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<?php $re = '/[\t\n]+(?=[^][]*(?:(\[(?:[^][]++|(?1))*])[^][]*)*])/'; $str = "settings:a [\n a:[\n a:a\n b:b\n ]\n b:[\n a:a\n b:b\n ]\n]\n\nsettings:b [\n a:[\n \n\na:a\n b:b\n ]\n]"; echo preg_replace($re, ' ', $str);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/aQ3eq
function name:  (null)
number of ops:  9
compiled vars:  !0 = $re, !1 = $str
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%2F%5B%5Ct%5Cn%5D%2B%28%3F%3D%5B%5E%5D%5B%5D%2A%28%3F%3A%28%5C%5B%28%3F%3A%5B%5E%5D%5B%5D%2B%2B%7C%28%3F1%29%29%2A%5D%29%5B%5E%5D%5B%5D%2A%29%2A%5D%29%2F'
    4     1        ASSIGN                                                   !1, 'settings%3Aa+%5B%0A%09a%3A%5B%0A%09%09a%3Aa%0A%09%09b%3Ab%0A%09%5D%0A%09b%3A%5B%0A%09%09a%3Aa%0A%09%09b%3Ab%0A%09%5D%0A%5D%0A%0Asettings%3Ab+%5B%0A%09a%3A%5B%0A%09%0A%0Aa%3Aa%0A%09%09b%3Ab%0A%09%5D%0A%5D'
    5     2        INIT_FCALL                                               'preg_replace'
          3        SEND_VAR                                                 !0
          4        SEND_VAL                                                 '+'
          5        SEND_VAR                                                 !1
          6        DO_ICALL                                         $4      
          7        ECHO                                                     $4
          8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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