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<?php class SomeClass { protected string|stdClass $a; } $unionType = (new \ReflectionClass(SomeClass::class))->getProperty('a')->getType(); var_dump($unionType->isBuiltin());
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/5BDRn
function name:  (null)
number of ops:  15
compiled vars:  !0 = $unionType
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    7     0  E >   NEW                                                  $1      'ReflectionClass'
          1        SEND_VAL_EX                                                  'SomeClass'
          2        DO_FCALL                                          0          
          3        INIT_METHOD_CALL                                             $1, 'getProperty'
          4        SEND_VAL_EX                                                  'a'
          5        DO_FCALL                                          0  $3      
          6        INIT_METHOD_CALL                                             $3, 'getType'
          7        DO_FCALL                                          0  $4      
          8        ASSIGN                                                       !0, $4
    8     9        INIT_FCALL                                                   'var_dump'
         10        INIT_METHOD_CALL                                             !0, 'isBuiltin'
         11        DO_FCALL                                          0  $6      
         12        SEND_VAR                                                     $6
         13        DO_ICALL                                                     
         14      > RETURN                                                       1

Class SomeClass: [no user functions]

Generated using Vulcan Logic Dumper, using php 8.5.0


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