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<?php function reverse($string) { $substr1 = ""; $substr2 = ""; $strLength = strlen($string); $strLengthHalf = round($strLength / 2); for ($i = 0; $i < $strLengthHalf -$i; $i++) { var_dump($strLength-$i); var_dump($strLengthHalf - $i); $substr1 .= $string[$strLength-$i]; $substr2 .= $string[$strLengthHalf - $i]; } //var_dump($substr1); //var_dump($substr2); return $string = $substr1.$substr2; } var_dump(reverse('12345'));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/8lISI
function name:  (null)
number of ops:  7
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   18     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'reverse'
          2        SEND_VAL                                                 '12345'
          3        DO_FCALL                                      0  $0      
          4        SEND_VAR                                                 $0
          5        DO_ICALL                                                 
          6      > RETURN                                                   1

Function reverse:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 27
Branch analysis from position: 27
2 jumps found. (Code = 44) Position 1 = 30, Position 2 = 12
Branch analysis from position: 30
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 12
2 jumps found. (Code = 44) Position 1 = 30, Position 2 = 12
Branch analysis from position: 30
Branch analysis from position: 12
filename:       /in/8lISI
function name:  reverse
number of ops:  34
compiled vars:  !0 = $string, !1 = $substr1, !2 = $substr2, !3 = $strLength, !4 = $strLengthHalf, !5 = $i
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   RECV                                             !0      
    3     1        ASSIGN                                                   !1, ''
    4     2        ASSIGN                                                   !2, ''
    5     3        STRLEN                                           ~8      !0
          4        ASSIGN                                                   !3, ~8
    6     5        INIT_FCALL                                               'round'
          6        DIV                                              ~10     !3, 2
          7        SEND_VAL                                                 ~10
          8        DO_ICALL                                         $11     
          9        ASSIGN                                                   !4, $11
    7    10        ASSIGN                                                   !5, 0
         11      > JMP                                                      ->27
    8    12    >   INIT_FCALL                                               'var_dump'
         13        SUB                                              ~14     !3, !5
         14        SEND_VAL                                                 ~14
         15        DO_ICALL                                                 
    9    16        INIT_FCALL                                               'var_dump'
         17        SUB                                              ~16     !4, !5
         18        SEND_VAL                                                 ~16
         19        DO_ICALL                                                 
   10    20        SUB                                              ~18     !3, !5
         21        FETCH_DIM_R                                      ~19     !0, ~18
         22        ASSIGN_OP                                     8          !1, ~19
   11    23        SUB                                              ~21     !4, !5
         24        FETCH_DIM_R                                      ~22     !0, ~21
         25        ASSIGN_OP                                     8          !2, ~22
    7    26        PRE_INC                                                  !5
         27    >   SUB                                              ~25     !4, !5
         28        IS_SMALLER                                               !5, ~25
         29      > JMPNZ                                                    ~26, ->12
   15    30    >   CONCAT                                           ~27     !1, !2
         31        ASSIGN                                           ~28     !0, ~27
         32      > RETURN                                                   ~28
   16    33*     > RETURN                                                   null

End of function reverse

Generated using Vulcan Logic Dumper, using php 8.0.0


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