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<?php $trim = function($str) { return preg_replace('~\(+(\(((?:[^()]*|(?1))*)\))\)+|(\((?:[^()]*|\g{-1})*\))~', '$2$3', $str); }; echo $trim('((((A))))'), "\n"; echo $trim('(((((B+C)*A)*(F))))'), "\n"; echo $trim('(A+B)(B+C)'), "\n"; echo $trim('(((((B+C)*A))))'), "\n"; echo str_repeat('-',15), PHP_EOL; echo $trim('((A+B)+C)'), "\n"; echo $trim('(((A+B))+C)'), "\n"; echo $trim('((((A+B))+C))'), "\n"; echo $trim('(A+(B+C))'), "\n"; echo $trim('(A+((B+C)))'), "\n";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/TWdeB
function name:  (null)
number of ops:  54
compiled vars:  !0 = $trim
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FTWdeB%3A3%240'
          1        ASSIGN                                                   !0, ~1
    7     2        INIT_DYNAMIC_CALL                                        !0
          3        SEND_VAL_EX                                              '%28%28%28%28A%29%29%29%29'
          4        DO_FCALL                                      0  $3      
          5        ECHO                                                     $3
          6        ECHO                                                     '%0A'
    8     7        INIT_DYNAMIC_CALL                                        !0
          8        SEND_VAL_EX                                              '%28%28%28%28%28B%2BC%29%2AA%29%2A%28F%29%29%29%29'
          9        DO_FCALL                                      0  $4      
         10        ECHO                                                     $4
         11        ECHO                                                     '%0A'
    9    12        INIT_DYNAMIC_CALL                                        !0
         13        SEND_VAL_EX                                              '%28A%2BB%29%28B%2BC%29'
         14        DO_FCALL                                      0  $5      
         15        ECHO                                                     $5
         16        ECHO                                                     '%0A'
   10    17        INIT_DYNAMIC_CALL                                        !0
         18        SEND_VAL_EX                                              '%28%28%28%28%28B%2BC%29%2AA%29%29%29%29'
         19        DO_FCALL                                      0  $6      
         20        ECHO                                                     $6
         21        ECHO                                                     '%0A'
   11    22        INIT_FCALL                                               'str_repeat'
         23        SEND_VAL                                                 '-'
         24        SEND_VAL                                                 15
         25        DO_ICALL                                         $7      
         26        ECHO                                                     $7
         27        ECHO                                                     '%0A'
   12    28        INIT_DYNAMIC_CALL                                        !0
         29        SEND_VAL_EX                                              '%28%28A%2BB%29%2BC%29'
         30        DO_FCALL                                      0  $8      
         31        ECHO                                                     $8
         32        ECHO                                                     '%0A'
   13    33        INIT_DYNAMIC_CALL                                        !0
         34        SEND_VAL_EX                                              '%28%28%28A%2BB%29%29%2BC%29'
         35        DO_FCALL                                      0  $9      
         36        ECHO                                                     $9
         37        ECHO                                                     '%0A'
   14    38        INIT_DYNAMIC_CALL                                        !0
         39        SEND_VAL_EX                                              '%28%28%28%28A%2BB%29%29%2BC%29%29'
         40        DO_FCALL                                      0  $10     
         41        ECHO                                                     $10
         42        ECHO                                                     '%0A'
   15    43        INIT_DYNAMIC_CALL                                        !0
         44        SEND_VAL_EX                                              '%28A%2B%28B%2BC%29%29'
         45        DO_FCALL                                      0  $11     
         46        ECHO                                                     $11
         47        ECHO                                                     '%0A'
   16    48        INIT_DYNAMIC_CALL                                        !0
         49        SEND_VAL_EX                                              '%28A%2B%28%28B%2BC%29%29%29'
         50        DO_FCALL                                      0  $12     
         51        ECHO                                                     $12
         52        ECHO                                                     '%0A'
         53      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2FTWdeB%3A3%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/TWdeB
function name:  {closure}
number of ops:  8
compiled vars:  !0 = $str
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
    4     1        INIT_FCALL                                               'preg_replace'
          2        SEND_VAL                                                 '%7E%5C%28%2B%28%5C%28%28%28%3F%3A%5B%5E%28%29%5D%2A%7C%28%3F1%29%29%2A%29%5C%29%29%5C%29%2B%7C%28%5C%28%28%3F%3A%5B%5E%28%29%5D%2A%7C%5Cg%7B-1%7D%29%2A%5C%29%29%7E'
          3        SEND_VAL                                                 '%242%243'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $1      
          6      > RETURN                                                   $1
    5     7*     > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FTWdeB%3A3%240

Generated using Vulcan Logic Dumper, using php 8.0.0


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