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<?php namespace ABC; class DEF {} var_dump(class_exists('DEF')); var_dump(class_exists('ABC\DEF'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/phg9k
function name:  (null)
number of ops:  13
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   INIT_NS_FCALL_BY_NAME                                    'ABC%5Cvar_dump'
          1        INIT_NS_FCALL_BY_NAME                                    'ABC%5Cclass_exists'
          2        SEND_VAL_EX                                              'DEF'
          3        DO_FCALL                                      0  $0      
          4        SEND_VAR_NO_REF_EX                                       $0
          5        DO_FCALL                                      0          
    8     6        INIT_NS_FCALL_BY_NAME                                    'ABC%5Cvar_dump'
          7        INIT_NS_FCALL_BY_NAME                                    'ABC%5Cclass_exists'
          8        SEND_VAL_EX                                              'ABC%5CDEF'
          9        DO_FCALL                                      0  $2      
         10        SEND_VAR_NO_REF_EX                                       $2
         11        DO_FCALL                                      0          
         12      > RETURN                                                   1

Class ABC\DEF: [no user functions]

Generated using Vulcan Logic Dumper, using php 8.0.0


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