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<?php $a = array("foo" => "bar"); echo "Give me {$a[foo]}";
Finding entry points
Branch analysis from position: 0
Jump found. (Code = 62) Position 1 = -2
filename:       /in/PNtcd
function name:  (null)
number of ops:  7
compiled vars:  !0 = $a
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   ASSIGN                                                   !0, <array>
   3     1        FETCH_CONSTANT                                   ~2      'foo'
         2        FETCH_DIM_R                                      $3      !0, ~2
         3        NOP                                                      
         4        FAST_CONCAT                                      ~4      'Give+me+', $3
         5        ECHO                                                     ~4
         6      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.2.0