PHP Encrypted decryption number

1<?PHP2 /**3 * Encryption decryption class, PHP encryption decryption number, for URL encryption4 * This algorithm only supports encrypted numbers. Compare the encryption decryption that applies to the ID field in the database, and the encryption based on the digital display URL. 5 * @version Alpha6 * @ Encryption Principle Tag length + complement + number substitution7 * @ Encryption Step:8 * A-z,a-z,0-9 62 characters, take the first m (number of digits the largest digit) bit as a marker length string, take the m+1 to the M+10 bit as the number substitution string, the remainder is the complement string9 * 1. Calculate the number length n, take the nth bit of garbled characters as the length of the mark. Ten * 2. Calculate the length of the complement, the length of the encrypted string N-1-n is the length of the complement. Gets the complement string based on the specified algorithm.  One * 3. Replace the number with a numeric replacement string to get a digitally encrypted string.  A * Tag length character + complement string + numeric encrypted string = encrypted strings - * Usage: - * $obj = new Xdeode (9); the * $e _txt = $obj->encode (123); - * echo $e _txt. ' <br/> '; - * echo $key->decode ($e _txt); -  */ + classXdeode - { +     Private $strbase= "Flpvf70csakvjqgewupxqxsyjizmnh6b1u3b8caekwtd54nrtzomdhog2ylri"; A     Private $key,$length,$codelen,$codenums,$codeext; at     function__construct ($length= 9,$key= 2543.5415412812){ -         $this-Key=$key; -         $this->length =$length; -         $this->codelen =substr($this->strbase,0,$this-length); -         $this->codenums =substr($this->strbase,$this->length,10); -         $this->codeext =substr($this->strbase,$this->length + 10); in     } -  to  +     functionEncode$nums){ -         $rtn= ""; the         $numslen=strlen($nums); *         //the length of the first digit of the ciphertext tag $         $begin=substr($this->codelen,$numslen-The);Panax Notoginseng  -         //extension bits of ciphertext the         $extlen=$this->length-$numslen-1; +         $temp=Str_replace(‘.‘, ‘‘,$nums/$this-Key); A         $temp=substr($temp,-$extlen); the  +         $arrextTemp=Str_split($this-codeext); -         $arrext=Str_split($temp); $         foreach($arrext  as $v) { $             $rtn.=$arrextTemp[$v]; -         } -  the         $arrnumsTemp=Str_split($this-codenums); -         $arrnums=Str_split($nums);Wuyi         foreach($arrnums  as $v) { the             $rtn.=$arrnumsTemp[$v]; -         } Wu         return $begin.$rtn; -     } About  $  -     functionDecode$code){ -  -         $begin=substr($code, 0,1); A         $rtn= ' '; +         $len=Strpos($this->codelen,$begin); the         if($len!==false){ -             $len++; $             $arrnums=Str_split(substr($code,-$len)); the             foreach($arrnums  as $v) { the                 $rtn.=Strpos($this->codenums,$v); the             } the         } -  in         return $rtn; the     } the } About  the $obj=NewXdeode (10); the Echo $obj->encode (1). " <br/> "; the Echo $obj->encode (2). " <br/> "; + Echo $obj->encode (3). " <br/> "; - Echo $obj->encode (4). " <br/> "; the Echo $obj->encode (5). " <br/> ";Bayi Echo $obj->encode (6). " <br/> "; the Echo $obj->encode (7). " <br/> "; the Echo $obj->encode (8). " <br/> "; - Echo $obj->encode (9). " <br/> "; - Echo $obj->encode (10). " <br/> "; the Echo $obj->encode (45762454). " <br/> "; the Echo $obj->encode (1023213123). " <br/> "; the Echo $obj->encode (134320). " <br/> "; the Echo' ; -  the Echo $obj->decode (' FZXXMYQZXV '). " <br/> "; the Echo $obj->decode (' FSSYJZXSSJ '). " <br/> "; the Echo $obj->decode (' Fmnyixhxnq '). " <br/> ";94 Echo $obj->decode (' FQJJZHSSJG '). " <br/> "; the Echo $obj->decode (' Fzyqinziye '). " <br/> "; the Echo $obj->decode (' Fizmqynyzw '). " <br/> "; the Echo $obj->decode (' Fnsnsxxjyu '). " <br/> ";98 Echo $obj->decode (' FQNHYNJJHP '). " <br/> "; About Echo $obj->decode (' Fyiqiimiix '). " <br/> "; - Echo $obj->decode (' Lxxmyqzxvk '). " <br/> ";101 Echo $obj->decode (' Csgeuwjgeg '). " <br/> ";102 Echo $obj->decode (' AQSSMNHXXZZJJNVKJQJVQVJQ '). " <br/> ";103 Echo $obj->decode (' 7ziiVqgqjk '). " <br/> ";104  the //FZXXMYQZXV106 //FSSYJZXSSJ107 //FMNYIXHXNQ108 //FQJJZHSSJG109 //fzyqinziye the //FIZMQYNYZW111 //fnsnsxxjyu the //FQNHYNJJHP113 //fyiqiimiix the //LXXMYQZXVK the //csgeuwjgeg the //AQSSMNHXXZZJJNVKJQJVQVJQ117 //7ZIIVQGQJK118 //1119 //2 - //3121 //4122 //5123 //6124 //7 the //8126 //9127 //10 - //45762454129 //1023213123 the //134320

PHP Encrypted decryption number