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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 $obj->{123}; //echo "\n",$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"; echo "\n..............................\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"; echo "\n..............................\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 = 68, Position 2 = 70
Branch analysis from position: 68
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 70
Branch analysis from position: 23
Branch analysis from position: 16
filename:       /in/7gLqt
function name:  (null)
number of ops:  81
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
   10    25        ECHO                                                     '%0A..............................%0A'
   11    26        FETCH_OBJ_R                                      ~12     !0, '123'
         27        ASSIGN_OBJ                                               !0, 'a123'
         28        OP_DATA                                                  ~12
   12    29        INIT_FCALL                                               'print_r'
         30        SEND_VAR                                                 !0
         31        DO_ICALL                                                 
   13    32        FETCH_OBJ_R                                      ~14     !0, 'a123'
         33        CONCAT                                           ~15     'Via+Property+a123%3A+', ~14
         34        ECHO                                                     ~15
         35        ECHO                                                     '%0A'
   14    36        ECHO                                                     '%0A..............................%0A'
   16    37        FETCH_OBJ_R                                      ~18     !0, '123'
         38        FETCH_OBJ_W                                      $16     !0, 'a'
         39        ASSIGN_DIM                                               $16, 123
         40        OP_DATA                                                  ~18
   17    41        FETCH_OBJ_R                                      ~21     !0, 'a123'
         42        FETCH_OBJ_W                                      $19     !0, 'a'
         43        ASSIGN_DIM                                               $19, 'a123'
         44        OP_DATA                                                  ~21
   18    45        INIT_FCALL                                               'var_dump'
         46        SEND_VAR                                                 !0
         47        DO_ICALL                                                 
   19    48        FETCH_OBJ_R                                      ~23     !0, 'a'
         49        FETCH_DIM_R                                      ~24     ~23, 123
         50        CONCAT                                           ~25     'Via+Property+%22a%22+and+hashkey+123%3A+', ~24
         51        ECHO                                                     ~25
         52        ECHO                                                     '%0A'
   20    53        ECHO                                                     '%0A..............................%0A'
   22    54        CAST                                          8  ~26     <array>
         55        ASSIGN                                                   !0, ~26
   23    56        INIT_FCALL                                               'print_r'
         57        SEND_VAR                                                 !0
         58        DO_ICALL                                                 
   24    59        FETCH_OBJ_R                                      ~29     !0, '123'
         60        ECHO                                                     ~29
         61        ECHO                                                     '%0A'
   25    62        INIT_FCALL                                               'property_exists'
         63        SEND_VAR                                                 !0
         64        SEND_VAL                                                 '123'
         65        DO_ICALL                                         $30     
         66        BOOL_NOT                                         ~31     $30
         67      > JMPZ                                                     ~31, ->70
         68    >   ECHO                                                     'property+123+does+not+exist'
         69        ECHO                                                     '%0A'
   27    70    >   NEW                                              $32     'stdClass'
         71        DO_FCALL                                      0          
         72        ASSIGN                                                   !0, $32
   28    73        ASSIGN_OBJ                                               !0, 'name'
         74        OP_DATA                                                  'blabe'
   29    75        ROPE_INIT                                     3  ~38     'The+rain+in+'
         76        FETCH_OBJ_R                                      ~36     !0, 'name'
         77        ROPE_ADD                                      1  ~38     ~38, ~36
         78        ROPE_END                                      2  ~37     ~38, '+...'
         79        ECHO                                                     ~37
         80      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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