php【基础学习十一】简单的加解密

<?php/** * Created by PhpStorm. * User: dell * Date: 2015/12/28 * Time: 9:59 *///大致的了解下加密解密$str = 'apple';if (md5($str) === '1f3870be274f6c49b3e31a0c6728957f') {    echo "Would you like a green or red apple?".'<br>';}$str = "My name is liaojianguo";//$key = "123qwe.019860905";$key = "12345678";//$cipher = MCRYPT_RIJNDAEL_128;$cipher = MCRYPT_DES;$mode = MCRYPT_MODE_ECB;$iv = mcrypt_create_iv(mcrypt_get_iv_size($cipher,$mode),MCRYPT_RAND);echo "原文：".$str."<br>";$str_encrypt = mcrypt_encrypt($cipher,$key,$str,$mode,$iv);echo "加密后的内容是：".$str_encrypt."<br>";$str_decrypt = mcrypt_decrypt($cipher,$key,$str_encrypt,$mode,$iv);echo "解密后的内容：".$str_decrypt."<br>";