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<?php var_dump(token_get_all('<?php abstract class A<$T1 isin B, $T2 isout C> '));
based on EnWBM
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/eVDO0
function name:  (null)
number of ops:  7
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   INIT_FCALL                                               'var_dump'
         1        INIT_FCALL                                               'token_get_all'
   7     2        SEND_VAL                                                 '%3C%3Fphp+%0A%0Aabstract+class+A%3C%24T1+isin+B%2C+%24T2+isout+C%3E%0A%0A'
         3        DO_ICALL                                         $0      
         4        SEND_VAR                                                 $0
         5        DO_ICALL                                                 
         6      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0