PHP基于mcript扩展实现对称加密功能示例

 <?php header(<div style="color:transparent">来源gaodai.ma#com搞#代!码网</div>"content-type:text/html;charset=utf-8"); $str = "我是加密前的内容"; //加密内容 $key = "key:1111"; //密钥 $cipher = MCRYPT_DES; //密码类型 $modes = MCRYPT_MODE_ECB; //密码模式 $iv = mcrypt_create_iv(mcrypt_get_iv_size($cipher,$modes),MCRYPT_RAND);//初始化向量 echo "加密明文：".$str."<p>"; $str_encrypt = mcrypt_encrypt($cipher,$key,$str,$modes,$iv); //加密函数 echo "加密密文：".$str_encrypt." </p><p>"; echo $str_encrypt=base64_encode($str_encrypt); 

 <?php header("content-type:text/html;charset=utf-8"); $key = "key:1111"; //密钥 $cipher = MCRYPT_DES; //密码类型 $modes = MCRYPT_MODE_ECB; //密码模式 $iv = mcrypt_create_iv(mcrypt_get_iv_size($cipher,$modes),MCRYPT_RAND);//初始化向量 $str_encrypt="trn1duq6vt4i8v66Ea9jo7qZ2X7JWmkf";//这里的值是第2步中的$str_encrypt=base64_encode($str_encrypt); $str_encrypt=base64_decode($str_encrypt); echo "加密密文：".$str_encrypt." <p>"; $str_decrypt = mcrypt_decrypt($cipher,$key,$str_encrypt,$modes,$iv); //解密函数 echo "还原：".$str_decrypt;