PHP PDO ile DB Class Helper

<?php

class dbHelper {

    private $pdo;

    function __construct() {
        global $settings;

        try {
            $this->pdo = new PDO("mysql:host={$settings["server"]};
                dbname={$settings["db_name"]}", "{$settings["user"]}", "{$settings["password"]}",

                array(
                    PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
                     PDO::MYSQL_ATTR_INIT_COMMAND => "SET NAMES utf8",
                     PDO::MYSQL_ATTR_FOUND_ROWS => true
                    )
                );

        } catch(PDOException $ex) {
            die('Veritabani Baglantisi Saglanamadi... <br />Hata: ' . $ex -> getMessage());
        }
    }

    public function delete($table, $where, $id) {
        try {
        $data = array($id);
        $sel = $this -> pdo -> prepare("Delete from $table where $where=?");
        $sel -> execute($data);

            return array("success" => true, "msg" => ("Silindi..."));
        } catch(PDOException $x)
        {
            return array("success" => false, "msg" => $x->getMessage());
        }
    }


    public function update($table, $dat, $id, $val) {
        if ($dat !== null)
            $data = array_values($dat);
        array_push($data, $val);
        //grab keys
        $cols = array_keys($dat);
        $mark = array();
        foreach ($cols as $col) {
            $mark[] = $col . "=?";
        }
        $im = implode(', ', $mark);
        $ins = $this -> pdo -> prepare("UPDATE $table SET $im where $id=?");
        $ins -> execute($data);
    }

    public function update2($table, $data, $where=array()) {

       
        if(!empty($where)) {
            $whereOutput = implode(' AND ', array_map(
                function ($v, $k) { return sprintf("%s=:%s", $k, $k); },
                $where,
                array_keys($where)
            ));
        }

        $dataOutput = implode(', ', array_map(
            function ($v, $k) { return sprintf("%s=:%s", $k, $k); },
            $data,
            array_keys($data)
        ));

        $data = array_merge($data,$where);
       
        foreach($data as $k => $v) {
            $data[":".$k] = trim($v);
            unset($data[$k]);
        }

        $sqlText= "UPDATE $table SET $dataOutput ";

        if(!empty($where)) {
            $sqlText .=" WHERE $whereOutput ";
        }
       
    //    $result = array("sql" => $sqlText, "data" => $data);

        $ins = $this -> pdo -> prepare($sqlText);
        $ins -> execute($data);
        return $ins->rowCount() >0 ? true : false ;

    }

    public function delete2($table,  $where=array()) {

       
        if(!empty($where)) {
            $whereOutput = implode(' AND ', array_map(
                function ($v, $k) { return sprintf("%s=:%s", $k, $k); },
                $where,
                array_keys($where)
            ));
        }

        $data = $where;
       
        foreach($data as $k => $v) {
            $data[":".$k] = $v;
            unset($data[$k]);
        }

        $sqlText= "DELETE FROM $table";

        if(!empty($where)) {
            $sqlText .=" WHERE $whereOutput ";
        }
       
        $result = array("sql" => $sqlText, "data" => $data);

        $ins = $this -> pdo -> prepare($sqlText);
        $ins -> execute($data);
        return $ins->rowCount() >0 ? true : false ;
    }  

   
    public function get_all($table,  $where=array(),$type="array") {

       
        if(!empty($where)) {
            $whereOutput = implode(' AND ', array_map(
                function ($v, $k) { return sprintf("%s=:%s", $k, $k); },
                $where,
                array_keys($where)
            ));
        }

        $data = $where;
       
        foreach($data as $k => $v) {
            $data[":".$k] = $v;
            unset($data[$k]);
        }

        $sqlText= "SELECT * FROM $table";

        if(!empty($where)) {
            $sqlText .=" WHERE $whereOutput ";
        }
       
        //return $result = array("sql" => $sqlText, "data" => $data);

        $ins = $this -> pdo -> prepare($sqlText);
        $ins -> execute($data);
        if($type=="array") {
            return $ins->fetchAll(PDO::FETCH_ASSOC);
        }
        if($type=="class") {
            return $ins->fetchAll(PDO::FETCH_CLASS);
        }
    }      

    public function get($table,  $where=array(),$type="array") {

       
        if(!empty($where)) {
            $whereOutput = implode(' AND ', array_map(
                function ($v, $k) { return sprintf("%s=:%s", $k, $k); },
                $where,
                array_keys($where)
            ));
        }

        $data = $where;
       
        foreach($data as $k => $v) {
            $data[":".$k] = $v;
            unset($data[$k]);
        }

        $sqlText= "SELECT * FROM $table";

        if(!empty($where)) {
            $sqlText .=" WHERE $whereOutput ";
        }
       
        //return $result = array("sql" => $sqlText, "data" => $data);

        $ins = $this -> pdo -> prepare($sqlText);
        $ins -> execute($data);
        if($type=="array") {
            return $ins->fetch(PDO::FETCH_ASSOC);
        }
        if($type=="class") {
            return $ins->fetch(PDO::FETCH_CLASS);
        }
    }      

    public function insert($table, $dat) {
        if ($dat !== null)
            $data = array_values($dat);
        //grab keys
        $cols = array_keys($dat);
        $col = implode(', ', $cols);
        //grab values and change it value
        $mark = array();
        foreach ($data as $key) {
            $keys = '?';
            $mark[] = trim($keys);
        }
        $im = implode(', ', $mark);
        $ins = $this -> pdo -> prepare("INSERT INTO $table ($col) values ($im)");
        $ins -> execute($data);
        return $this->pdo -> lastInsertId();
    }

    public function fetch_all($table)
    {
        $sel = $this->pdo->prepare("SELECT * FROM $table");
        $sel->execute();

        return $sel->fetchAll(PDO::FETCH_ASSOC);
    }

    public function fetch($table)
    {
        $sel = $this->pdo->prepare("SELECT * FROM $table");
        $sel->execute();

        return $sel->fetch(PDO::FETCH_ASSOC);
    }

    public function query($sorgu)
    {
        $sel = $this->pdo->query($sorgu);
        return $sel;
    }

    public function prepare($sorgu)
    {
        $sel = $this->pdo->prepare($sorgu);
        return $sel;
    }

    public function count($table)
    {
        $sel = $this->pdo->query("Select Count(*) FROM $table");
        return $sel->fetchColumn();
    }

    public function __destruct() {
        $this -> pdo = null;
    }



}

?>

$settings = array(

    "server" => "localhost",
    "user" => "root",
    "password" =>"",
    "db_name" => "cafe"

);
include "dbHelper.php";
$db = new dbHelper();
$veriler = $db->get_all( array("KategoriID" => 5, "MarkaID" => 5) );