<?php

class AcessDataPDO{

	private  $driver;
	private  $user;
	private  $password;
	private  $option;

	protected $PDOconnection;

	private function beginConnection(){

		try {
				$this->PDOconnection = new PDO($this->driver, $this->user, $this->password, $this->option);
		} catch (Exception $e) {
			$tag = ' <script type="text/javascript">';
			$tag += "alert(\"";
			$tag += $e->getFile()." - Na Linha ".$e->getLine()." # ".$e->getMessage()."\")";
			$tag += '</script>';
			echo $tag;
		}

	}

	public function __construct(){
		require_once 'Configurador.class.php';
		$conf = new Configurador();

		$this->driver = $conf->driver;
		$this->user = $conf->user;
		$this->password = $conf->password;
		$this->option = $conf->option;

		$this->beginConnection();

	}

	public  function __construct($driver,$user,$password,$option){
		$this->driver = $driver;
		$this->user = $user;
		$this->password = $password;
		$this->option = $option;

		$this->beginConnection();
	}

	private function query($type, $expression){
		if( $type == "INSERT"){
			if ($this->PDOconnection->query($expression)){
				return true;
			}else{
				return false;
			}

		}elseif ( $type == "UPDATE"){
		if ($this->PDOconnection->query($expression)){
				return true;
			}else{
				return false;
			}
		}elseif ($type == "DELETE"){
		if ($this->PDOconnection->query($expression)){
				return true;
			}else{
				return false;
			}

		}elseif ($type == "SELECT"){
			if ($resultSet = $this->PDOconnection->query($expression)){
				$answer = $resultSet->fetchObject();
				return $answer;
			}else{
				return false;
			}
		}
	}

	public function select($columns,$table,$condition){
		$expression = "SELECT $coulmns FROM $table ";
		if($condition != null){
			$expression += "WHERE $condition";
		}
		return $this->query("SELECT", $expression);
	}

	public function insert($table,$values,$condition){
		$expression = "INSERT INTO $table VALUES ($values) ";
		if($condition != null){
			$expression += "WHERE $condition";
		}
		return $this->query("INSERT", $expression);
	}

	/**
	 *
	 * Enter description here ...
	 * @param $columnsSet - coluna tem de ser um array
	 * @param $table
	 * @param $condition
	 */
	public function update($columnsSet,$table,$condition){
		if(is_array($columnsSet)){
			$expression = "UPDATE $table SET";
			foreach ($columnsSet as $k => $v)
			 	$expression += " $k = $v";
			if($condition != null){
				$expression += "WHERE $condition";
			}
			return $this->query("UPDATE", $expression);
		}
		return false;
	}


	public function delete($table,$condition){
		$expression = "DELETE FROM $table ";
		if($condition != null){
			$expression += "WHERE $condition";
		}
		return $this->query("DELETE", $expression);
	}

	private function __destruct(){
		$this->PDOconnection = null;
	}
}

eu li alguns tutoriais e visando as minhas necessidades pra criar um projeto escolar simples!
A pergunta q eu faço é se o fato se essa classe é mais "inteligente" ou profissional do que
a seguinte classe!

<?php

class AcessDataPDO{

	private  $driver;
	private  $host;
	private  $user;
	private  $password;
	private  $dataBase;
	private  $option;
	private  $port;

	protected $PDOconnection;

	private function beginConnection(){

		try {
				$this->PDOconnection = new PDO($this->driver, $this->user, $this->password, $this->option);
		} catch (Exception $e) {
			$tag = ' <script type="text/javascript">';
			$tag += "alert(\"";
			$tag += $e->getFile()." - Na Linha ".$e->getLine()." # ".$e->getMessage()."\")";
			$tag += '</script>';
			echo $tag;
		}

	}

	public function __construct(){
		require_once 'Configurador.class.php';
		$conf = new Configurador();

		$this->driver = $conf->driver;
		$this->user = $conf->user;
		$this->password = $conf->password;
		$this->option = $conf->option;

		$this->beginConnection();

	}

	public  function __construct($driver,$user,$password,$option){
		$this->driver = $driver;
		$this->user = $user;
		$this->password = $password;
		$this->option = $option;

		$this->beginConnection();
	}

	public function query($type, $expression){
		if( $type == "INSERT"){
			if ($this->PDOconnection->query($expression)){
				return true;
			}else{
				return false;
			}

		}elseif ( $type == "UPDATE"){
		if ($this->PDOconnection->query($expression)){
				return true;
			}else{
				return false;
			}
		}elseif ($type == "DELETE"){
		if ($this->PDOconnection->query($expression)){
				return true;
			}else{
				return false;
			}

		}elseif ($type == "SELECT"){
			if ($resultSet = $this->PDOconnection->query($expression)){
				$answer = $resultSet->fetchObject();
				return $answer;
			}else{
				return false;
			}
		}
	}


	private function __destruct(){
		$this->PDOconnection = null;
	}
}