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<?php $arr1 = [2, 1, 2, 5, 7, 1, 9, 3, 6, 8, 8]; $arr2 = [2, 1, 8, 3]; $priority = array_flip($arr2); $fallback = count($arr2); usort( $arr1, fn($a, $b) => [$priority[$a] ?? $fallback, $a] <=> [$priority[$b] ?? $fallback, $b] ); var_export($arr1);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/MrukZ
function name:  (null)
number of ops:  19
compiled vars:  !0 = $arr1, !1 = $arr2, !2 = $priority, !3 = $fallback
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        ASSIGN                                                   !1, <array>
    6     2        INIT_FCALL                                               'array_flip'
          3        SEND_VAR                                                 !1
          4        DO_ICALL                                         $6      
          5        ASSIGN                                                   !2, $6
    7     6        COUNT                                            ~8      !1
          7        ASSIGN                                                   !3, ~8
    9     8        INIT_FCALL                                               'usort'
   10     9        SEND_REF                                                 !0
   11    10        DECLARE_LAMBDA_FUNCTION                          ~10     [0]
         11        BIND_LEXICAL                                             ~10, !2
         12        BIND_LEXICAL                                             ~10, !3
   15    13        SEND_VAL                                                 ~10
    9    14        DO_ICALL                                                 
   16    15        INIT_FCALL                                               'var_export'
         16        SEND_VAR                                                 !0
         17        DO_ICALL                                                 
         18      > 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/MrukZ
function name:  {closure}
number of ops:  17
compiled vars:  !0 = $a, !1 = $b, !2 = $priority, !3 = $fallback
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   11     0  E >   RECV                                             !0      
          1        RECV                                             !1      
          2        BIND_STATIC                                              !2
          3        BIND_STATIC                                              !3
   12     4        FETCH_DIM_IS                                     ~4      !2, !0
          5        COALESCE                                         ~5      ~4
          6        QM_ASSIGN                                        ~5      !3
          7        INIT_ARRAY                                       ~6      ~5
          8        ADD_ARRAY_ELEMENT                                ~6      !0
   14     9        FETCH_DIM_IS                                     ~7      !2, !1
         10        COALESCE                                         ~8      ~7
         11        QM_ASSIGN                                        ~8      !3
         12        INIT_ARRAY                                       ~9      ~8
         13        ADD_ARRAY_ELEMENT                                ~9      !1
         14        SPACESHIP                                        ~10     ~6, ~9
         15      > RETURN                                                   ~10
   15    16*     > RETURN                                                   null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.0.0


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