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<?php $objects = [ (object)["name" => "Name1", "key" => "key1"], (object)["name" => "Name2", "key" => "key2"], (object)["name" => "Name3", "key" => "key3"], ]; $keys = ["key3", "key1"]; $lookup = array_flip($keys); $fallback = count($keys); usort($objects, function($a, $b) use ($lookup, $fallback) { return ($lookup[$a->key] ?? $fallback) <=> ($lookup[$b->key] ?? $fallback); }); var_export($objects);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/pFaHH
function name:  (null)
number of ops:  25
compiled vars:  !0 = $objects, !1 = $keys, !2 = $lookup, !3 = $fallback
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   CAST                                          8  ~4      <array>
          1        INIT_ARRAY                                       ~5      ~4
    5     2        CAST                                          8  ~6      <array>
          3        ADD_ARRAY_ELEMENT                                ~5      ~6
    6     4        CAST                                          8  ~7      <array>
          5        ADD_ARRAY_ELEMENT                                ~5      ~7
    3     6        ASSIGN                                                   !0, ~5
    9     7        ASSIGN                                                   !1, <array>
   10     8        INIT_FCALL                                               'array_flip'
          9        SEND_VAR                                                 !1
         10        DO_ICALL                                         $10     
         11        ASSIGN                                                   !2, $10
   11    12        COUNT                                            ~12     !1
         13        ASSIGN                                                   !3, ~12
   13    14        INIT_FCALL                                               'usort'
         15        SEND_REF                                                 !0
         16        DECLARE_LAMBDA_FUNCTION                          ~14     [0]
         17        BIND_LEXICAL                                             ~14, !2
         18        BIND_LEXICAL                                             ~14, !3
   15    19        SEND_VAL                                                 ~14
   13    20        DO_ICALL                                                 
   17    21        INIT_FCALL                                               'var_export'
         22        SEND_VAR                                                 !0
         23        DO_ICALL                                                 
         24      > 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/pFaHH
function name:  {closure}
number of ops:  15
compiled vars:  !0 = $a, !1 = $b, !2 = $lookup, !3 = $fallback
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   13     0  E >   RECV                                             !0      
          1        RECV                                             !1      
          2        BIND_STATIC                                              !2
          3        BIND_STATIC                                              !3
   14     4        FETCH_OBJ_R                                      ~4      !0, 'key'
          5        FETCH_DIM_IS                                     ~5      !2, ~4
          6        COALESCE                                         ~6      ~5
          7        QM_ASSIGN                                        ~6      !3
          8        FETCH_OBJ_R                                      ~7      !1, 'key'
          9        FETCH_DIM_IS                                     ~8      !2, ~7
         10        COALESCE                                         ~9      ~8
         11        QM_ASSIGN                                        ~9      !3
         12        SPACESHIP                                        ~10     ~6, ~9
         13      > RETURN                                                   ~10
   15    14*     > RETURN                                                   null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.0.0


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