php-simple symmetric encryption algorithm and reciprocal transfer function between string and hexadecimal

1<?PHP2 /**3 * Encryption of simple symmetric encryption algorithm4 * @param string $string strings that need to be encrypted5 * @param String $skey encryption Eky6 * @return String7 */8 functionEncode$string= ",$skey= ' testphp ') {9  　　 $skey=Str_split(Base64_encode($skey));Ten  　　 $STRARR=Str_split(Base64_encode($string)); One  　　 $strCount=Count($STRARR); A  　　 foreach($skey  as $key=$value) { -  　　　　 $key<$strCount&&$STRARR[$key].=$value; - } the  　　 return Str_replace(' = ', ' o0o0o ',Join(‘‘,$STRARR)); - } -  - /** + * Decryption of simple symmetric encryption algorithm - * @param string $string A string to decrypt + * @param String $skey Decrypt key A * @return String at */ - functionDecode$string= ",$skey= ' testphp ') { -  　　 $skey=Str_split(Base64_encode($skey)); -  　　 $STRARR=Str_split(Str_replace(' o0o0o ', ' = ',$string), 2); -  　　 $strCount=Count($STRARR); -  　　 foreach($skey  as $key=$value) { in  　　　　 $key<$strCount&&$STRARR[$key][1] = = =$value&&$STRARR[$key] =$STRARR[$key][0]; - } to  　　 return Base64_decode(Join(‘‘,$STRARR)); + } -  the //string converted to 16 binary * functionStr2hex ($str,$encoded= ' GBK ') { $  　　 $hex= ' ';Panax Notoginseng  　　 if($encoded= = ' GBK ') { -  　　　　 $str= Mb_convert_encoding ($str, ' GBK ', ' UTF-8 '); the } +  　　  for($i= 0,$length= Mb_strlen ($str);$i<$length;$i++) { A  　　　　 $hex.=Dechex(Ord($str{$i})); the } +  　　 return $hex; - } $  $ //16 binary converted to string - functionHEX2STR ($hex,$encoded= ' GBK ') { -  　　 $str= ' '; the  　　 $arr=Str_split($hex, 2); -  　　 foreach($arr  as $bit) {Wuyi  　　　　 $str.=CHR(Hexdec($bit)); the } -  　　 if($encoded= = ' GBK ') { Wu  　　　　 $str= Mb_convert_encoding ($str, ' UTF-8 ', ' GBK '); - } About  　　 return $str; $}

php-simple symmetric encryption algorithm and reciprocal transfer function between string and hexadecimal