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<?php function foo(){ var_dump(array_key_exists('test', $GLOBALS)); } function bar(){ global $test; var_dump(array_key_exists('test', get_defined_vars())); } foo(); bar(); foo();
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/X0tOk
function name:  (null)
number of ops:  7
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    6     0  E >   INIT_FCALL                                               'foo'
          1        DO_FCALL                                      0          
    7     2        INIT_FCALL                                               'bar'
          3        DO_FCALL                                      0          
    8     4        INIT_FCALL                                               'foo'
          5        DO_FCALL                                      0          
          6      > RETURN                                                   1

Function foo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/X0tOk
function name:  foo
number of ops:  6
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'var_dump'
          1        FETCH_GLOBALS                                    ~0      
          2        ARRAY_KEY_EXISTS                                 ~1      'test', ~0
          3        SEND_VAL                                                 ~1
          4        DO_ICALL                                                 
          5      > RETURN                                                   null

End of function foo

Function bar:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/X0tOk
function name:  bar
number of ops:  8
compiled vars:  !0 = $test
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   BIND_GLOBAL                                              !0, 'test'
          1        INIT_FCALL                                               'var_dump'
          2        INIT_FCALL                                               'get_defined_vars'
          3        DO_ICALL                                         $1      
          4        ARRAY_KEY_EXISTS                                 ~2      'test', $1
          5        SEND_VAL                                                 ~2
          6        DO_ICALL                                                 
          7      > RETURN                                                   null

End of function bar

Generated using Vulcan Logic Dumper, using php 8.0.0


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