3v4l.org

run code in 300+ PHP versions simultaneously
<?php $page_class = "whut\n"; echo @$page_class ?: $page_class; unset($page_class); echo @$page_class ?: $page_class;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ClKb0
function name:  (null)
number of ops:  15
compiled vars:  !0 = $page_class
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'whut%0A'
    4     1        BEGIN_SILENCE                                    ~2      
          2        FETCH_R                      local               ~3      'page_class'
          3        END_SILENCE                                              ~2
          4        JMP_SET                                          ~4      ~3, ->6
          5        QM_ASSIGN                                        ~4      !0
          6        ECHO                                                     ~4
    6     7        UNSET_CV                                                 !0
    7     8        BEGIN_SILENCE                                    ~5      
          9        FETCH_R                      local               ~6      'page_class'
         10        END_SILENCE                                              ~5
         11        JMP_SET                                          ~7      ~6, ->13
         12        QM_ASSIGN                                        ~7      !0
         13        ECHO                                                     ~7
         14      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
151.05 ms | 1393 KiB | 13 Q