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<?php $a = 'a'; $a++; echo $a;
based on uLicW
Finding entry points
Branch analysis from position: 0
Jump found. (Code = 62) Position 1 = -2
filename:       /in/rkmQT
function name:  (null)
number of ops:  5
compiled vars:  !0 = $a
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   ASSIGN                                                   !0, 'a'
   4     1        POST_INC                                         ~2      !0
         2        FREE                                                     ~2
   5     3        ECHO                                                     !0
         4      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.1.0