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<?php $a = [1, 2, 3]; function foo(&$a) { $b = $a; $a[] = count($a) + 1; return $b; } var_dump( foo($a), // return value is *before* $a // after );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/072Pi
function name:  (null)
number of ops:  9
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
   12     1        INIT_FCALL                                               'var_dump'
   13     2        INIT_FCALL                                               'foo'
          3        SEND_REF                                                 !0
          4        DO_FCALL                                      0  $2      
          5        SEND_VAR                                                 $2
   14     6        SEND_VAR                                                 !0
   12     7        DO_ICALL                                                 
   15     8      > RETURN                                                   1

Function foo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/072Pi
function name:  foo
number of ops:  8
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   RECV                                             !0      
    6     1        ASSIGN                                                   !1, !0
    7     2        COUNT                                            ~4      !0
          3        ADD                                              ~5      ~4, 1
          4        ASSIGN_DIM                                               !0
          5        OP_DATA                                                  ~5
    9     6      > RETURN                                                   !1
   10     7*     > RETURN                                                   null

End of function foo

Generated using Vulcan Logic Dumper, using php 8.0.0


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