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<?php function array_flip_keys($array, $x, $y) { if(array_key_exists($x, $array) && array_key_exists($y, $array)) { $result = []; foreach($array as $key=>$value) { switch($key) { case $x: $result[$y]=$array[$y]; continue; case $y: $result[$x]=$array[$x]; continue; default: $result[$key]=$value; } } return $result; } return $array; } $array = ['foo', 'bar', 'baz', 'feo']; var_dump(array_flip_keys($array, 1, 3));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/9jK8Q
function name:  (null)
number of ops:  10
compiled vars:  !0 = $array
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   27     0  E >   ASSIGN                                                   !0, <array>
   29     1        INIT_FCALL                                               'var_dump'
          2        INIT_FCALL                                               'array_flip_keys'
          3        SEND_VAR                                                 !0
          4        SEND_VAL                                                 1
          5        SEND_VAL                                                 3
          6        DO_FCALL                                      0  $2      
          7        SEND_VAR                                                 $2
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Function array_flip_keys:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 46) Position 1 = 5, Position 2 = 7
Branch analysis from position: 5
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 30
Branch analysis from position: 8
2 jumps found. (Code = 77) Position 1 = 10, Position 2 = 28
Branch analysis from position: 10
2 jumps found. (Code = 78) Position 1 = 11, Position 2 = 28
Branch analysis from position: 11
2 jumps found. (Code = 44) Position 1 = 14, Position 2 = 17
Branch analysis from position: 14
2 jumps found. (Code = 44) Position 1 = 16, Position 2 = 21
Branch analysis from position: 16
1 jumps found. (Code = 42) Position 1 = 25
Branch analysis from position: 25
1 jumps found. (Code = 42) Position 1 = 10
Branch analysis from position: 10
Branch analysis from position: 21
1 jumps found. (Code = 42) Position 1 = 27
Branch analysis from position: 27
Branch analysis from position: 17
1 jumps found. (Code = 42) Position 1 = 27
Branch analysis from position: 27
Branch analysis from position: 28
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 28
Branch analysis from position: 30
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
filename:       /in/9jK8Q
function name:  array_flip_keys
number of ops:  32
compiled vars:  !0 = $array, !1 = $x, !2 = $y, !3 = $result, !4 = $value, !5 = $key
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
          1        RECV                                             !1      
          2        RECV                                             !2      
    5     3        ARRAY_KEY_EXISTS                                 ~6      !1, !0
          4      > JMPZ_EX                                          ~6      ~6, ->7
          5    >   ARRAY_KEY_EXISTS                                 ~7      !2, !0
          6        BOOL                                             ~6      ~7
          7    > > JMPZ                                                     ~6, ->30
    7     8    >   ASSIGN                                                   !3, <array>
    8     9      > FE_RESET_R                                       $9      !0, ->28
         10    > > FE_FETCH_R                                       ~10     $9, !4, ->28
         11    >   ASSIGN                                                   !5, ~10
   12    12        IS_EQUAL                                                 !5, !1
         13      > JMPNZ                                                    ~12, ->17
   15    14    >   IS_EQUAL                                                 !5, !2
         15      > JMPNZ                                                    ~12, ->21
         16    > > JMP                                                      ->25
   13    17    >   FETCH_DIM_R                                      ~14     !0, !2
         18        ASSIGN_DIM                                               !3, !2
         19        OP_DATA                                                  ~14
   14    20      > JMP                                                      ->27
   16    21    >   FETCH_DIM_R                                      ~16     !0, !1
         22        ASSIGN_DIM                                               !3, !1
         23        OP_DATA                                                  ~16
   17    24      > JMP                                                      ->27
   19    25    >   ASSIGN_DIM                                               !3, !5
         26        OP_DATA                                                  !4
    8    27    > > JMP                                                      ->10
         28    >   FE_FREE                                                  $9
   22    29      > RETURN                                                   !3
   24    30    > > RETURN                                                   !0
   25    31*     > RETURN                                                   null

End of function array_flip_keys

Generated using Vulcan Logic Dumper, using php 8.0.0


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