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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)); $var = false; var_dump(empty($var));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/PaQYR
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        SEND_VAL                                                 ~2
          4        DO_ICALL                                                 
    5     5        ASSIGN                                                   !0, null
    6     6        INIT_FCALL                                               'var_dump'
          7        ISSET_ISEMPTY_CV                                 ~5      !0
          8        SEND_VAL                                                 ~5
          9        DO_ICALL                                                 
    7    10        ASSIGN                                                   !0, 1
    8    11        INIT_FCALL                                               'var_dump'
         12        ISSET_ISEMPTY_CV                                 ~8      !0
         13        SEND_VAL                                                 ~8
         14        DO_ICALL                                                 
    9    15        ASSIGN                                                   !0, 0
   10    16        INIT_FCALL                                               'var_dump'
         17        ISSET_ISEMPTY_CV                                 ~11     !0
         18        SEND_VAL                                                 ~11
         19        DO_ICALL                                                 
   11    20        ASSIGN                                                   !0, 'sa'
   12    21        INIT_FCALL                                               'var_dump'
         22        ISSET_ISEMPTY_CV                                 ~14     !0
         23        SEND_VAL                                                 ~14
         24        DO_ICALL                                                 
   13    25        ASSIGN                                                   !0, <false>
   14    26        INIT_FCALL                                               'var_dump'
         27        ISSET_ISEMPTY_CV                                 ~17     !0
         28        SEND_VAL                                                 ~17
         29        DO_ICALL                                                 
         30      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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