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<?php if ($res = oi()) { var_dump($res); } function oi() { return true; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 4, Position 2 = 7
Branch analysis from position: 4
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
filename:       /in/HrZcb
function name:  (null)
number of ops:  8
compiled vars:  !0 = $res
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   INIT_FCALL_BY_NAME                                       'oi'
          1        DO_FCALL                                      0  $1      
          2        ASSIGN                                           ~2      !0, $1
          3      > JMPZ                                                     ~2, ->7
    6     4    >   INIT_FCALL                                               'var_dump'
          5        SEND_VAR                                                 !0
          6        DO_ICALL                                                 
   12     7    > > RETURN                                                   1

Function oi:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/HrZcb
function name:  oi
number of ops:  2
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   11     0  E > > RETURN                                                   <true>
   12     1*     > RETURN                                                   null

End of function oi

Generated using Vulcan Logic Dumper, using php 8.0.0


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