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<?php namespace foo; class MyException extends \Exception {} $class = '\\foo\\MyException'; echo "$class\n", '1) ', var_export(is_subclass_of($class, "\\Exception"), true), "\n", '2) ', var_export(is_subclass_of("\\foo\\MyException", "\\Exception"), true), "\n", '3) ', var_export(assert('is_subclass_of($class, "\\Exception")'), true), "\n", '4) ', var_export(assert('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/nN2Kc
function name:  (null)
number of ops:  51
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'
   12    26        ECHO                                                     '3%29+'
         27        INIT_NS_FCALL_BY_NAME                                    'foo%5Cvar_export'
         28        ASSERT_CHECK                                     $7      
         29        INIT_NS_FCALL_BY_NAME                                    'foo%5Cassert'
         30        SEND_VAL_EX                                              'is_subclass_of%28%24class%2C+%22%5CException%22%29'
         31        SEND_VAL_EX                                              'assert%28%27is_subclass_of%28%24class%2C+%22%5C%5CException%22%29%27%29'
         32        DO_FCALL                                      0  $7      
         33        SEND_VAR_NO_REF_EX                                       $7
         34        SEND_VAL_EX                                              <true>
         35        DO_FCALL                                      0  $8      
         36        ECHO                                                     $8
         37        ECHO                                                     '%0A'
   13    38        ECHO                                                     '4%29+'
         39        INIT_NS_FCALL_BY_NAME                                    'foo%5Cvar_export'
         40        ASSERT_CHECK                                     $9      
         41        INIT_NS_FCALL_BY_NAME                                    'foo%5Cassert'
         42        SEND_VAL_EX                                              'is_subclass_of%28%22%5Cfoo%5CMyException%22%2C+%22%5CException%22%29'
         43        SEND_VAL_EX                                              'assert%28%27is_subclass_of%28%22%5C%5Cfoo%5C%5CMyException%22%2C+%22%5C%5CException%22%29%27%29'
         44        DO_FCALL                                      0  $9      
         45        SEND_VAR_NO_REF_EX                                       $9
         46        SEND_VAL_EX                                              <true>
         47        DO_FCALL                                      0  $10     
         48        ECHO                                                     $10
         49        ECHO                                                     '%0A'
         50      > RETURN                                                   1

Class foo\MyException: [no user functions]

Generated using Vulcan Logic Dumper, using php 8.0.0


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