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<?php $matt = "cool"; $cool = "dev"; echo ${$matt};
based on R55AT
Finding entry points
Branch analysis from position: 0
Jump found. (Code = 62) Position 1 = -2
filename:       /in/XXXBP
function name:  (null)
number of ops:  5
compiled vars:  !0 = $matt, !1 = $cool
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   ASSIGN                                                   !0, 'cool'
   3     1        ASSIGN                                                   !1, 'dev'
   4     2        FETCH_R                      local               $4      !0
         3        ECHO                                                     $4
         4      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.2.0