php实现mysql封装类示例
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发布时间：2022-04-06 02:16
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时间：2022-04-06 03:45
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代码如下:
<?php
class
Mysql
{
private
$host;
private
$user;
private
$pwd;
private
$dbName;
private
$charset;
private
$conn
=
null;
public
function
__construct()
{
$this->host
=
'localhost';
$this->user
=
'root';
$this->pwd
=
'root';
$this->dbName
=
'test';
$this->connect($this->host,$this->user,$this->pwd);
$this->switchDb($this->dbName);
$this->setChar($this->charset);
}
//负责链接
private
function
connect($h,$u,$p)
{
$conn
=
mysql_connect($h,$u,$p);
$this->conn
=
$conn;
}
//负责切换数据库
public
function
switchDb($db)
{
$sql
=
'use'
.
$db;
$this->query($sql);
}
//负责设置字符集
public
function
setChar($char)
{
$sql
=
'set
names'
.
$char;
$this->query($sql);
}
//负责发送sql查询
public
function
query($sql)
{
return
mysql_query($sql,$this->conn);
}
//负责获取多行多列的select结果
public
function
getAll($sql)
{
$list
=
array();
$rs
=
$this->query($sql);
if
(!$rs)
{
return
false;
}
while
($row
=
mysql_fetch_assoc($rs))
{
$list[]
=
$row;
}
return
$list;
}
public
function
getRow($sql)
{
$rs
=
$this->query($sql);
if(!$rs)
{
return
false;
}
return
mysql_fetch_assoc($rs);
}
public
function
getOne($sql)
{
$rs
=
$this->query($sql);
if
(!$rs)
{
return
false;
}
return
mysql_fetch_assoc($rs);
return
$row[0];
}
public
function
close()
{
mysql_close($this->conn);
}
}
echo
'<pre>';
$mysql
=
new
Mysql();
print_r($mysql);
$sql
=
"insert
into
stu
values
(4,'wangwu','99998')";
if($mysql->query($sql)){
echo
"query成功";
}else
{
echo
"失败";
}
echo
"<br
/>";
$sql
=
"select
*
from
stu";
$arr
=
$mysql->getAll($sql);
print_r($arr);
?>
