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<?php //method 1 $num = 1; echo "\n method 1: "; echo $num = (int) !$num; echo $num = (int) !$num; //method 2 $num = 1; echo "\n method 2: "; echo $num = array(1,0)[$num]; echo $num = array(1,0)[$num]; //method 3 $num = 1; echo "\n method 3: "; echo $num = (int) ($num < 1); echo $num = (int) ($num < 1); //method 4 $num = 1; echo "\n method 4: "; echo $num = (int)empty($num); echo $num = (int)empty($num); //method 4
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/lCvf3
function name:  (null)
number of ops:  39
compiled vars:  !0 = $num
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 1
    4     1        ECHO                                                     '%0A+method+1%3A+'
    5     2        BOOL_NOT                                         ~2      !0
          3        CAST                                          4  ~3      ~2
          4        ASSIGN                                           ~4      !0, ~3
          5        ECHO                                                     ~4
    6     6        BOOL_NOT                                         ~5      !0
          7        CAST                                          4  ~6      ~5
          8        ASSIGN                                           ~7      !0, ~6
          9        ECHO                                                     ~7
    9    10        ASSIGN                                                   !0, 1
   10    11        ECHO                                                     '%0A+method+2%3A+'
   11    12        FETCH_DIM_R                                      ~9      <array>, !0
         13        ASSIGN                                           ~10     !0, ~9
         14        ECHO                                                     ~10
   12    15        FETCH_DIM_R                                      ~11     <array>, !0
         16        ASSIGN                                           ~12     !0, ~11
         17        ECHO                                                     ~12
   15    18        ASSIGN                                                   !0, 1
   16    19        ECHO                                                     '%0A+method+3%3A+'
   17    20        IS_SMALLER                                       ~14     !0, 1
         21        CAST                                          4  ~15     ~14
         22        ASSIGN                                           ~16     !0, ~15
         23        ECHO                                                     ~16
   18    24        IS_SMALLER                                       ~17     !0, 1
         25        CAST                                          4  ~18     ~17
         26        ASSIGN                                           ~19     !0, ~18
         27        ECHO                                                     ~19
   21    28        ASSIGN                                                   !0, 1
   22    29        ECHO                                                     '%0A+method+4%3A+'
   23    30        ISSET_ISEMPTY_CV                                 ~21     !0
         31        CAST                                          4  ~22     ~21
         32        ASSIGN                                           ~23     !0, ~22
         33        ECHO                                                     ~23
   24    34        ISSET_ISEMPTY_CV                                 ~24     !0
         35        CAST                                          4  ~25     ~24
         36        ASSIGN                                           ~26     !0, ~25
         37        ECHO                                                     ~26
         38      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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