3v4l.org

run code in 300+ PHP versions simultaneously
<?php $obj = new stdClass(); $obj->property1 = FALSE; var_dump(isset($obj->property1)); unset($obj->property1); var_dump(isset($obj->property1)); $obj->property1 = FALSE; var_dump(isset($obj->property1));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Gt6G3
function name:  (null)
number of ops:  21
compiled vars:  !0 = $obj
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   NEW                                              $1      'stdClass'
          1        DO_FCALL                                      0          
          2        ASSIGN                                                   !0, $1
    3     3        ASSIGN_OBJ                                               !0, 'property1'
          4        OP_DATA                                                  <false>
    4     5        INIT_FCALL                                               'var_dump'
          6        ISSET_ISEMPTY_PROP_OBJ                           ~5      !0, 'property1'
          7        SEND_VAL                                                 ~5
          8        DO_ICALL                                                 
    5     9        UNSET_OBJ                                                !0, 'property1'
    6    10        INIT_FCALL                                               'var_dump'
         11        ISSET_ISEMPTY_PROP_OBJ                           ~7      !0, 'property1'
         12        SEND_VAL                                                 ~7
         13        DO_ICALL                                                 
    7    14        ASSIGN_OBJ                                               !0, 'property1'
         15        OP_DATA                                                  <false>
    8    16        INIT_FCALL                                               'var_dump'
         17        ISSET_ISEMPTY_PROP_OBJ                           ~10     !0, 'property1'
         18        SEND_VAL                                                 ~10
         19        DO_ICALL                                                 
         20      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
144.82 ms | 1386 KiB | 15 Q