链式调用封装MySQL类-PHP源码

host=$server;
		$this->name=$dbuser;
		$this->password=$psw;
		$this->link=@mysql_connect($this->host,$this->name,$this->password) or die(&＃39;ERROR: 数据库主机连接失败！
&＃39;);
		$this->runStat="init";//定义为初始化
		$this->fn=0;
	}
	
	public function to2DArray(){//构造二维数组
		/////////////检测//////////////////
		if(!is_resource($this->value)){
			array_push($this->errlog, "ERROR: 运行错误，在to2DArray层调用错误的方法
");
			$this->runStat="error";//将运行状态设置为错误
			return $this;
		}
		$this->runStat="to2DArray";
		/////////////////////////////////////
		$_2DArray=Array();
		while($row=@mysql_fetch_array($this->value)){//直接取value值，此时的value应当为resource类型
			$keyarr=array_keys($row);
			foreach ($keyarr as $key) {
				if (is_int($key)) {
					unset($row[$key]);//去掉以数组为键名的数组元素
				};
			}
			array_push($_2DArray, $row);
		}
		$this->value=$_2DArray ;
		return $this;
	}
	
	public function db($database,$charset){//连接数据库
		/////////////检测//////////////////
		if(!is_resource($this->link)){
			array_push($this->errlog, "ERROR: 运行错误，在db层调用错误的方法
");
			$this->runStat="error";//将运行状态设置为错误
			return $this;
		}
		$this->runStat="db";
		/////////////////////////////////////
		$this->dbname=$database;
		mysql_query("set names ".$charset);//设置字符集
		$this->value=mysql_select_db($this->dbname,$this->link);
		if (!$this->value) {
			echo "ERROR:打开数据库错误！
";
			$this->runStat="error";
		}
		return $this;
	}
	public function query($sql) {
		/////////////检测//////////////////
		if(!is_string($sql)){
			array_push($this->errlog,"ERROR: 运行错误，在query层调用错误的方法
");
			$this->runStat="error";//将运行状态设置为错误
			return $this;
		}
		$this->runStat="query";
		/////////////////////////////////////
		$sql=addslashes($sql);//防注入
		$result=mysql_query($sql);
		if (!$result) {
			array_push($this->errlog,"ERROR: 语句运行错误！
");
			$this->runStat="sqlerror";
		}
		$this->value=$result;
		return $this;
	}
	
	function value() {
		$this->runStat="init";
		if ($this->errreport) {
			foreach ($this->errlog as $value) {
				echo $value;
			}
		}
		$this->errlog=array();//clean
		$result=$this->value;
		$this->value=null;//clean
		return $result;
	}
	public function __call($f,$v){//错误方法吸收
		echo "ERROR: 不存在".$f."()方法. 
";
		return $this;
	}
}
$db=new MySQL("localhost", "root", "lijun");
//$db->errreport=false;
$h=$db->db("students", &＃39;utf8&＃39;);
var_dump($db->db("ip", &＃39;utf8&＃39;)->to2DArray()->query("select * from ip limit 0,2")->to2DArray()->value());
var_dump($h->query("seslect * from nuser limit 10,2")->to2DArray()->value());
var_dump($db->db("ip", &＃39;utf8&＃39;)->query("SELECT * FROM ip LIMIT 0 , 2")->to2DArray()->value());

?>