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<?php function foo() {} var_dump(spl_autoload_register('foo', true, true)); var_dump(spl_autoload_register('foo', true, true));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/d5nfi
function name:  (null)
number of ops:  17
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'spl_autoload_register'
          2        SEND_VAL                                                 'foo'
          3        SEND_VAL                                                 <true>
          4        SEND_VAL                                                 <true>
          5        DO_ICALL                                         $0      
          6        SEND_VAR                                                 $0
          7        DO_ICALL                                                 
    6     8        INIT_FCALL                                               'var_dump'
          9        INIT_FCALL                                               'spl_autoload_register'
         10        SEND_VAL                                                 'foo'
         11        SEND_VAL                                                 <true>
         12        SEND_VAL                                                 <true>
         13        DO_ICALL                                         $2      
         14        SEND_VAR                                                 $2
         15        DO_ICALL                                                 
         16      > RETURN                                                   1

Function foo:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/d5nfi
function name:  foo
number of ops:  1
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E > > RETURN                                                   null

End of function foo

Generated using Vulcan Logic Dumper, using php 8.0.0


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