PHP5与MySQL数据库操作常用代码 收集

2015-01-24信息快讯网

php最近比较热门,所以学习php的朋友也越来越多,这里整理下数据库的一些操作,需要的朋友可以参考下。

1 建立数据库表:
create database club; 
create table member( 
id int(11) not null auto_increment, 
no varchar(5) not null, 
name varchar(10) not null, 
age int(2) not null, 
level varchar(10) not null, 
sex tinyint(1) not null, 
date datetime not null, 
primary key(id) 
)engine=MyISAM default charset=GB2312; 
insert into member(id,no,name,age,level,sex,date)values 
(1,'A001','wanxia',30,'hj',1,'2008-04-02 00:00:00'), 
(2,'C022','liyan',29,'zs',1,'2007-05-31 00:00:00'), 
(3,'A006','zhangyan',36,'hj',1,'2007-06-20 00:00:00'), 
(4,'B052','luanying',42,'bj',1,'2007-02-12 00:00:00'), 
(5,'A007','duxiang',26,'hj',2,'2008-03-26 00:00:00'), 
(6,'C060','liuyu',38,'zs',1,'2008-10-16 00:00:00'); 

PHP5与MySQL数据库操作常用代码 收集_信息快讯网
2 读取数据
2.1 建立01.php
代码
 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html;charset=GB2312"/> 
<title>会员列表</title> 
</head> 
<?php 
$link=mysql_connect("localhost","root","123"); //连接mysql服务器 
$db=mysql_select_db("club"); //选择数据库 
mysql_query("set names utf8",$link); //设定编码方式 
$sql="Select * from member"; 
$result=mysql_query($sql,$link); //执行select查询 
$num=mysql_num_rows($result); //获取记录查询 
?> 
<body> 
<h1>健身俱乐部 会员名册</h1> 
<br /> 
点击姓名可查看该会员详细资料,现有会员<?php echo $num ?>人。 
<br /> 
<?php 
if($num>0) 
{ 
?> 
<table border="1" cellpadding="1" cellspacing="1"> 
<tr> 
<td>序号</td> 
<td>姓名</td> 
<td>性别</td> 
</tr> 
<?php 
while($row=mysql_fetch_array($result)) 
{ 
echo "<tr><td>".$row['id']."</td><td><a href=member.php?name=" 
.$row['name'].">".$row['name']."</a></td><td>" 
.($row['sex']==1?"女":"男")."</td></tr>"; 
} 
?> 
</table> 
<?php 
} 
else 
{ 
echo "俱乐部尚未发展会员。"; 
} 
?> 
</body> 
</html> 

2.2 建立member.php
 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html;charset=GB2312"/> 
<title>会员详细资料</title> 
</head> 
<?php 
$link=mysql_connect("localhost","root","123"); //连接mysql服务器 
$db=mysql_select_db("club"); //选择数据库 
mysql_query("set names utf8",$link); //设定编码方式 
$sql="select no,name,sex,age,level,date_format(date,'%Y-%c-%d') as join_date from member " 
."where name='".trim($_GET['name'])."'"; 
$result=mysql_query($sql,$link); //执行在select查询 
?> 
<body> 
<h1>健身俱乐部 会员详细资料</h1> 
<?php 
if($row=mysql_fetch_array($result)) 
{ 
echo "编号:".$row['no']."<br />"; 
echo "姓名:".$row['name']."<br />"; 
echo "性别:".($row['sex']==1?"女":"男")."<br />"; 
echo "年龄:".$row['age']."<br />"; 
echo "级别:".$row['level']."<br />"; 
echo "加入:".$row['join_date']."<br />"; 
} 
?> 
</body> 
</html> 

