php - PDO returns integer columns as String in PHP5.4

Question

First of all, I am aware that there are various similar questions on SO such as this and this. However, when I fetch values from a table, integers are always fetched as string.

I am using PHP5.4 (5.4.16-1~dotdeb.1) and MYSQL5.5 (5.5.31+dfsg-0+wheezy1). It is written here that MySQL Native Driver is enabled by default in PHP5.4.0. But I still get string values.

I initialize a PDO object as follows.

try {
        $dsn = 'mysql:host=' . DB_HOST . ';dbname=' . DB_NAME . ';charset=utf8';

        $db = new PDO($dsn,DB_USER,DB_PASS);

        $db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);

        $db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
    } catch (PDOException $e) {
        header('HTTP/1.1 500');
        exit;
    } catch (Exception $e) {
        header('HTTP/1.1 500');
        exit;
    }

When I insert, I tried to use execute(array(...)) format and also used bindValue(...,PDO::PARAM_INT), but they did not make a difference.

For example, here is how I insert a new row.

public function insertList ($db,$account_id,$list_name) {
    $sql = $db->prepare('INSERT INTO lists VALUES (?,?,?,?,?)');

    try {
        // $sql->execute(array($list_name,0,0,0,$account_id));

        $sql->bindValue(1,$list_name,PDO::PARAM_STR);
        $sql->bindValue(2,0,PDO::PARAM_INT);
        $sql->bindValue(3,0,PDO::PARAM_INT);
        $sql->bindValue(4,0,PDO::PARAM_INT);
        $sql->bindValue(5,$account_id,PDO::PARAM_INT);
        $sql->execute();
    } catch (PDOException $e) {
        header('HTTP/1.1 500');
        exit;
    } catch (Exception $e) {
        header('HTTP/1.1 500');
        exit;
    }
}

Here is how I fetch rows from a table

public function fetchLists ($db,$account_id) {
    $sql = $db->prepare('SELECT * FROM lists WHERE account_id=?');

    try {
        $sql->execute(array($account_id));

        $result = $sql->fetchAll(PDO::FETCH_ASSOC);
    } catch (PDOException $e) {
        header('HTTP/1.1 500');
        exit;
    } catch (Exception $e) {
        header('HTTP/1.1 500');
        exit;
    }

    return $result;
}

This did not occur when I tested on XAMPP for Linux 1.8.1 which uses PHP5.4.7. I currently use nginx instead of Apache.

What is wrong?

Answer 1

To get integers and floats with respective types from mysql with PDO, you need both mysqlnd-based PDO-mysql and emulation mode turned off.