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<?php $s= "123 '".$foo['nonexisting']."'"; echo "1"; echo $s;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/IVX0q
function name:  (null)
number of ops:  7
compiled vars:  !0 = $s, !1 = $foo
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   FETCH_DIM_R                                      ~2      !1, 'nonexisting'
          1        CONCAT                                           ~3      '123+%27', ~2
          2        CONCAT                                           ~4      ~3, '%27'
          3        ASSIGN                                                   !0, ~4
    3     4        ECHO                                                     '1'
    4     5        ECHO                                                     !0
          6      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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