PHP : Short Active Record

short_ar.php

public function updateOrder($data = array())
        {
            $sql = 'UPDATE `user` SET ';
            foreach ($data as $key => $value) {
                if(is_numeric($value)){
                    $sql .= "`$key` = $value,";
                }else{
                    $sql .= "`$key` = '$value',";
                }
            }
            $sql = substr($sql, 0, -1);
            $sql .= ' WHERE id = ?';

            $sth = $this->dbh->prepare($sql);
            $sth->execute(array($this->id));
        }