3v4l.org

run code in 500+ PHP versions simultaneously
<?php function autoLoadClass($name) { foreach(debug_backtrace() as $call) { if(!array_key_exists('type', $call) && $call['function'] == 'class_exists') { return; } } echo 'spl_autoload_register: ', $name, '<br>'; } spl_autoload_register('autoLoadClass'); class_exists('Foo'); class_exists('Bar'); class_exists('Foo\\Bar');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/MYmq7
function name:  (null)
number of ops:  10
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   11     0  E >   INIT_FCALL                                                   'spl_autoload_register'
          1        SEND_VAL                                                     'autoLoadClass'
          2        DO_ICALL                                                     
   13     3        FRAMELESS_ICALL_1                class_exists        ~1      'Foo'
          4        FREE                                                         ~1
   14     5        FRAMELESS_ICALL_1                class_exists        ~2      'Bar'
          6        FREE                                                         ~2
   15     7        FRAMELESS_ICALL_1                class_exists        ~3      'Foo%5CBar'
          8        FREE                                                         ~3
          9      > RETURN                                                       1

Function autoloadclass:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 77) Position 1 = 4, Position 2 = 15
Branch analysis from position: 4
2 jumps found. (Code = 78) Position 1 = 5, Position 2 = 15
Branch analysis from position: 5
2 jumps found. (Code = 46) Position 1 = 8, Position 2 = 11
Branch analysis from position: 8
2 jumps found. (Code = 43) Position 1 = 12, Position 2 = 14
Branch analysis from position: 12
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 14
1 jumps found. (Code = 42) Position 1 = 4
Branch analysis from position: 4
Branch analysis from position: 11
Branch analysis from position: 15
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 15
filename:       /in/MYmq7
function name:  autoLoadClass
number of ops:  20
compiled vars:  !0 = $name, !1 = $call
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    2     0  E >   RECV                                                 !0      
    3     1        INIT_FCALL                                                   'debug_backtrace'
          2        DO_ICALL                                             $2      
          3      > FE_RESET_R                                           $3      $2, ->15
          4    > > FE_FETCH_R                                                   $3, !1, ->15
    4     5    >   ARRAY_KEY_EXISTS                                     ~4      'type', !1
          6        BOOL_NOT                                             ~5      ~4
          7      > JMPZ_EX                                              ~5      ~5, ->11
          8    >   FETCH_DIM_R                                          ~6      !1, 'function'
          9        IS_EQUAL                                             ~7      ~6, 'class_exists'
         10        BOOL                                                 ~5      ~7
         11    > > JMPZ                                                         ~5, ->14
    5    12    >   FE_FREE                                                      $3
         13      > RETURN                                                       null
    3    14    > > JMP                                                          ->4
         15    >   FE_FREE                                                      $3
    8    16        ECHO                                                         'spl_autoload_register%3A+'
         17        ECHO                                                         !0
         18        ECHO                                                         '%3Cbr%3E'
    9    19      > RETURN                                                       null

End of function autoloadclass

Generated using Vulcan Logic Dumper, using php 8.5.0


preferences:
176.83 ms | 3249 KiB | 16 Q