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<?php $var = 'sa'; var_dump(!empty($var)); $var = null; var_dump(!empty($var)); $var = 1; var_dump(!empty($var)); $var = 0; var_dump(!empty($var)); $var = "sa"; var_dump(!empty($var));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/oEJHX
function name:  (null)
number of ops:  31
compiled vars:  !0 = $var
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'sa'
    4     1        INIT_FCALL                                               'var_dump'
          2        ISSET_ISEMPTY_CV                                 ~2      !0
          3        BOOL_NOT                                         ~3      ~2
          4        SEND_VAL                                                 ~3
          5        DO_ICALL                                                 
    5     6        ASSIGN                                                   !0, null
    6     7        INIT_FCALL                                               'var_dump'
          8        ISSET_ISEMPTY_CV                                 ~6      !0
          9        BOOL_NOT                                         ~7      ~6
         10        SEND_VAL                                                 ~7
         11        DO_ICALL                                                 
    7    12        ASSIGN                                                   !0, 1
    8    13        INIT_FCALL                                               'var_dump'
         14        ISSET_ISEMPTY_CV                                 ~10     !0
         15        BOOL_NOT                                         ~11     ~10
         16        SEND_VAL                                                 ~11
         17        DO_ICALL                                                 
    9    18        ASSIGN                                                   !0, 0
   10    19        INIT_FCALL                                               'var_dump'
         20        ISSET_ISEMPTY_CV                                 ~14     !0
         21        BOOL_NOT                                         ~15     ~14
         22        SEND_VAL                                                 ~15
         23        DO_ICALL                                                 
   11    24        ASSIGN                                                   !0, 'sa'
   12    25        INIT_FCALL                                               'var_dump'
         26        ISSET_ISEMPTY_CV                                 ~18     !0
         27        BOOL_NOT                                         ~19     ~18
         28        SEND_VAL                                                 ~19
         29        DO_ICALL                                                 
         30      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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