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<?php $row = array(1, 2, 3, 4); echo " <h2>question</h2> <p>".chr(64 + 1)."</p> <h2>answer</h2> <p>".chr(64 + 8)."</p>";
based on F1DVZ
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/0kPa5
function name:  (null)
number of ops:  13
compiled vars:  !0 = $row
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   ASSIGN                                                   !0, <array>
   6     1        INIT_FCALL                                               'chr'
         2        SEND_VAL                                                 65
         3        DO_ICALL                                         $2      
         4        CONCAT                                           ~3      '%0A%3Ch2%3Equestion%3C%2Fh2%3E%0A%3Cp%3E', $2
   8     5        CONCAT                                           ~4      ~3, '%3C%2Fp%3E%0A%3Ch2%3Eanswer%3C%2Fh2%3E%0A%3Cp%3E'
         6        INIT_FCALL                                               'chr'
         7        SEND_VAL                                                 72
         8        DO_ICALL                                         $5      
         9        CONCAT                                           ~6      ~4, $5
        10        CONCAT                                           ~7      ~6, '%3C%2Fp%3E'
        11        ECHO                                                     ~7
        12      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0