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<?php function a () { } unserialize ( serialize ( new ArrayIterator ) ) [ array () ] -> b = a () ;
based on g8o3L
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/PlFZO
function name:  (null)
number of ops:  15
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   INIT_FCALL                                               'unserialize'
         1        INIT_FCALL                                               'serialize'
         2        NEW                                              $0      :23
         3        DO_FCALL                                      0          
         4        SEND_VAR                                                 $0
         5        DO_ICALL                                         $2      
         6        SEND_VAR                                                 $2
         7        DO_ICALL                                         $3      
         8        SEPARATE                                         $3      $3
         9        INIT_FCALL                                               'a'
        10        DO_FCALL                                      0  $6      
        11        FETCH_DIM_W                                      $4      $3, <array>
        12        ASSIGN_OBJ                                               $4, 'b'
        13        OP_DATA                                                  $6
        14      > RETURN                                                   1

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

End of function a

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