PHP5与MySQL数据库操作常用代码 收集_信息快讯网PHP5与MySQL数据库操作常用代码 收集_信息快讯网
3 修改数据
3.1 建立level.php(修改数据)
 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html;charset=GB2312" /> 
<title>俱乐部优惠活动</title> 
</head> 
<body> 
<h1>俱乐部会员统计表</h1> 
<?php 
$link=mysql_connect("localhost","root","123"); //连接mysql服务器 
$db=mysql_select_db("club"); //选择数据库 
mysql_query("set name utf8",$link); //设定编码方式 
$sql="Select level,count(*) as num from member group by level"; 
$result=mysql_query($sql,$link); //执行select查询 
while($row=mysql_fetch_array($result)) 
{ 
switch($row['level']){ 
case 'bj': 
echo "等级:白金会员     人数:".$row['num']."<br />"; 
break; 
case 'hj': 
echo "等级:黄金会员     人数:".$row['num']."<br />"; 
break; 
default: 
echo "等级:钻石会员     人数:".$row['num']."<br />"; 
} 
} 
?> 
<form action="up_level.php" name="level" method="post"> 
会员优惠升级:从 
<select name="old_level"> 
<option value="hj">黄金会员</option> 
<option value="bj">白金会员</option> 
</select> 
升级至 
<select name="new_level"> 
<option value="bj">白金会员</option> 
<option value="zs">钻石会员</option> 
</select> 
<input type="submit" value="确定"/> 
</form> 
</body> 
</html> 

3.2 建立up_level.php
 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html;charset=GB2312" /> 
<title>俱乐部优惠活动</title> 
</head> 
<body> 
<?php 
$link=mysql_connect("localhost","root","123"); //连接mysql服务器 
$db=mysql_select_db("club"); //选择数据库 
mysql_query("set name utf8",$link); //设定编码方式 
$sql="update member set level='".trim($_POST['new_level']) 
."' where level='".trim($_POST['old_level'])."'"; 
$result=mysql_query($sql,$link); //执行select查询 
echo mysql_affected_rows($link)."人 从"; 
switch(trim($_POST['old_level'])){ 
case 'bj': 
echo " 白金会员 " ; 
break; 
case 'hj': 
echo " 黄金会员 "; 
break; 
default: 
echo " 钻石会员 "; 
} 
echo "成功升级到"; 
switch(trim($_POST['new_level'])){ 
case 'bj': 
echo " 白金会员 " ; 
break; 
case 'hj': 
echo " 黄金会员 "; 
break; 
default: 
echo " 钻石会员 "; 
} 
?> 
</body> 
</html> 

PHP5与MySQL数据库操作常用代码 收集_信息快讯网

PHP5与MySQL数据库操作常用代码 收集_信息快讯网 
4 添加数据
4.1 建立add_member.php

 
<html> 
<meta http-equiv="Content-Type" content="text/html;charset=GB2312"/> 
<title>新增会员</title> 
<body> 
<h1>新加入会员</h1> 
<form action="newmember.php" method="post" name="add_member"> 
编号:<input type="text" name="no" width="40"/><br /> 
姓名:<input type="text" name="name" width="40"/><br /> 
性别: 
<input type="radio" name="sex" value="1" />女 
<input type="radio" name="sex" value="2" />男<br /> 
年龄:<input type="text" name="age" width="40" /><br /> 
级别: 
<select name="level"> 
<option value="hj">黄金会员</option> 
<option value="bj">白金会员</option> 
<option value="zs">钻石会员</option> 
</select><br /> 
<input type="submit" value="确定" /> 
</form> 
</body> 
</html> 

4.2 建立newmember.php
 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html;charset=GB2312" /> 
<title>添加会员</title> 
</head> 
<body> 
<?php 
$link=mysql_connect("localhost","root","123"); //连接mysql服务器 
$db=mysql_select_db("club"); //选择数据库 
mysql_query("set names GB2312",$link); //设定编码方式 
$sql="Insert member(no,name,sex,age,level,date) values('" 
.trim($_POST['no'])."','".trim($_POST['name'])."','" 
.trim($_POST['sex'])."','".trim($_POST['age'])."','" 
.trim($_POST['level'])."',now())"; 
$result=mysql_query($sql,$link); //执行select查询 
$m_id=mysql_insert_id($link); //得到新插入会员记录的id 
if(trim($_POST['level'])=="hj") //判断新会员优惠 
{ 
$sql="Update member set level='bj' where id='".$m_id."'"; 
$result=mysql_query($sql,$link); //执行会员升级优惠 
$text="已享受优惠升级至白金会员。"; 
} 
$sql="Select *,date_format(date,'%Y-%c-%d') as join_date from member " 
."where id='".$m_id."'"; 
$result=mysql_query($sql,$link); //执行select查询 
if($row=mysql_fetch_array($result)) 
{ 
echo "新会员资料:<br />"; 
echo "编号:".$row['no']."<br />"; 
echo "姓名:".$row['name']."<br />"; 
echo "性别:".($row['sex']==1?"女":"男"."<br />"); 
echo "年龄:".$row['age']."<br />"; 
echo "级别:".$row['level']."<br />"; 
echo "加入:".$row['join_date']."<br />"; 
} 
echo "新会员".$row['name']."添加成功".$text; 
?> 
</body> 
</html> 

