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<?php $a = 0x01; $b = 0x02; printf ("%x", ($a << $b.$b));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/CuXvs
function name:  (null)
number of ops:  9
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 1
    4     1        ASSIGN                                                   !1, 2
    5     2        INIT_FCALL                                               'printf'
          3        SEND_VAL                                                 '%25x'
          4        SL                                               ~4      !0, !1
          5        CONCAT                                           ~5      ~4, !1
          6        SEND_VAL                                                 ~5
          7        DO_ICALL                                                 
          8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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