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Bugs & Features
<?php $heading = '0xFF'; echo ++$heading;
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/1vE4f
function name:  (null)
number of ops:  4
compiled vars:  !0 = $heading
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   ASSIGN                                                   !0, '0xFF'
   4     1        PRE_INC                                          $2      !0
         2        ECHO                                                     $2
         3      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.2.0