obj.php

<?php
class A {

    protected $bar;

    public function getBar() {
        return $this->bar;
    }

}

$a = new A;
$bar = $a->getBar();

vld.output

± % php -dvld.active=1 obj.php                                                                                        !14934
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /Users/c9s/src/php/explain/obj.php
function name:  (null)
number of ops:  16
compiled vars:  !0 = $a, !1 = $bar
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   EXT_STMT
         1        NOP
  12     2        EXT_STMT
         3        FETCH_CLASS                                   0  :1      'A'
         4        EXT_FCALL_BEGIN
         5        NEW                                              $2      :1
         6        DO_FCALL_BY_NAME                              0
         7        EXT_FCALL_END
         8        ASSIGN                                                   !0, $2
  13     9        EXT_STMT
        10        INIT_METHOD_CALL                                         !0, 'getBar'
        11        EXT_FCALL_BEGIN
        12        DO_FCALL_BY_NAME                              0  $6
        13        EXT_FCALL_END
        14        ASSIGN                                                   !1, $6
  14    15      > RETURN                                                   1

branch: #  0; line:     2-   14; sop:     0; eop:    15; out1:  -2
path #1: 0,
Class A:
Function getbar:
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /Users/c9s/src/php/explain/obj.php
function name:  getBar
number of ops:  6
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   6     0  E >   EXT_NOP
   7     1        EXT_STMT
         2        FETCH_OBJ_R                                      $0      'bar'
         3      > RETURN                                                   $0
   8     4*       EXT_STMT
         5*     > RETURN                                                   null

branch: #  0; line:     6-    8; sop:     0; eop:     5
path #1: 0,
End of function getbar

vld.output-public

± % php -dvld.active=1 obj-public.php                                                                                 !14941
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /Users/c9s/src/php/explain/obj-public.php
function name:  (null)
number of ops:  13
compiled vars:  !0 = $a, !1 = $foo
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   EXT_STMT
         1        NOP
   6     2        EXT_STMT
         3        FETCH_CLASS                                   0  :1      'A'
         4        EXT_FCALL_BEGIN
         5        NEW                                              $2      :1
         6        DO_FCALL_BY_NAME                              0
         7        EXT_FCALL_END
         8        ASSIGN                                                   !0, $2
   7     9        EXT_STMT
        10        FETCH_OBJ_R                                      $5      !0, 'foo'
        11        ASSIGN                                                   !1, $5
   8    12      > RETURN                                                   1

branch: #  0; line:     2-    8; sop:     0; eop:    12; out1:  -2
path #1: 0,
Class A: [no user functions]