3v4l.org

run code in 300+ PHP versions simultaneously
<?php function foo($object) { $object = null; } function bar(&$object) { $object = null; } $o = new stdClass(); var_dump($o); foo($o); var_dump($o); bar($o); var_dump($o);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/04vX5
function name:  (null)
number of ops:  19
compiled vars:  !0 = $o
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   11     0  E >   NEW                                              $1      'stdClass'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $1
   12     3        INIT_FCALL                                               'var_dump'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                                 
   13     6        INIT_FCALL                                               'foo'
          7        SEND_VAR                                                 !0
          8        DO_FCALL                                      0          
   14     9        INIT_FCALL                                               'var_dump'
         10        SEND_VAR                                                 !0
         11        DO_ICALL                                                 
   15    12        INIT_FCALL                                               'bar'
         13        SEND_REF                                                 !0
         14        DO_FCALL                                      0          
   16    15        INIT_FCALL                                               'var_dump'
         16        SEND_VAR                                                 !0
         17        DO_ICALL                                                 
         18      > RETURN                                                   1

Function foo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/04vX5
function name:  foo
number of ops:  3
compiled vars:  !0 = $object
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
    4     1        ASSIGN                                                   !0, null
    5     2      > RETURN                                                   null

End of function foo

Function bar:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/04vX5
function name:  bar
number of ops:  3
compiled vars:  !0 = $object
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   RECV                                             !0      
    8     1        ASSIGN                                                   !0, null
    9     2      > RETURN                                                   null

End of function bar

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
194.81 ms | 1399 KiB | 17 Q