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<?php function doit($v) { switch ($v) { case 0: echo "zero\n"; break; case null: echo "null\n"; break; case false: echo "false\n"; break; case '': echo "''\n"; break; } } foreach ([0, null, false, ''] as $v) doit($v);
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 1, Position 2 = 6
Branch analysis from position: 1
2 jumps found. (Code = 78) Position 1 = 2, Position 2 = 6
Branch analysis from position: 2
1 jumps found. (Code = 42) Position 1 = 1
Branch analysis from position: 1
Branch analysis from position: 6
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 6
filename:       /in/JEWCm
function name:  (null)
number of ops:  8
compiled vars:  !0 = $v
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   12     0  E > > FE_RESET_R                                       $1      <array>, ->6
          1    > > FE_FETCH_R                                               $1, !0, ->6
          2    >   INIT_FCALL                                               'doit'
          3        SEND_VAR                                                 !0
          4        DO_FCALL                                      0          
          5      > JMP                                                      ->1
          6    >   FE_FREE                                                  $1
          7      > RETURN                                                   1

Function doit:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 44) Position 1 = 3, Position 2 = 10
Branch analysis from position: 3
2 jumps found. (Code = 44) Position 1 = 5, Position 2 = 12
Branch analysis from position: 5
2 jumps found. (Code = 44) Position 1 = 7, Position 2 = 14
Branch analysis from position: 7
2 jumps found. (Code = 44) Position 1 = 9, Position 2 = 16
Branch analysis from position: 9
1 jumps found. (Code = 42) Position 1 = 18
Branch analysis from position: 18
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 16
1 jumps found. (Code = 42) Position 1 = 18
Branch analysis from position: 18
Branch analysis from position: 14
1 jumps found. (Code = 42) Position 1 = 18
Branch analysis from position: 18
Branch analysis from position: 12
1 jumps found. (Code = 42) Position 1 = 18
Branch analysis from position: 18
Branch analysis from position: 10
1 jumps found. (Code = 42) Position 1 = 18
Branch analysis from position: 18
filename:       /in/JEWCm
function name:  doit
number of ops:  19
compiled vars:  !0 = $v
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
    5     1        IS_EQUAL                                                 !0, 0
          2      > JMPNZ                                                    ~1, ->10
    4     3    >   IS_EQUAL                                                 !0, null
          4      > JMPNZ                                                    ~1, ->12
    7     5    >   IS_EQUAL                                                 !0, <false>
          6      > JMPNZ                                                    ~1, ->14
    8     7    >   IS_EQUAL                                                 !0, ''
          8      > JMPNZ                                                    ~1, ->16
          9    > > JMP                                                      ->18
    5    10    >   ECHO                                                     'zero%0A'
         11      > JMP                                                      ->18
    6    12    >   ECHO                                                     'null%0A'
         13      > JMP                                                      ->18
    7    14    >   ECHO                                                     'false%0A'
         15      > JMP                                                      ->18
    8    16    >   ECHO                                                     '%27%27%0A'
         17      > JMP                                                      ->18
   10    18    > > RETURN                                                   null

End of function doit

Generated using Vulcan Logic Dumper, using php 8.0.0


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