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<?php $arr = [ [ 20190529 => [ 30 => [ 17 => [ 3846 => 0, ], ], ], ], [ 20190516 => [ 31 => [ 17 => [ 512 => 0, ], ], ], ], ]; $keys = []; foreach($arr as $k => $item){ $keys[] = key($item); } array_multisort($keys, SORT_NATURAL, $arr); print_r($arr);die;
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 3, Position 2 = 11
Branch analysis from position: 3
2 jumps found. (Code = 78) Position 1 = 4, Position 2 = 11
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 3
Branch analysis from position: 3
Branch analysis from position: 11
1 jumps found. (Code = 79) Position 1 = -2
Branch analysis from position: 11
filename:       /in/Koejc
function name:  (null)
number of ops:  22
compiled vars:  !0 = $arr, !1 = $keys, !2 = $item, !3 = $k
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
   28     1        ASSIGN                                                   !1, <array>
   29     2      > FE_RESET_R                                       $6      !0, ->11
          3    > > FE_FETCH_R                                       ~7      $6, !2, ->11
          4    >   ASSIGN                                                   !3, ~7
   30     5        INIT_FCALL                                               'key'
          6        SEND_VAR                                                 !2
          7        DO_ICALL                                         $10     
          8        ASSIGN_DIM                                               !1
          9        OP_DATA                                                  $10
   29    10      > JMP                                                      ->3
         11    >   FE_FREE                                                  $6
   32    12        INIT_FCALL                                               'array_multisort'
         13        SEND_REF                                                 !1
         14        SEND_VAL                                                 6
         15        SEND_REF                                                 !0
         16        DO_ICALL                                                 
   33    17        INIT_FCALL                                               'print_r'
         18        SEND_VAR                                                 !0
         19        DO_ICALL                                                 
         20      > EXIT                                                     
   34    21*     > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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