obj-poly.php

<?php
interface Intf { 
    public function getA();
}

class MyFoo implements Intf {
    public $a;
    public function getA() {
        return $this->a;
    }
}

function get(Intf $anyIntf) {
    return $anyIntf->getA();
}

get(new MyFoo);

vld-without-xdebug

Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /Users/c9s/src/php/explain/obj-poly.php
function name:  (null)
number of ops:  11
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   NOP
   6     1        DECLARE_CLASS                                    $1      '%00myfoo%2FUsers%2Fc9s%2Fsrc%2Fphp%2Fexplain%2Fobj-poly.php0x10f0ca043', 'myfoo'
         2        ADD_INTERFACE                                            $1, 'Intf'
  11     3        VERIFY_ABSTRACT_CLASS                                    $1
  13     4        NOP
  17     5        FETCH_CLASS                                   0  :2      'MyFoo'
         6        NEW                                              $3      :2
         7        DO_FCALL_BY_NAME                              0
         8        SEND_VAR_NO_REF                               2          $3
         9        DO_FCALL                                      1          'get'
  18    10      > RETURN                                                   1

branch: #  0; line:     2-   18; sop:     0; eop:    10; out1:  -2
path #1: 0,
Function get:
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /Users/c9s/src/php/explain/obj-poly.php
function name:  get
number of ops:  5
compiled vars:  !0 = $anyIntf
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
  13     0  E >   RECV                                             !0
  14     1        INIT_METHOD_CALL                                         !0, 'getA'
         2        DO_FCALL_BY_NAME                              0  $1
         3      > RETURN                                                   $1
  15     4*     > RETURN                                                   null

branch: #  0; line:    13-   15; sop:     0; eop:     4
path #1: 0,
End of function get

Class Intf:
Function geta:
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /Users/c9s/src/php/explain/obj-poly.php
function name:  getA
number of ops:  2
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   RAISE_ABSTRACT_ERROR
         1      > RETURN                                                   null

branch: #  0; line:     3-    3; sop:     0; eop:     1; out1:  -2
path #1: 0,
End of function geta

End of class Intf.

Class MyFoo:
Function geta:
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /Users/c9s/src/php/explain/obj-poly.php
function name:  getA
number of ops:  3
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   9     0  E >   FETCH_OBJ_R                                      $0      'a'
         1      > RETURN                                                   $0
  10     2*     > RETURN                                                   null

branch: #  0; line:     9-   10; sop:     0; eop:     2
path #1: 0,
End of function geta

End of class MyFoo.

vld-xdebug

Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /Users/c9s/src/php/explain/obj-poly.php
function name:  (null)
number of ops:  19
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   EXT_STMT
         1        NOP
   6     2        EXT_STMT
         3        DECLARE_CLASS                                    $1      '%00myfoo%2FUsers%2Fc9s%2Fsrc%2Fphp%2Fexplain%2Fobj-poly.php0x107fd0043', 'myfoo'
         4        ADD_INTERFACE                                            $1, 'Intf'
  11     5        VERIFY_ABSTRACT_CLASS                                    $1
  13     6        EXT_STMT
         7        NOP
  17     8        EXT_STMT
         9        EXT_FCALL_BEGIN
        10        FETCH_CLASS                                   0  :2      'MyFoo'
        11        EXT_FCALL_BEGIN
        12        NEW                                              $3      :2
        13        DO_FCALL_BY_NAME                              0
        14        EXT_FCALL_END
        15        SEND_VAR_NO_REF                               2          $3
        16        DO_FCALL                                      1          'get'
        17        EXT_FCALL_END
  18    18      > RETURN                                                   1

Function get:
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /Users/c9s/src/php/explain/obj-poly.php
function name:  get
number of ops:  10
compiled vars:  !0 = $anyIntf
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
  13     0  E >   EXT_NOP
         1        RECV                                             !0
  14     2        EXT_STMT
         3        INIT_METHOD_CALL                                         !0, 'getA'
         4        EXT_FCALL_BEGIN
         5        DO_FCALL_BY_NAME                              0  $1
         6        EXT_FCALL_END
         7      > RETURN                                                   $1
  15     8*       EXT_STMT
         9*     > RETURN                                                   null

End of function get

Class Intf:
Function geta:
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /Users/c9s/src/php/explain/obj-poly.php
function name:  getA
number of ops:  4
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   EXT_NOP
         1        RAISE_ABSTRACT_ERROR
         2        EXT_STMT
         3      > RETURN                                                   null

End of function geta

End of class Intf.

Class MyFoo:
Function geta:
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /Users/c9s/src/php/explain/obj-poly.php
function name:  getA
number of ops:  6
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   8     0  E >   EXT_NOP
   9     1        EXT_STMT
         2        FETCH_OBJ_R                                      $0      'a'
         3      > RETURN                                                   $0
  10     4*       EXT_STMT
         5*     > RETURN                                                   null

End of function geta

End of class MyFoo.