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<?php $array = [ ['id' => 7867867, 'animal' => 'Dog'], ['id' => 3452342, 'animal' => 'Lion'], ['id' => 1231233, 'animal' => 'Lion'], ['id' => 5867867, 'animal' => 'Dog'], ['id' => 1111111, 'animal' => 'Zeebra'], ['id' => 2222222, 'animal' => 'Cat'], ['id' => 3333333, 'animal' => 'Cat'], ['id' => 4444444, 'animal' => 'Zeebra'] ]; $priorities = array_flip(['Lion', 'Dog', 'Zeebra', 'Cat']); usort($array, fn($a, $b) => $priorities[$a['animal']] <=> $priorities[$b['animal']]); var_export($array);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/tQru6
function name:  (null)
number of ops:  15
compiled vars:  !0 = $array, !1 = $priorities
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
   13     1        INIT_FCALL                                               'array_flip'
          2        SEND_VAL                                                 <array>
          3        DO_ICALL                                         $3      
          4        ASSIGN                                                   !1, $3
   15     5        INIT_FCALL                                               'usort'
          6        SEND_REF                                                 !0
          7        DECLARE_LAMBDA_FUNCTION                          ~5      [0]
          8        BIND_LEXICAL                                             ~5, !1
          9        SEND_VAL                                                 ~5
         10        DO_ICALL                                                 
   17    11        INIT_FCALL                                               'var_export'
         12        SEND_VAR                                                 !0
         13        DO_ICALL                                                 
         14      > 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/tQru6
function name:  {closure}
number of ops:  10
compiled vars:  !0 = $a, !1 = $b, !2 = $priorities
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   15     0  E >   RECV                                             !0      
          1        RECV                                             !1      
          2        BIND_STATIC                                              !2
          3        FETCH_DIM_R                                      ~3      !0, 'animal'
          4        FETCH_DIM_R                                      ~4      !2, ~3
          5        FETCH_DIM_R                                      ~5      !1, 'animal'
          6        FETCH_DIM_R                                      ~6      !2, ~5
          7        SPACESHIP                                        ~7      ~4, ~6
          8      > RETURN                                                   ~7
          9*     > RETURN                                                   null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.0.0


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