1<?php 2function encrypt_string($input, $key) { 3  $key = substr(md5($key),0,24); 4  $td = mcrypt_module_open ('tripledes', '', 'ecb', ''); 5  $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size ($td), MCRYPT_RAND); 6  mcrypt_generic_init ($td, $key, $iv); 7  $encrypted_data = mcrypt_generic ($td, gzdeflate($input, 9)); 8  mcrypt_generic_deinit ($td); 9  mcrypt_module_close ($td);10  return trim(str_rot13(base64_encode($encrypted_data)));11}1213function decrypt_string($input, $key) {14  $input = trim(base64_decode(str_rot13($input)));15  $td = mcrypt_module_open ('tripledes', '', 'ecb', '');16  $key = substr(md5($key),0,24);17  $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size ($td), MCRYPT_RAND);18  mcrypt_generic_init ($td, $key, $iv);19  $decrypted_data = mdecrypt_generic ($td, $input);20  mcrypt_generic_deinit ($td);21  mcrypt_module_close ($td);22  return stripslashes(trim(@gzinflate($decrypted_data)));23}24?>