DB.php

<?php

class DB {

    private $host   = 'localhost';
    private $user   = 'root';
    private $pass   = '';
    private $dbname = 'your_db_name';
    private $stmt;
    private $dbh;
    private $error;

    public function __construct()
    {
        // Set DSN
        $dsn = 'mysql:host=' . $this->host . ';dbname=' . $this->dbname;
        // Set options
        $options = array(
            PDO::ATTR_PERSISTENT => true,
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
        );
        // Create a new PDO instanace
        try {
            $this->dbh = new PDO($dsn, $this->user, $this->pass, $options);
        }
        // Catch any errors
        catch (PDOException $e) {
            $this->error = $e->getMessage();
        }
    }

    public function query($query)
    {
        $this->stmt = $this->dbh->prepare($query);
    }

    public function bind($param, $value, $type = null)
    {
        if (is_null($type)) {
            switch (true) {
                case is_int($value):
                    $type = PDO::PARAM_INT;
                    break;
                case is_bool($value):
                    $type = PDO::PARAM_BOOL;
                    break;
                case is_null($value):
                    $type = PDO::PARAM_NULL;
                    break;
                default:
                    $type = PDO::PARAM_STR;
            }
        }
        $this->stmt->bindValue($param, $value, $type);
    }

    public function execute()
    {
        return $this->stmt->execute();
    }

    public function result()
    {
        $this->execute();
        return $this->stmt->fetchAll(PDO::FETCH_OBJ);
    }

    public static function get_results($query)
    {
        $db = new CRUD;
        $db->query($query);
        $db->execute();
        return $db->result();
    }

    public function row($query)
    {
        $db = new CRUD;
        $db->query($query);
        $db->execute();
        return $db->single();
    }

    public function single()
    {
        $this->execute();
        return $this->stmt->fetch(PDO::FETCH_OBJ);
    }

    public function rowCount()
    {
        return $this->stmt->rowCount();
    }

    public function lastInsertId()
    {
        return $this->dbh->lastInsertId();
    }

    public function beginTransaction()
    {
        return $this->dbh->beginTransaction();
    }

    public function endTransaction()
    {
        return $this->dbh->commit();
    }

    public function cancelTransaction()
    {
        return $this->dbh->rollBack();
    }

    public function debugDumpParams()
    {
        return $this->stmt->debugDumpParams();
    }
}