<?php
class Wxk
{
	public $host="localhost";
	public $uid="root";
	public $pwd="123";
	public $dbname="Wxk";
	//執行SQL語句返回相應的結果
	//$sql 要執行的SQL語句
	//$type 代表SQL語句的類型，0代表增刪改 1代表查詢
	function query($sql,$type=1)
			{
				$db= new MySQLi($this->host,$this->uid,$this->pwd,$this->dbname);
				$result= $db -> query($sql);
				if($type)
				{	
					//如果是查詢，返回數據
					return $result->fetch_all();
				}
				else
				{
					//如果是增刪改，返回true或false
					return $result;
				}
			}
		
	function strquery($sql,$type=1)
		{
			$db= new MySQLi($this->host,$this->uid,$this->pwd,$this->dbname);
			$arry= $db -> query($sql);
			$arr =$arry->fetch_all();
			$str = "";//定義一個空的字符串
			foreach($arr as $v)
			{
				$str = $str.implode("-",$v)."|";//數組拼接字符串
			}
			$result = substr($str,0,strlen($str)-1);//刪除多余的“|”
			return $result;//返回字符串
		}
}

數據訪問類封裝