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<?php $pens = 'words'; function pencils() { global $pens; $pens = null; } function puppies() { global $pens; var_dump( isset( $pens ) ); } pencils(); puppies();
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/BZau4
function name:  (null)
number of ops:  6
compiled vars:  !0 = $pens
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, 'words'
   15     1        INIT_FCALL                                                   'pencils'
          2        DO_FCALL                                          0          
   16     3        INIT_FCALL                                                   'puppies'
          4        DO_FCALL                                          0          
          5      > RETURN                                                       1

Function pencils:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/BZau4
function name:  pencils
number of ops:  3
compiled vars:  !0 = $pens
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    6     0  E >   BIND_GLOBAL                                                  !0, 'pens'
    7     1        ASSIGN                                                       !0, null
    8     2      > RETURN                                                       null

End of function pencils

Function puppies:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/BZau4
function name:  puppies
number of ops:  6
compiled vars:  !0 = $pens
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   11     0  E >   BIND_GLOBAL                                                  !0, 'pens'
   12     1        INIT_FCALL                                                   'var_dump'
          2        ISSET_ISEMPTY_CV                                     ~1      !0
          3        SEND_VAL                                                     ~1
          4        DO_ICALL                                                     
   13     5      > RETURN                                                       null

End of function puppies

Generated using Vulcan Logic Dumper, using php 8.5.0


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