<?php

include 'config/mysql.php';

class myClass
{
        private static $PDO = NULL;
        private static $tbl = 'questions';

        public function selectNum()
        {
                $sql = 'SELECT * FROM ' . self::$tbl . 'WHERE used = 0';
                echo $sql;

        }

        private function _select( $sql )
        {
                if ( !self::$PDO ) die( mysql_error(). 'No database connection.' );
                $stmt = self::$PDO->query( $sql );

                if ( $stmt && $stmt->rowCount() < 4 )
                {
                        echo "your row count is less than 4";
                }
                else
                {
                        echo "your row count is not less than 4";
                }
        }