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<?php function &test($a){ return $a+1; } $t=2; var_dump(test($t));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/S6bLQ
function name:  (null)
number of ops:  8
compiled vars:  !0 = $t
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   ASSIGN                                                   !0, 2
    6     1        INIT_FCALL                                               'var_dump'
          2        INIT_FCALL                                               'test'
          3        SEND_VAR                                                 !0
          4        DO_FCALL                                      0  $2      
          5        SEND_VAR                                                 $2
          6        DO_ICALL                                                 
          7      > RETURN                                                   1

Function test:
Finding entry points
Branch analysis from position: 0
Return found
filename:       /in/S6bLQ
function name:  test
number of ops:  4
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   RECV                                             !0      
    3     1        ADD                                              ~1      !0, 1
          2      > RETURN_BY_REF                                            ~1
    4     3*     > RETURN_BY_REF                                            null

End of function test

Generated using Vulcan Logic Dumper, using php 8.0.0


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