Solved: could not find driver (SQL: PRAGMA foreign_keys = ON;)

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SQL is a universal language for handling databases, extremely widespread in today’s digital era. But sometimes, developers can encounter issues. One common problem a developer can face is the “Could not find driver (SQL: PRAGMA foreign_keys = ON;)” error. This error usually occurs due to the lack of the right driver for the database connection.

How to Solve ‘Could not find driver (SQL: PRAGMA foreign_keys = ON;)’

The solution to this problem is relatively straightforward. It usually entails installing the right SQLite driver required to communicate with your SQLite database. In PHP, for instance, this means you should have the extension=pdo_sqlite directive either compiled into PHP or added in the php.ini file.

The first step to check if the driver is already installed is to use the getAvailableDrivers() function.


If this function doesn’t include ‘sqlite’, it indicates you need to install the SQLite driver for your PHP install.

Step-by-step Guide to Solve the Issue

1. Open the PHP’s configuration file php.ini, which is usually found in your PHP install folder.
2. Scroll or search down in the php.ini file to find the line ‘;extension=php_pdo_sqlite.dll’.
3. Uncomment this line by removing the semicolon (‘;’) at the start of the line.
4. Save and close the php.ini file.
5. Restart your webserver.

After you’ve done this, ‘sqlite’ should now appear when you run the getAvailableDrivers() function. This means your PHP install can now communicate with sqlite databases, and the “Could Not Find Driver (SQL: PRAGMA foreign_keys = ON;)” error should be resolved.

Entities Associated With This issue

There are several entities associated with this error apart from the SQLite driver. Firstly, there’s the PHP Data Objects (PDO) extension – a database abstraction layer providing a uniform method of access to multiple databases.

It’s important to understand these entities as it can give you further insight into the inner workings of PHP and SQL and identify why certain errors such as “Could Not Find Driver (SQL: PRAGMA foreign_keys = ON;)” occur.

  • PDO: This is the PHP Data Objects, which defines a lightweight and consistent interface for accessing databases in PHP. It can theoretically connect to any database, provided the correct driver is installed, which is where our SQLite driver comes in.
  • SQLite: This is a relational database management system that’s embedded into the end program. It’s a popular choice for local/client storage in web browsers.
  • PRAGMA: This is a command used in SQLite that acts like a method to both query the database about how it should handle certain tasks.

By understanding these components, you can have a clearer picture of how different programs interact and how to better troubleshoot when issues arise.

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