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<?php class P { static $a=9; public $az; function __get($var) { return self::$var; } function __isset($var) { return true; } } $P=new P; var_dump(isset($P->az));
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/uZibe
function name:  (null)
number of ops:  9
compiled vars:  !0 = $P
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   4     0  E >   NOP                                                      
  23     1        NEW                                              $2      :-6
         2        DO_FCALL                                      0          
         3        ASSIGN                                                   !0, $2
  25     4        INIT_FCALL                                               'var_dump'
         5        ISSET_ISEMPTY_PROP_OBJ                           ~5      !0, 'az'
         6        SEND_VAL                                                 ~5
         7        DO_ICALL                                                 
         8      > RETURN                                                   1

Class P:
Function __get:
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/uZibe
function name:  __get
number of ops:  5
compiled vars:  !0 = $var
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   9     0  E >   RECV                                             !0      
  10     1        FETCH_CLASS                                 513  :1      
         2        FETCH_R                      static member       $2      'var'
         3      > RETURN                                                   $2
  12     4*     > RETURN                                                   null

End of function __get

Function __isset:
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/uZibe
function name:  __isset
number of ops:  3
compiled vars:  !0 = $var
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
  15     0  E >   RECV                                             !0      
  16     1      > RETURN                                                   <true>
  17     2*     > RETURN                                                   null

End of function __isset

End of class P.

Generated using Vulcan Logic Dumper, using php 7.2.0