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<?php $iterator = new IteratorIterator( new EmptyIterator() ); var_dump($iterator instanceof SeekableIterator); var_dump(method_exists($iterator, 'seek')); $iterator = new NoRewindIterator( new EmptyIterator() ); var_dump(method_exists($iterator, 'seek'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/LEBSJ
function name:  (null)
number of ops:  31
compiled vars:  !0 = $iterator
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   NEW                                              $1      'IteratorIterator'
    3     1        NEW                                              $2      'EmptyIterator'
          2        DO_FCALL                                      0          
          3        SEND_VAR_NO_REF_EX                                       $2
          4        DO_FCALL                                      0          
    2     5        ASSIGN                                                   !0, $1
    6     6        INIT_FCALL                                               'var_dump'
          7        INSTANCEOF                                       ~6      !0, 'SeekableIterator'
          8        SEND_VAL                                                 ~6
          9        DO_ICALL                                                 
    7    10        INIT_FCALL                                               'var_dump'
         11        INIT_FCALL                                               'method_exists'
         12        SEND_VAR                                                 !0
         13        SEND_VAL                                                 'seek'
         14        DO_ICALL                                         $8      
         15        SEND_VAR                                                 $8
         16        DO_ICALL                                                 
    9    17        NEW                                              $10     'NoRewindIterator'
   10    18        NEW                                              $11     'EmptyIterator'
         19        DO_FCALL                                      0          
         20        SEND_VAR_NO_REF_EX                                       $11
         21        DO_FCALL                                      0          
    9    22        ASSIGN                                                   !0, $10
   12    23        INIT_FCALL                                               'var_dump'
         24        INIT_FCALL                                               'method_exists'
         25        SEND_VAR                                                 !0
         26        SEND_VAL                                                 'seek'
         27        DO_ICALL                                         $15     
         28        SEND_VAR                                                 $15
         29        DO_ICALL                                                 
         30      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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