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<?php $str = "racecar"; $pal = ""; for($a=0; $a<strlen($str); $a++) { for($z=0; $z<strlen($str); $z++) { $subs = substr($str, $a-1, $z); if( $subs == strrev($subs) and strlen($subs) > strlen($pal) ) { $pal = $subs; } } } echo $pal;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 29
Branch analysis from position: 29
2 jumps found. (Code = 44) Position 1 = 32, Position 2 = 4
Branch analysis from position: 32
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 25
Branch analysis from position: 25
2 jumps found. (Code = 44) Position 1 = 28, Position 2 = 6
Branch analysis from position: 28
2 jumps found. (Code = 44) Position 1 = 32, Position 2 = 4
Branch analysis from position: 32
Branch analysis from position: 4
Branch analysis from position: 6
2 jumps found. (Code = 46) Position 1 = 18, Position 2 = 22
Branch analysis from position: 18
2 jumps found. (Code = 43) Position 1 = 23, Position 2 = 24
Branch analysis from position: 23
2 jumps found. (Code = 44) Position 1 = 28, Position 2 = 6
Branch analysis from position: 28
Branch analysis from position: 6
Branch analysis from position: 24
Branch analysis from position: 22
filename:       /in/hSN4b
function name:  (null)
number of ops:  34
compiled vars:  !0 = $str, !1 = $pal, !2 = $a, !3 = $z, !4 = $subs
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'racecar'
    4     1        ASSIGN                                                   !1, ''
    6     2        ASSIGN                                                   !2, 0
          3      > JMP                                                      ->29
    8     4    >   ASSIGN                                                   !3, 0
          5      > JMP                                                      ->25
    9     6    >   INIT_FCALL                                               'substr'
          7        SEND_VAR                                                 !0
          8        SUB                                              ~9      !2, 1
          9        SEND_VAL                                                 ~9
         10        SEND_VAR                                                 !3
         11        DO_ICALL                                         $10     
         12        ASSIGN                                                   !4, $10
   10    13        INIT_FCALL                                               'strrev'
         14        SEND_VAR                                                 !4
         15        DO_ICALL                                         $12     
         16        IS_EQUAL                                         ~13     !4, $12
         17      > JMPZ_EX                                          ~13     ~13, ->22
         18    >   STRLEN                                           ~14     !4
         19        STRLEN                                           ~15     !1
         20        IS_SMALLER                                       ~16     ~15, ~14
         21        BOOL                                             ~13     ~16
         22    > > JMPZ                                                     ~13, ->24
   12    23    >   ASSIGN                                                   !1, !4
    8    24    >   PRE_INC                                                  !3
         25    >   STRLEN                                           ~19     !0
         26        IS_SMALLER                                               !3, ~19
         27      > JMPNZ                                                    ~20, ->6
    6    28    >   PRE_INC                                                  !2
         29    >   STRLEN                                           ~22     !0
         30        IS_SMALLER                                               !2, ~22
         31      > JMPNZ                                                    ~23, ->4
   18    32    >   ECHO                                                     !1
         33      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
159.83 ms | 1400 KiB | 17 Q