How Can I Ensure MySQL Integer and Numeric Columns Return as the Correct Data Type in PHP?

Returning Integers and Numerics from MySQL as Integers and Numerics in PHP

Many developers encounter the issue of MySQL queries returning integer and numeric columns as strings in PHP. This is due to the default behavior of the native MySQL driver, which doesn't support returning numeric types.

The Solution: Using the mysqlnd Driver

The solution is to use the mysqlnd driver for PHP. The mysqlnd driver is a more modern and feature-rich driver that provides the ability to return numeric columns as integers and numerics.

Identifying if You're Using mysqlnd

To check if you're using the mysqlnd driver, open up the PHP Information (php -i) page and look under the "PDO Driver for MySQL" section. If it mentions "mysqlnd" there, then you're using the mysqlnd driver. Otherwise, you're most likely using the native MySQL driver.

Installing mysqlnd on Ubuntu

To install the mysqlnd driver on Ubuntu, you can use the command:

sudo apt-get install php5-mysqlnd

Restarting Apache

After installing the mysqlnd driver, you need to restart Apache in order for the changes to take effect.

Verifying the Driver

Once Apache has restarted, you can check again if the mysqlnd driver is being used by opening up the PHP Information page (php -i). It should now mention "mysqlnd" explicitly in the "PDO Driver for MySQL" section.

PDO Settings

Ensure that you have the following PDO settings set to false to prevent potential issues:

$pdo->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$pdo->setAttribute(PDO::ATTR_STRINGIFY_FETCHES, false);

Returned Values

Depending on the database type, different types of data will be returned as follows:

• Floating-point types (FLOAT, DOUBLE) will return as PHP floats.
• Integer types (INTEGER, INT, SMALLINT, TINYINT, MEDIUMINT, BIGINT) will return as PHP integers.
• Fixed-Point types (DECIMAL, NUMERIC) will return as strings.
• BIGINTs with values greater than 9223372036854775807 (on a 64-bit system) will return as strings.

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