php连接Mysql的增删改查操作

<?php  

$conn=mysql_connect('localhost','root','');  

if(!$conn){  

echo "connect failed";  

exit;  

}  

  

$sql='use student';

mysql_query($sql,$conn);

  

//增加  

$sql="insert into student(sname,sage) values('pu','20')";  

$rs=mysql_query($sql,$conn);  

if($rs){  

    echo 'insert data success'."<br />";  

}else{  

    echo 'insert data failed'."<br />";  

}  

  

//修改  

$sql="update student set sname='fu' where sname='pu'";  

$rs=mysql_query($sql,$conn);  

if($rs){  

    echo 'update data success'."<br />";  

}else{  

    echo 'update data failed'."<br />";  

}  

  

//删除  

$sql="delete from student where sname='li'";  

$rs=mysql_query($sql,$conn);  

if($rs){  

    echo 'del data success'."<br />";  

}else {  

    echo 'del data failed'."<br />";    

}  

  

//查询  

$sql="select * from student";  

$rs=mysql_query($sql,$conn);  

//打印变量的相关信息  

var_dump($rs);  

//遍历从结果集中取行 mysql_fetch_array/assoc/row/object  

while($row=mysql_fetch_object($rs)){  

print_r($row);  

echo '   ';  

echo $row->sname;  

echo "<br />";  

}  

?>