Why Are My MySQL Integer Values Retrieved as Strings in PDO, and How Can I Fix It?

Troubleshooting Non-Numeric Data Retrieval in MySQL Using PDO

When querying MySQL databases with PDO, you may encounter situations where integer values are retrieved as strings instead of numeric types. Despite attempts to modify the PDO::ATTR_STRINGIFY_FETCHES attribute, an error appears indicating that it is not supported by the MySQL driver. This issue arises because the MYSQLND driver, introduced in PHP 5.3, handles data type conversion differently compared to other drivers.

To resolve this, we need to disable PDO's prepared statement emulation feature. This can be done by setting the PDO::ATTR_EMULATE_PREPARES attribute to false when creating the PDO object:

new PDO($dsn, $user, $pass, array(
    PDO::ATTR_EMULATE_PREPARES => false
))

When prepared statements are used, MYSQLND will convert numeric database values to their native PHP types, allowing you to directly work with integers instead of strings. It is important to note that PDO::ATTR_STRINGIFY_FETCHES is not applicable to the MySQL driver. By switching off emulation, we ensure that numeric data types are handled correctly, eliminating the need for additional string conversions.

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