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<?php $array = array( (object)array( 'first_name' => 'Léa', 'last_name' => 'Weber', ), (object)array( 'first_name' => 'Alexandre', 'last_name' => 'Dupont', ), (object)array( 'first_name' => 'Léa', 'last_name' => 'Zotal', ), (object)array( 'first_name' => 'Jérémie', 'last_name' => 'Hoffmann', ) ); usort($array, function($a, $b) { return [$a->last_name, $a->first_name] <=> [$b->last_name, $b->first_name]; }); var_export($array);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/7NiNb
function name:  (null)
number of ops:  18
compiled vars:  !0 = $array
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    5     0  E >   CAST                                              8  ~1      <array>
          1        INIT_ARRAY                                           ~2      ~1
          2        CAST                                              8  ~3      <array>
          3        ADD_ARRAY_ELEMENT                                    ~2      ~3
          4        CAST                                              8  ~4      <array>
          5        ADD_ARRAY_ELEMENT                                    ~2      ~4
          6        CAST                                              8  ~5      <array>
          7        ADD_ARRAY_ELEMENT                                    ~2      ~5
    3     8        ASSIGN                                                       !0, ~2
   22     9        INIT_FCALL                                                   'usort'
         10        SEND_REF                                                     !0
         11        DECLARE_LAMBDA_FUNCTION                              ~7      [0]
   26    12        SEND_VAL                                                     ~7
   22    13        DO_ICALL                                                     
   29    14        INIT_FCALL                                                   'var_export'
         15        SEND_VAR                                                     !0
         16        DO_ICALL                                                     
         17      > 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/7NiNb
function name:  {closure:/in/7NiNb:22}
number of ops:  13
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   22     0  E >   RECV                                                 !0      
          1        RECV                                                 !1      
   23     2        FETCH_OBJ_R                                          ~2      !0, 'last_name'
          3        INIT_ARRAY                                           ~3      ~2
          4        FETCH_OBJ_R                                          ~4      !0, 'first_name'
          5        ADD_ARRAY_ELEMENT                                    ~3      ~4
   25     6        FETCH_OBJ_R                                          ~5      !1, 'last_name'
          7        INIT_ARRAY                                           ~6      ~5
          8        FETCH_OBJ_R                                          ~7      !1, 'first_name'
          9        ADD_ARRAY_ELEMENT                                    ~6      ~7
         10        SPACESHIP                                            ~8      ~3, ~6
         11      > RETURN                                                       ~8
   26    12*     > RETURN                                                       null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.5.0


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