1、 创建新闻发布系统,库名为cms,表名为article,有如下字段,写出创建表的命令?
Id 文章id
Title 文章标题
Content 文章内容
Category_id 文章分类id
Dateline 时间
set names gbk;
create database cms character set utf8;
use cms;
create table article (
id int primary key auto_increment,#文章id
title varchar (30),#文章标题
content varchar (20),#文章内容
category_id int ,#文章分类ID
datetime date #时间
);
2、 写一个操作mysql的类,类名为mysqlDB,类中有连接数据库方法connect()和返回数据库查询结果的二维数组的方法getAll();
mysqlDB.class.php
<?php
//数据库封装类
class mysqlDB
{
public $conn = NULL ;//连接对象
public $rs = NULL ;//结果集对象
//连接数据库
private function __construct()
{
$this->conn = mysql_connect(“localhost”,”name”,”password”);
mysql_query(“set names utf8”);
my sql _select_db(“database”);
}
//防止克隆对象
private function __clone()
{}
//获得该类的对象(单例模式的)
public static function getInstance()
{
static $obj = NULL ;
if ($obj == NULL )
{
$obj = new mysqlDB();
}
return $obj;
}
//执行select语句,返回:二维数组
public function getAll($sql)
{
$result = array ();//存储所有记录
$this->rs = mysql_query($sql);
while ($row = mysql_fetch_array($this->rs))
{
$result[] = $row;
}
return $result;
}
//执行select语句,返回:一维关联数组
public function getRow($sql)
{
$result = NULL ;//存储一条记录
$this->rs = mysql_query($sql);
if ($row = mysql_fetch_array($this->rs))
{
$result = $row;
}
return $result;
}
//执行insert、update、delete语句,返回:受影响的行数
public function exec($sql)
{
mysql_query($sql);
$result = mysql_affected_rows($this->conn);
return $result;
}
//释放结果集
public function freeResult()
{
mysql_free_result($this->rs);
}
//关闭数据库
public function close()
{
mysql_close($this->conn);
}
}
?>
3、 用第一题中的表和第二题中的类写出如下操作:显示点击量最多的10条新闻的标题和发布时间。
insert into article values (‘ ‘,’标题1′,’内容1′,’文章分类ID1’,now());
insert into article values (‘ ‘,’标题2′,’内容2′,’文章分类ID2’,now());
insert into article values (‘ ‘,’标题3′,’内容3′,’文章分类ID3’,now());
insert into article values (‘ ‘,’标题4′,’内容4′,’文章分类ID4’,now());
insert into article values (‘ ‘,’标题5′,’内容5′,’文章分类ID5’,now());
insert into article values (‘ ‘,’标题6′,’内容6′,’文章分类ID6’,now());
insert into article values (‘ ‘,’标题7′,’内容7′,’文章分类ID7’,now());
insert into article values (‘ ‘,’标题8′,’内容8′,’文章分类ID8’,now());
insert into article values (‘ ‘,’标题9′,’内容9′,’文章分类ID9’,now());
insert into article values (‘ ‘,’标题10′,’内容10′,’文章分类ID10’,now());
insert into article values (‘ ‘,’标题11′,’内容11′,’文章分类ID11’,now());
insert into article values (‘ ‘,’标题12′,’内容12′,’文章分类ID12’,now());
insert into article values (‘ ‘,’标题13′,’内容13′,’文章分类ID13’,now());
select * from article;
<?php
header(“content-type:text/ html ;charset=utf-8″);
include_once ‘mysqlDB.class.php’;
$sql = “select title,datetime from article limit 10”;
$conn = mysqlDB::getInstance();
$result = $conn->getAll($sql);
?>
<!DOCTYPE html PUBLIC “-//W3C//D td HTML 4.01 Transitional//EN” “”>
<html>
<head>
<meta http-equiv=”Content-Type” content=”text/html; charset=UTF-8″>
<title>Insert title here</title>
</head>
<body>
<table border=’1′ align=”center”>
<tr>
<td>标题</td>
<td>时间</td>
</tr>
<?php
foreach ($result as $v){
?>
<tr>
<td><?php echo $v[‘title’]?></td>
<td><?php echo $v[‘datetime’]?></td>
</tr>
<?php
}
?>
</table>
</body>
</html>
4、 如果要把article表分成多个表,写出你的大体思路。
create table table2 select * from table1 order by id limit 1,100
create table table3 select * from table1 order by id limit 100,100
create table table4 select * from table1 order by id limit 200,100
5、 请写一个函数验证电子邮件的格式是否正确。
[\w!#$%&’*+/=?^_`{|}~-]+(?:\.[\w!#$%&’*+/=?^_`{|}~-]+)*@(?:[\w](?:[\w-]*[\w])?\.)+[\w](?:[\w-]*[\w])?
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