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<?php namespace foo; class MyException extends \Exception {} $class = '\\foo\\MyException'; echo "$class\n", '1) ', var_export(is_subclass_of($class, "\\Exception"), true), "\n", '2) ', var_export(is_subclass_of("\\foo\\MyException", "\\Exception"), true), "\n";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/iTfJv
function name:  (null)
number of ops:  27
compiled vars:  !0 = $class
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   ASSIGN                                                   !0, '%5Cfoo%5CMyException'
    9     1        NOP                                                      
          2        FAST_CONCAT                                      ~2      !0, '%0A'
          3        ECHO                                                     ~2
   10     4        ECHO                                                     '1%29+'
          5        INIT_NS_FCALL_BY_NAME                                    'foo%5Cvar_export'
          6        INIT_NS_FCALL_BY_NAME                                    'foo%5Cis_subclass_of'
          7        SEND_VAR_EX                                              !0
          8        SEND_VAL_EX                                              '%5CException'
          9        DO_FCALL                                      0  $3      
         10        SEND_VAR_NO_REF_EX                                       $3
         11        SEND_VAL_EX                                              <true>
         12        DO_FCALL                                      0  $4      
         13        ECHO                                                     $4
         14        ECHO                                                     '%0A'
   11    15        ECHO                                                     '2%29+'
         16        INIT_NS_FCALL_BY_NAME                                    'foo%5Cvar_export'
         17        INIT_NS_FCALL_BY_NAME                                    'foo%5Cis_subclass_of'
         18        SEND_VAL_EX                                              '%5Cfoo%5CMyException'
         19        SEND_VAL_EX                                              '%5CException'
         20        DO_FCALL                                      0  $5      
         21        SEND_VAR_NO_REF_EX                                       $5
         22        SEND_VAL_EX                                              <true>
         23        DO_FCALL                                      0  $6      
         24        ECHO                                                     $6
         25        ECHO                                                     '%0A'
         26      > RETURN                                                   1

Class foo\MyException: [no user functions]

Generated using Vulcan Logic Dumper, using php 8.0.0


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148.7 ms | 1395 KiB | 17 Q