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<?php $attachments = [ [ "year" => 2018, "id" => 14689 ], [ "year" => 2017, "id" => 14690 ], [ "year" => 2018, "id" => 14688 ], [ "year" => 2018, "id" => 14687 ] ]; usort($attachments, function ($first, $second) { return $first["year"] < $second["year"]; }); print_r($attachments);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/cLGm6
function name:  (null)
number of ops:  10
compiled vars:  !0 = $attachments
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, <array>
   21     1        INIT_FCALL                                                   'usort'
          2        SEND_REF                                                     !0
          3        DECLARE_LAMBDA_FUNCTION                              ~2      [0]
   23     4        SEND_VAL                                                     ~2
   21     5        DO_ICALL                                                     
   25     6        INIT_FCALL                                                   'print_r'
          7        SEND_VAR                                                     !0
          8        DO_ICALL                                                     
          9      > RETURN                                                       1


Dynamic Functions:
Dynamic Function 0
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/cLGm6
function name:  {closure:/in/cLGm6:21}
number of ops:  7
compiled vars:  !0 = $first, !1 = $second
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   21     0  E >   RECV                                                 !0      
          1        RECV                                                 !1      
   22     2        FETCH_DIM_R                                          ~2      !0, 'year'
          3        FETCH_DIM_R                                          ~3      !1, 'year'
          4        IS_SMALLER                                           ~4      ~2, ~3
          5      > RETURN                                                       ~4
   23     6*     > RETURN                                                       null

End of Dynamic Function 0

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