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  1. <?php
  2.  
  3. $array1 = [
  4. '1' => 285.52,
  5. '2' => 427.76
  6. ];
  7.  
  8. $array2 = [
  9. '1' => 123.44,
  10. '2' => 48.32
  11. ];
  12.  
  13. foreach($array1 as $key => $val) {
  14. $mergedArrays[$key] = array('owed' => $val, 'payed' => $array2[$key]);
  15. }
  16.  
  17. print_r($mergedArrays);
Success #stdin #stdout 0s 52488KB
stdin
Standard input is empty
stdout
Array
(
    [1] => Array
        (
            [owed] => 285.52
            [payed] => 123.44
        )

    [2] => Array
        (
            [owed] => 427.76
            [payed] => 48.32
        )

)