首先封裝好mysql類

mysql.php

class Mysql{

private static $host="localhost";

private static $user="root";

private static $password="123456";

private static $dbName="test"; //數(shù)據(jù)庫名

private static $charset="utf8"; //字符編碼

private static $port="3306"; //端口號(hào)

private $conn=null;

function __construct(){

$this->conn=new mysqli(self::$host,self::$user,self::$password,self::$dbName,self::$port);

if(!$this->conn)

{

die("數(shù)據(jù)庫連接失敗！".$this->conn->connect_error);

}else{

echo "連接成功！";

}

$this->conn->query("set names ".self::$charset);

}

//執(zhí)行sql語句

function sql($sql){

$res=$this->conn->query($sql);

if(!$res)

{

echo "數(shù)據(jù)操作失敗";

}

else

{

if($this->conn->affected_rows>0)

{

return $res;

}

else

{

echo "0行數(shù)據(jù)受影響！";

}

}

}

//返回受影響數(shù)據(jù)行數(shù)

function getResultNum($sql){

$res=$this->conn->query($sql);

return mysqli_num_rows($res);

}

//關(guān)閉數(shù)據(jù)庫

public function close()

{

@mysqli_close($this->conn);

}

}

?>

然后就可以調(diào)用了

index.php

require_once "mysql.php";

$conn=new Mysql();

$sql="select * from user";

//執(zhí)行查詢并獲取查詢結(jié)果

$result=$conn->sql($sql);

//輸出受影響數(shù)據(jù)行數(shù)

$num=$conn->getResultNum($sql);

echo "影響的行數(shù)：".$num;

//讀取并輸出記錄

while ($row = mysqli_fetch_assoc($result))

{

echo "{$row['name']} ";

echo "{$row['password']}";

}

//關(guān)閉數(shù)據(jù)庫

$conn->close();

總結(jié)

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