本文實例講述了PHP封裝的mysqli數(shù)據(jù)庫操作類。分享給大家供大家參考，具體如下：

由于PHPMySQL操作在PHP5.4以下被棄用而推薦使用mysqli(MySQL Improvement)，這里是在我原有的MySQL數(shù)據(jù)庫操作類的基礎(chǔ)上加以改進而編寫出的MySQLI數(shù)據(jù)庫操作類，整體代碼與MySQL數(shù)據(jù)庫操作類大致相同，直接實例化db_class即可

class db_class{

public $db_url; //連接地址

public $db_username; //連接名

public $db_userpassword; //連接密碼

public $db_name; //數(shù)據(jù)庫名

public $db_tablename; //表名

public $db_conn; //數(shù)據(jù)庫連接

public $db_order;

public $db_limit;

public function db_getconn(){ //連接數(shù)據(jù)庫

$this->db_conn= mysqli_connect($this->db_url,$this->db_username,$this->db_userpassword,$this->db_name);

if (!$this->db_conn)

{

echo "連接 MySQL 失敗: " . mysqli_connect_error();

}

}

public function __construct($db_url,$db_username,$db_userpassword,$db_name){ //構(gòu)造方法賦值

$this->db_url=$db_url;

$this->db_username=$db_username;

$this->db_userpassword=$db_userpassword;

$this->db_name=$db_name;

$this->db_order="";

$this->db_limit="";

$this->db_getconn();

mysqli_query($this->db_conn,'set names utf8');

}

public function db_settablename($db_tablename){ //設(shè)置表名

$this->db_tablename=$db_tablename;

}

public function db_setorder($str){ //排序操作

$this->db_order="order by $str";

}

public function db_setlimit($start,$end){ //分頁操作

$this->db_limit="limit $start,$end";

}

public function db_select($typearr="",$where=""){ //查詢操作

if(empty($typearr)){

$typearr="*";

}

else{

$typearr=implode(",",$typearr);

}

if(empty($where)){

$where="";

}else{

$where="where ".$where;

}

$arr=array();

$sql="select $typearr from $this->db_tablename $where $this->db_order $this->db_limit ";

$result = mysqli_query($this->db_conn,$sql);

while($row = $result->fetch_array()) {

$arr[]=$row;

}

return $arr;

}

public function db_update($typearr,$valuearr,$where=""){ //更新操作

$sql="";

if(empty($where)){

$where="";

}else{

$where=" where ".$where;

}

$sql.="update $this->db_tablename set ";

foreach ($typearr as $key=>$value){

if(count($typearr)-1==$key){

$sql.=$value."='".$valuearr[$key]."'";

}else{

$sql.=$value."='".$valuearr[$key]."'".",";

}

}

$sql.=$where;

mysqli_query($this->db_conn,$sql);

}

public function db_delete($typestr,$valuestr){ //刪除操作

$sql="delete from $this->db_tablename WHERE $typestr=$valuestr";

mysqli_query($this->db_conn,$sql);

}

public function db_insert($typearr,$valuearr){ //插入操作

$sql="insert into $this->db_tablename(".implode(",", $typearr).") values(".implode(",", $valuearr).")";

mysqli_query($this->db_conn,$sql);

}

public function __destruct(){ //析構(gòu)方法關(guān)閉連接

mysqli_close($this->db_conn);

}

}

希望本文所述對大家PHP程序設(shè)計有所幫助。

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