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<?php $number = 2e1; echo $number;
based on t67pJ
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Nh1PH
function name:  (null)
number of ops:  3
compiled vars:  !0 = $number
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   ASSIGN                                                   !0, 20
   5     1        ECHO                                                     !0
         2      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0