1 cookie部分 2 1.setcookie("user","xiangzishi110",time()+3600);//设置user的变量，有效期为3600秒 3 2.setcookie("user","",time()-3600);//注销 4 3.$_COOKIE["user"];//调用 5 4 if(isset($_COOKIE["user"])){}//判断是否设置了user的cookie 6  7 session部分 8 1.
     //在head前就需要调用session_start(); 9 2.$_SESSION["user"];10 3.if(isset($_SESSION["user"])){}11 4.unset($_SESSION["user"]);//释放user的session12 5.session_destroy();//彻底终结session13 14 mysql语句15 insert into article (title,content,id) value ('第一本',‘这个书很好看’，null)16 select * from article order by id desc17 delete from article where id=118 update article set title='第二本' where id=219 20 数据库操作21 mysql_fetch_array22 mysql_fetch_assoc 返回关联数组23 mysql_num_rows($result) 返回查询结果条数24 mysql_unbuffered_query()25 mysql_query()26 mysqli_real_escape_string( $link,$GET['username'] )