Die Klasse PDOStatement

I don't know why PDOStatement don't return "execution time" and "found rows" so here I created an extended class of PDOStatement with these attributes.Just have to "setAttribute" of PDO's object to $PDO->setAttribute(\PDO::ATTR_STATEMENT_CLASS , ['\customs\PDOStatement', [&$this]]);<?php/******/namespace customs;/******/final class PDOStatement extends \PDOStatement {    /**    *    *    *    */    protected $PDO = null;    protected $inputParams = [];    protected $executionTime = 0;    protected $resultCount = 0;    /**    *    *    *    */    protected function __construct(PDO &$PDO) {        $this->PDO = $PDO;        $this->executionTime = microtime(true);    }    /**    *    *    *    */    final public function getExecutionError(int $i = 2) {        $executionError = $this->errorInfo();        if (isset($executionError[$i]))            return $executionError[$i];        return $executionError;    }    /**    *    *    *    */    final public function getExecutionTime($numberFormat = false, $decPoint = '.', $thousandsSep = ',') {        if (is_numeric($numberFormat))            return number_format($this->executionTime, $numberFormat, $decPoint, $thousandsSep);                return $this->executionTime;    }    /**    *    *    *    */    final public function getResultCount($numberFormat = false, $decPoint = '.', $thousandsSep = ',') {        if (is_numeric($numberFormat))            return number_format($this->resultCount, $numberFormat, $decPoint, $thousandsSep);                return $this->resultCount;    }    /**    *    *    *    */    final public function getLastInsertId() {        return $this->PDO->lastInsertId();    }    /**    *    *    *    */    final public function bindValues(array $inputParams) {        foreach ($this->inputParams = array_values($inputParams) as $i => $value) {            $varType = is_null($value) ? \PDO::PARAM_NULL : is_bool($value) ? \PDO::PARAM_BOOL : is_int($value) ? \PDO::PARAM_INT : \PDO::PARAM_STR;            if (!$this->bindValue(++ $i, $value, $varType))                return false;        }        return true;    }    /**    *    *    *    */    final public function execute($inputParams = null) {        if ($inputParams)            $this->inputParams = $inputParams;        if ($executed = parent::execute($inputParams))            $this->executionTime = microtime(true) - $this->executionTime;        return $executed;    }    /**    *    *    *    */    final public function fetchAll($how = null, $className = null, $ctorArgs = null) {        $resultSet = parent::fetchAll(... func_get_args());        if (!empty($resultSet)) {            $queryString = $this->queryString;            $inputParams = $this->inputParams;            if (preg_match('/(.*)?LIMIT/is', $queryString, $match))                $queryString = $match[1];            $queryString = sprintf('SELECT COUNT(*) AS T FROM (%s) DT', $queryString);            if (($placeholders = substr_count($queryString, '?')) < count($inputParams))                $inputParams = array_slice($inputParams, 0, $placeholders);            if (($sth = $this->PDO->prepare($queryString)) && $sth->bindValues($inputParams) && $sth->execute())                $this->resultCount = $sth->fetchColumn();                            $sth = null;        }        return $resultSet;    }}?>

I think I found a way to execute a protected SQL query and at the same time find out the number of affected records.I have the table 'tbl_users' with the following fields: id, login, password, age<?const DB_DRIVER = "mysql";const DB_HOST = "localhost";const DB_NAME = "my_db_name";const DB_LOGIN = "root";const DB_PASS = "root"; //OpenServer.$connectionString = DB_DRIVER.':host='.DB_HOST.';dbname='.DB_NAME;try{    //Connect to database.    $db = new PDO($connectionString, DB_LOGIN, DB_PASS);}catch(PDOException $e){    die("Error: ".$e->getMessage());}$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);try{        //Decreasing age for user 'nick1'.    $prep1 = $db->prepare("UPDATE tbl_users SET age=age-1 WHERE login='nick1'");    //Increasing age for user 'nick2'.    $prep2 = $db->prepare("UPDATE tbl_users SET \r\n age=age+1 WHERE login='nick2'");    //Start transaction.    $db->beginTransaction(); //Table type must be InnerDB!    //We assume that everything will be fine.    $flagDone = true;     //The exec() method returns the number of rows affected by the query.    //$prep1->queryString is already an escaped SQL string.    $result = $db->exec($prep1->queryString);    if($result==false || $result!=1) //var_dump($result) - int(1) or bool(false).        $flagDone = false;    $result = $db->exec($prep2->queryString);    if($result==false || $result!=1)        $flagDone = false;    if($flagDone)    {        if($db->commit())            echo "Transaction was successful";    }            else{            echo "Transaction fail";            $db->rollback();    }    echo "<br>";}catch(PDOException $e){    die("Error: ".$e->getMessage());}