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<?php $obj = new stdClass; $obj->{123} = '456'; // defined property but unusable as obj->property; see below. print_r($obj); echo 'Via {123}: ' . $obj->{123},"\n"; if (isset($obj->{123})) { echo '123 is set',"\n";} if (property_exists($obj,123)) echo 'property 123 exists',"\n"; echo $obj->{123}; // Parse error: ...unexpected '123' (T_LNUMBER), expecting identifier (T_STRING) or variable (T_VARIABLE) or '{' or '$' echo "\n..............................\n"; $obj->{'a123'} = $obj->{123}; print_r($obj); echo 'Via Property a123: ' . $obj->a123,"\n"; // making a hash out of property a $obj->a["123"] = $obj->{'123'}; $obj->a["a123"] = $obj->{'a123'}; var_dump($obj); echo 'Via Property "a" and hashkey "123": ' . $obj->a["123"],"\n"; // contrast: $obj = (object)array('123' => '456'); // '123' => 123 and identifers must be strings print_r($obj); echo $obj->{'123'},"\n"; // so "Undefined property: stdClass::$123" if (!property_exists($obj,'123')) echo 'property 123 does not exist',"\n"; $obj = new stdClass; $obj->name = "blabe"; echo "The rain in {$obj->name} ...";
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 14, Position 2 = 16
Branch analysis from position: 14
2 jumps found. (Code = 43) Position 1 = 21, Position 2 = 23
Branch analysis from position: 21
2 jumps found. (Code = 43) Position 1 = 66, Position 2 = 68
Branch analysis from position: 66
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 68
Branch analysis from position: 23
Branch analysis from position: 16
filename:       /in/OdqDU
function name:  (null)
number of ops:  79
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, '123'
          4        OP_DATA                                                  '456'
    4     5        INIT_FCALL                                               'print_r'
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                                 
    5     8        FETCH_OBJ_R                                      ~6      !0, '123'
          9        CONCAT                                           ~7      'Via+%7B123%7D%3A+', ~6
         10        ECHO                                                     ~7
         11        ECHO                                                     '%0A'
    6    12        ISSET_ISEMPTY_PROP_OBJ                                   !0, '123'
         13      > JMPZ                                                     ~8, ->16
         14    >   ECHO                                                     '123+is+set'
         15        ECHO                                                     '%0A'
    7    16    >   INIT_FCALL                                               'property_exists'
         17        SEND_VAR                                                 !0
         18        SEND_VAL                                                 123
         19        DO_ICALL                                         $9      
         20      > JMPZ                                                     $9, ->23
         21    >   ECHO                                                     'property+123+exists'
         22        ECHO                                                     '%0A'
    8    23    >   FETCH_OBJ_R                                      ~10     !0, '123'
         24        ECHO                                                     ~10
    9    25        ECHO                                                     '%0A..............................%0A'
   10    26        FETCH_OBJ_R                                      ~12     !0, '123'
         27        ASSIGN_OBJ                                               !0, 'a123'
         28        OP_DATA                                                  ~12
   11    29        INIT_FCALL                                               'print_r'
         30        SEND_VAR                                                 !0
         31        DO_ICALL                                                 
   12    32        FETCH_OBJ_R                                      ~14     !0, 'a123'
         33        CONCAT                                           ~15     'Via+Property+a123%3A+', ~14
         34        ECHO                                                     ~15
         35        ECHO                                                     '%0A'
   15    36        FETCH_OBJ_R                                      ~18     !0, '123'
         37        FETCH_OBJ_W                                      $16     !0, 'a'
         38        ASSIGN_DIM                                               $16, 123
         39        OP_DATA                                                  ~18
   16    40        FETCH_OBJ_R                                      ~21     !0, 'a123'
         41        FETCH_OBJ_W                                      $19     !0, 'a'
         42        ASSIGN_DIM                                               $19, 'a123'
         43        OP_DATA                                                  ~21
   17    44        INIT_FCALL                                               'var_dump'
         45        SEND_VAR                                                 !0
         46        DO_ICALL                                                 
   18    47        FETCH_OBJ_R                                      ~23     !0, 'a'
         48        FETCH_DIM_R                                      ~24     ~23, 123
         49        CONCAT                                           ~25     'Via+Property+%22a%22+and+hashkey+%22123%22%3A+', ~24
         50        ECHO                                                     ~25
         51        ECHO                                                     '%0A'
   21    52        CAST                                          8  ~26     <array>
         53        ASSIGN                                                   !0, ~26
   22    54        INIT_FCALL                                               'print_r'
         55        SEND_VAR                                                 !0
         56        DO_ICALL                                                 
   23    57        FETCH_OBJ_R                                      ~29     !0, '123'
         58        ECHO                                                     ~29
         59        ECHO                                                     '%0A'
   24    60        INIT_FCALL                                               'property_exists'
         61        SEND_VAR                                                 !0
         62        SEND_VAL                                                 '123'
         63        DO_ICALL                                         $30     
         64        BOOL_NOT                                         ~31     $30
         65      > JMPZ                                                     ~31, ->68
         66    >   ECHO                                                     'property+123+does+not+exist'
         67        ECHO                                                     '%0A'
   26    68    >   NEW                                              $32     'stdClass'
         69        DO_FCALL                                      0          
         70        ASSIGN                                                   !0, $32
   27    71        ASSIGN_OBJ                                               !0, 'name'
         72        OP_DATA                                                  'blabe'
   28    73        ROPE_INIT                                     3  ~38     'The+rain+in+'
         74        FETCH_OBJ_R                                      ~36     !0, 'name'
         75        ROPE_ADD                                      1  ~38     ~38, ~36
         76        ROPE_END                                      2  ~37     ~38, '+...'
         77        ECHO                                                     ~37
         78      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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