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<?php $string = "Porcupines\nare\n\n\n\nporcupiney."; echo preg_replace('/(\r|\n|\r\n){2,}/', '<br/><br/>', $string);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/kLgdD
function name:  (null)
number of ops:  8
compiled vars:  !0 = $string
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'Porcupines%0Aare%0A%0A%0A%0Aporcupiney.'
    5     1        INIT_FCALL                                               'preg_replace'
          2        SEND_VAL                                                 '%2F%28%5Cr%7C%5Cn%7C%5Cr%5Cn%29%7B2%2C%7D%2F'
          3        SEND_VAL                                                 '%3Cbr%2F%3E%3Cbr%2F%3E'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $2      
          6        ECHO                                                     $2
          7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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