PHP5与MySQL数据库操作常用代码 收集_信息快讯网 PHP5与MySQL数据库操作常用代码 收集_信息快讯网

PHP5与MySQL数据库操作常用代码 收集_信息快讯网 
5 创建类数据库连接
5.1 建立cls_mysql.php类文件

 
<?php 
class cls_mysql 
{ 
protected $link_id; 
function __construct($dbhost,$dbuser,$dbpw,$dbname='',$charset='GB2312') 
{ 
if(!($this->link_id=mysql_connect($dbhost,$dbuser,$dbpw))) 
{ 
$this->ErrorMsg("Can't pConnect MySQL Server($dbhost)!"); 
} 
mysql_query("SET NAMES ".$charset,$this->link_id); 
if($dbname) 
{ 
if(mysql_select_db($dbname,$this->link_id)===false) 
{ 
$this->ErrorMsg("Can't slect MYSQL database($dbname)!"); 
return false; 
} 
else 
{ 
return true; 
} 
} 
} 
public function select_database($dbname) 
{ 
return mysql_select_db($dbname,$this->link_id); 
} 
public function fetch_array($query,$result_type=MYSQL_ASSOC) 
{ 
return mysql_fetch_array($query,$result_type); 
} 
public function query($sql) 
{ 
return mysql_query($sql,$this->link_id); 
} 
public function affected_rows() 
{ 
return mysql_affected_rows($this->link_id); 
} 
public function num_rows($query) 
{ 
return mysql_num_rows($query); 
} 
public function insert_id() 
{ 
return_insert_id($this->link_id); 
} 
public function selectLimit($sql,$num,$start=0) 
{ 
if($start==0) 
{ 
$sql.=' LIMIT '.$num; 
} 
else 
{ 
$sql.=' LIMIT '.$start.', '.$num; 
} 
return $this->query($sql); 
} 
public function getOne($sql,$limited=false) 
{ 
if($limited=true) 
{ 
$sql=trim($sql.' LIMIT 1'); 
} 
$res=$this->query($sql); 
if($res!=false) 
{ 
$row=mysql_fetch_row($res); 
return $row[0]; 
} 
else 
{ 
return false; 
} 
} 
public function getAll($sql) 
{ 
$res=$this->query($sql); 
if($res!==false) 
{ 
$arr=array(); 
while($row=mysql_fetch_assoc($res)) 
{ 
$arr[]=$row; 
} 
return $arr; 
} 
else 
{ 
return false; 
} 
} 
function ErrorMsg($message='',$sql='') 
{ 
if($message) 
{ 
echo "<b> error info</b>:$message\n\n"; 
} 
else 
{ 
echo "<b>MySQL server error report:"; 
print_r($this->error_message); 
} 
exit; 
} 
} 
?> 

5.2 建立test.php
 
<?php 
include("cls_mysql.php"); 
?> 
<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html;charset=GB2312" /> 
<title>Mysql类库测试</title> 
</head> 
<body> 
<?php 
$sql="Select * from member"; 
$db=new cls_mysql('localhost','root','123','club','GB2312'); 
$result=$db->selectLimit($sql,'3'); //从数据库中返回3个会员资料 
if($result) 
{ 
while($row=$db->fetch_array($result)) 
{ 
echo "会员编号: " .$row['no'].",姓名:".$row['name']."<br />"; 
} 
} 
?> 
</body> 
</html> 

PHP5与MySQL数据库操作常用代码 收集_信息快讯网
6 总结
6.1 mysql_connect():建立与MySQL服务器的连接
6.2 mysql_select_db():选择数据库
6.3 mysql_query():执行数据库查询
6.4 mysql_fetch_array():获取数据库记录
6.5 mysql_num_rows():获取查询得到的记录数
6.6 mysql_affected_rows():最近一次操作影响到的行数
6.7 mysql_insert_id():最近一次插入记录的ID值

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