Php simple encryption/Decryption

I just learned php soon. Please kindly advise! None? Php *** Lite version of encryption and decryption class * @ author clothing QQ780998900 * @ packgeSimpleTools * @ linkcommoner.cn clothing blog * @ copyrightcommoner.cn * classSimpleCrypt {*** the more complicated the key *, the better, but the string length will be integer.

I just learned php soon. Please kindly advise! None? Php/*** Lite version encryption/Decryption class * @ author cloth QQ 780998900 * @ packge SimpleTools * @ link http://commoner.cn cloth blog * @ copyright http://commoner.cn */class SimpleCrypt {/*** key * The more complex the better, but the string length will be integer.

I just learned php soon. Please kindly advise! <无>

  200? Ceil ($ str_num/10): ceil ($ str_num/8); // generate a random string $ head_rand_loop_num = ($ head_loop_num * 10)-$ head_loop_num; $ end_rand_loop_num = ($ end_loop_num + $ head_loop_num) * 10-$ end_loop_num; $ head_rand_str = null; $ end_rand_str = null; // The first half of the random string; $ I <$ head_rand_loop_num; $ I ++) {$ head_rand_str. = self: $ word [rand (0, 51)];} // The half-end random string for ($ I = 0; $ I <$ end_rand_loop_num; $ I ++) {$ End_rand_str. = self: $ word [rand (0, 51)];} // encrypt the First Half of the content for ($ I = 0; $ I <$ head_loop_num; $ I ++) {$ head_str = base64_encode ($ head_str);} // tear up the variable unset ($ I); // encrypt the second half of the content for ($ I = 0; $ I <$ end_loop_num; $ I ++) {$ end_str = base64_encode ($ end_str);} // merge $ implode_str = $ head_rand_str. $ head_str. self: $ key. base64_encode ($ head_loop_num ). self: $ key. base64_encode ($ end_loop_num ). self: $ key. $ en D_str. $ end_rand_str; $ result = base64_encode ($ implode_str); // to continue later, return $ result first ;} /*** decryption algorithm ** @ param $ str the String to be decrypted * @ return String the decrypted String */public static function decode ($ str) {// obtain the encrypted information $ get = explode (self: $ key, base64_decode ($ str); $ head_str = $ get [0]; $ end_str = $ get [3]; $ head_loop_num = base64_decode ($ get [1]); $ end_loop_num = base64_decode ($ get [2]); // Algorithm for removing random strings $ head_rand_num = ($ Head_loop_num * 10)-$ head_loop_num; $ end_rand_num = ($ end_loop_num + $ head_loop_num) * 10-$ end_loop_num; // remove random strings, get the original $ head_str = substr ($ head_str, $ head_rand_num, strlen ($ head_str); $ end_str = substr ($ end_str, 0, strlen ($ end_str)-$ end_rand_num ); // decrypt the First Half of the data for ($ I = 0; $ I <$ head_loop_num; $ I ++) {$ head_str = base64_decode ($ head_str );} // tear up the variable unset ($ I); // decrypt the half-end part for ($ I = 0; $ I <$ en D_loop_num; $ I ++) {$ end_str = base64_decode ($ end_str);} // merge and decrypt $ result = base64_decode ($ head_str. $ end_str); return $ result ;}}?>