3v4l.org

run code in 500+ PHP versions simultaneously
<?php $string = "Porcupines\nare\n\n\n\nporcupiney."; echo preg_replace('~\R{1,2}~', '<br />', $string);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/lAD1J
function name:  (null)
number of ops:  5
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        FRAMELESS_ICALL_3                preg_replace        ~2      '%7E%5CR%7B1%2C2%7D%7E', '%3Cbr+%2F%3E'
          2        OP_DATA                                                      !0
          3        ECHO                                                         ~2
          4      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


preferences:
161.38 ms | 3294 KiB | 13 Q