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<?php $comment = ' <!--This is a comment. <!--This is a comment. Comments are not displayed in the browser --><!--asdasdasdsdadisplayed in the browser--> Comments are not disasdsdahe browser-->'; preg_match('/(\<!--\s*.*?((--\>)|$))/imsx', $comment, $matches); var_dump($matches);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/lRa2Y
function name:  (null)
number of ops:  10
compiled vars:  !0 = $comment, !1 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%0A%0A%3C%21--This+is+a+comment.+%3C%21--This+is+a+comment.+Comments+are+not+displayed+in+the+browser+--%3E%3C%21--asdasdasdsdadisplayed+in+the+browser--%3E+Comments+are+not+disasdsdahe+browser--%3E'
   11     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%2F%28%5C%3C%21--%5Cs%2A.%2A%3F%28%28--%5C%3E%29%7C%24%29%29%2Fimsx'
          3        SEND_VAR                                                 !0
          4        SEND_REF                                                 !1
          5        DO_ICALL                                                 
   13     6        INIT_FCALL                                               'var_dump'
          7        SEND_VAR                                                 !1
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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