【小结】有关mysql扩展库和mysqli扩展库的crud操作封装

header("Content-type:text/html;charset=utf-8");
	class Sqlitool{
		private $mysqli;

		private static $host="localhost";
		private static $user="root";
		private static $pwd=123456;
		private static $db="test";

		public function __construct(){
			$this->mysqli=new mysqli(self::$host,self::$user,self::$pwd,self::$db);
			if($this->mysqli->connect_error){
				die("链接失败".$this->mysqli->connect_error);
			}

			//设置访问数据库的字符集
			$this->mysqli->query("set names utf8");
		}
		public function execute_dql($sql){
			$res=$this->mysqli->query($sql) or die("操作失败".$this->mysqli->error);
				return $res;
		}
		public function execute_dml($sql){
			$res=$this->mysqli->query($sql) or die("操作失败".$this->mysqli->error);
			if(!$res){
				return 0;  //操作失败
			}else{
				if($this->mysqli->affected_rows>0){
					return 1;// 表示成功
				}else{
					return 2;// 表示没有行收到影响
				}
			}
		}

	}

header("Content-type:text/html;charset=utf-8");<br>class sqltool{
		private $con;
		private $host="localhost";
		private $user="root";
		private $password=123456;
		private $db="test";

		//构造函数 初始化数据库操作链接和设置字符集
		function sqltool(){
			$this->con=mysql_connect($this->host,$this->user,$this->password);

			if(!$this->con){
				die("链接数据库错误".mysql_error());
			}
			mysql_select_db($this->db,$this->con);
			mysql_query("set names utf8");

		}
		//完成查询任务呀
		
		public function exeute_dql($sql){
			$res=mysql_query($sql) or die(mysql_error());
			return $res;
		}
	
		
		//表示insert update delete
		public function exeuct_dml($sql){
			$b=mysql_query($sql,$this->con) or die(mysql_error());
			if(!$b){
				return 0;//失败
			}else{
				if(mysql_affected_rows($this->con)>0){
					return 1;//表示成功
				}
				else{
					return 2;//表示没有行数受影响
				}
			
			}
		}<br>}