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<?php $limit = 1; while ($limit === null || $limit--) { var_dump($limit); }
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 5
Branch analysis from position: 5
2 jumps found. (Code = 47) Position 1 = 7, Position 2 = 9
Branch analysis from position: 7
2 jumps found. (Code = 44) Position 1 = 10, Position 2 = 2
Branch analysis from position: 10
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 2
2 jumps found. (Code = 47) Position 1 = 7, Position 2 = 9
Branch analysis from position: 7
Branch analysis from position: 9
Branch analysis from position: 9
filename:       /in/99crn
function name:  (null)
number of ops:  11
compiled vars:  !0 = $limit
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 1
    5     1      > JMP                                                      ->5
    6     2    >   INIT_FCALL                                               'var_dump'
          3        SEND_VAR                                                 !0
          4        DO_ICALL                                                 
    5     5    >   TYPE_CHECK                                    2  ~3      !0
          6      > JMPNZ_EX                                         ~3      ~3, ->9
          7    >   POST_DEC                                         ~4      !0
          8        BOOL                                             ~3      ~4
          9    > > JMPNZ                                                    ~3, ->2
    7    10    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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191.65 ms | 1398 KiB | 15 Q