PHP 7에서 mcrypt_encrypt 와 mcrypt_decrypt 함수 사용하기 해피정닷컴?ABCDEFG!@#$%^&*12345678암호화 256-bit encrypted : l8dDfL+WfTkzI4NOpICf+xVuzw2W4CjRNBmzb+wud47EYgokhlkNC4j1UjRabzMFSJZuZ+bs6nzCn2nKMNTSkA== 복호화 256-bit decrypted : 해피정닷컴?ABCDEFG!@#$%^&*12345678