3v4l.org

run code in 300+ PHP versions simultaneously
<?php class Bar { private static $instance; public static function getInstance() { if (null === static::$instance) { static::$instance = new static(); } return static::$instance; } protected function __construct() { } } class Foo extends Bar { protected function __construct() { } } Foo::getInstance();
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/oM3B6
function name:  (null)
number of ops:  3
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   22     0  E >   INIT_STATIC_METHOD_CALL                                  'Foo', 'getInstance'
          1        DO_FCALL                                      0          
          2      > RETURN                                                   1

Class Bar:
Function getinstance:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 3, Position 2 = 7
Branch analysis from position: 3
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
filename:       /in/oM3B6
function name:  getInstance
number of ops:  10
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   FETCH_STATIC_PROP_R          unknown             ~0      'instance'
          1        TYPE_CHECK                                    2          ~0
          2      > JMPZ                                                     ~1, ->7
    6     3    >   NEW                          static              $3      
          4        DO_FCALL                                      0          
          5        ASSIGN_STATIC_PROP                                       'instance'
          6        OP_DATA                                                  $3
    8     7    >   FETCH_STATIC_PROP_R          unknown             ~5      'instance'
          8      > RETURN                                                   ~5
    9     9*     > RETURN                                                   null

End of function getinstance

Function __construct:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/oM3B6
function name:  __construct
number of ops:  1
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   13     0  E > > RETURN                                                   null

End of function __construct

End of class Bar.

Class Foo:
Function __construct:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/oM3B6
function name:  __construct
number of ops:  1
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   19     0  E > > RETURN                                                   null

End of function __construct

Function getinstance:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 3, Position 2 = 7
Branch analysis from position: 3
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
filename:       /in/oM3B6
function name:  getInstance
number of ops:  10
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   FETCH_STATIC_PROP_R          unknown             ~0      'instance'
          1        TYPE_CHECK                                    2          ~0
          2      > JMPZ                                                     ~1, ->7
    6     3    >   NEW                          static              $3      
          4        DO_FCALL                                      0          
          5        ASSIGN_STATIC_PROP                                       'instance'
          6        OP_DATA                                                  $3
    8     7    >   FETCH_STATIC_PROP_R          unknown             ~5      'instance'
          8      > RETURN                                                   ~5
    9     9*     > RETURN                                                   null

End of function getinstance

End of class Foo.

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
168.66 ms | 1399 KiB | 13 Q