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<?php class A { function x() { $this->y(); } function y() { echo 'a'; } } class B extends A { function y() { echo 'b'; } } $b = new B(); $b->x();
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/vIQ0c
function name:  (null)
number of ops:  6
compiled vars:  !0 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   18     0  E >   NEW                                              $1      'B'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $1
   19     3        INIT_METHOD_CALL                                         !0, 'x'
          4        DO_FCALL                                      0          
          5      > RETURN                                                   1

Class A:
Function x:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/vIQ0c
function name:  x
number of ops:  3
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   INIT_METHOD_CALL                                         'y'
          1        DO_FCALL                                      0          
    6     2      > RETURN                                                   null

End of function x

Function y:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/vIQ0c
function name:  y
number of ops:  2
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    8     0  E >   ECHO                                                     'a'
    9     1      > RETURN                                                   null

End of function y

End of class A.

Class B:
Function y:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/vIQ0c
function name:  y
number of ops:  2
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   14     0  E >   ECHO                                                     'b'
   15     1      > RETURN                                                   null

End of function y

Function x:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/vIQ0c
function name:  x
number of ops:  3
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   INIT_METHOD_CALL                                         'y'
          1        DO_FCALL                                      0          
    6     2      > RETURN                                                   null

End of function x

End of class B.

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