>
  string(11) "future test"
  ["2013-05-05"]=>
  string(7) "release"
}
https://ideone.com/wmbple
language:
PHP (php 7.3.5)
created:
11 years ago
visibility:
public

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