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<?php function isCorrect($string) { if (strlen($string) % 2 === 0) { for( $i = 0; $i < strlen($string); $i++) { var_dump($string[0]); } return true; } return false; } $string = '({{}})'; isCorrect($string); //var_dump(isCorrect($string)); //var_dump(strlen($string) % 2); //assert(isCorrect('') === true); //assert(isCorrect('()') === true); //assert(isCorrect('{()}') === true); //assert(isCorrect('{()}{}') === true); //assert(isCorrect('(())') === true); //assert(isCorrect('{({({({()})})})}') === true); //assert(isCorrect('{(})') === false);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/jFlP6
function name:  (null)
number of ops:  5
compiled vars:  !0 = $string
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   11     0  E >   ASSIGN                                                   !0, '%28%7B%7B%7D%7D%29'
   12     1        INIT_FCALL                                               'iscorrect'
          2        SEND_VAR                                                 !0
          3        DO_FCALL                                      0          
   22     4      > RETURN                                                   1

Function iscorrect:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 5, Position 2 = 16
Branch analysis from position: 5
1 jumps found. (Code = 42) Position 1 = 12
Branch analysis from position: 12
2 jumps found. (Code = 44) Position 1 = 15, Position 2 = 7
Branch analysis from position: 15
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
2 jumps found. (Code = 44) Position 1 = 15, Position 2 = 7
Branch analysis from position: 15
Branch analysis from position: 7
Branch analysis from position: 16
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/jFlP6
function name:  isCorrect
number of ops:  18
compiled vars:  !0 = $string, !1 = $i
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   RECV                                             !0      
    3     1        STRLEN                                           ~2      !0
          2        MOD                                              ~3      ~2, 2
          3        IS_IDENTICAL                                             ~3, 0
          4      > JMPZ                                                     ~4, ->16
    4     5    >   ASSIGN                                                   !1, 0
          6      > JMP                                                      ->12
    5     7    >   INIT_FCALL                                               'var_dump'
          8        FETCH_DIM_R                                      ~6      !0, 0
          9        SEND_VAL                                                 ~6
         10        DO_ICALL                                                 
    4    11        PRE_INC                                                  !1
         12    >   STRLEN                                           ~9      !0
         13        IS_SMALLER                                               !1, ~9
         14      > JMPNZ                                                    ~10, ->7
    7    15    > > RETURN                                                   <true>
    9    16    > > RETURN                                                   <false>
   10    17*     > RETURN                                                   null

End of function iscorrect

Generated using Vulcan Logic Dumper, using php 8.0.0


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