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<?php $str = 'áâãäąăāæåß§śšşçćčźżžýųűů'; var_export( preg_replace( '~.{8}\K(?!$)~u', "\n", $str ) );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Flc25
function name:  (null)
number of ops:  7
compiled vars:  !0 = $str
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, '%C3%A1%C3%A2%C3%A3%C3%A4%C4%85%C4%83%C4%81%C3%A6%C3%A5%C3%9F%C2%A7%C5%9B%C5%A1%C5%9F%C3%A7%C4%87%C4%8D%C5%BA%C5%BC%C5%BE%C3%BD%C5%B3%C5%B1%C5%AF'
    5     1        INIT_FCALL                                                   'var_export'
    6     2        FRAMELESS_ICALL_3                preg_replace        ~2      '%7E.%7B8%7D%5CK%28%3F%21%24%29%7Eu', '%0A'
    9     3        OP_DATA                                                      !0
          4        SEND_VAL                                                     ~2
    5     5        DO_ICALL                                                     
   11     6      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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