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<?php ${" "} = "blank space"; ${"123"} = 456; var_dump(${" "},${"123"}); $a = get_defined_vars(); echo array_key_exists(" ",$a)? "Yes" : "No","\n"; echo array_key_exists("123",$a)? "Yes" : "No";
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 11, Position 2 = 13
Branch analysis from position: 11
1 jumps found. (Code = 42) Position 1 = 14
Branch analysis from position: 14
2 jumps found. (Code = 43) Position 1 = 18, Position 2 = 20
Branch analysis from position: 18
1 jumps found. (Code = 42) Position 1 = 21
Branch analysis from position: 21
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 20
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 13
2 jumps found. (Code = 43) Position 1 = 18, Position 2 = 20
Branch analysis from position: 18
Branch analysis from position: 20
filename:       /in/a3qNp
function name:  (null)
number of ops:  23
compiled vars:  !0 = $ , !1 = $123, !2 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'blank+space'
    4     1        ASSIGN                                                   !1, 456
    5     2        INIT_FCALL                                               'var_dump'
          3        SEND_VAR                                                 !0
          4        SEND_VAR                                                 !1
          5        DO_ICALL                                                 
    6     6        INIT_FCALL                                               'get_defined_vars'
          7        DO_ICALL                                         $6      
          8        ASSIGN                                                   !2, $6
    7     9        ARRAY_KEY_EXISTS                                         '+', !2
         10      > JMPZ                                                     ~8, ->13
         11    >   QM_ASSIGN                                        ~9      'Yes'
         12      > JMP                                                      ->14
         13    >   QM_ASSIGN                                        ~9      'No'
         14    >   ECHO                                                     ~9
         15        ECHO                                                     '%0A'
    8    16        ARRAY_KEY_EXISTS                                         '123', !2
         17      > JMPZ                                                     ~10, ->20
         18    >   QM_ASSIGN                                        ~11     'Yes'
         19      > JMP                                                      ->21
         20    >   QM_ASSIGN                                        ~11     'No'
         21    >   ECHO                                                     ~11
         22      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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