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<?php $test = 'test'; echo $test; function foo($test) { $test = 'bar'; } foo($test); echo $test; ?>
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/3VqPI
function name:  (null)
number of ops:  7
compiled vars:  !0 = $test
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'test'
    3     1        ECHO                                                     !0
    7     2        INIT_FCALL                                               'foo'
          3        SEND_VAR                                                 !0
          4        DO_FCALL                                      0          
    8     5        ECHO                                                     !0
    9     6      > RETURN                                                   1

Function foo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/3VqPI
function name:  foo
number of ops:  3
compiled vars:  !0 = $test
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   RECV                                             !0      
    5     1        ASSIGN                                                   !0, 'bar'
    6     2      > RETURN                                                   null

End of function foo

Generated using Vulcan Logic Dumper, using php 8.0.0


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