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moxio/sqlite-extended-api

Exposes SQLite APIs that are otherwise not available in PHP. You can connect to an SQLite database as you normally would using PHP's PDO extension, then use this library to call SQLite API methods that PDO does not offer (e.g. loading extensions).

Warning: under the hood, this library makes use of Z-Engine, which proclaims itself not ready for production until version 1.0.0. Use it at your own risk.

Requirements

This library requires PHP version 7.4 or higher with the FFI extension enabled. It only works with x64 non-thread-safe builds of PHP.

Installation

Install as a dependency using composer:

$ composer require moxio/sqlite-extended-api

Usage

If you have an existing PDO connection to an SQLite database, you can use the wrapPDO() static method on the Facade class to obtain access to extra SQLite APIs:

<?php
use Moxio\SQLiteExtendedAPI\Facade;

// Existing PDO connection
$pdo = new \PDO('sqlite::memory:');

// Wrap it using this library
$wrapped_connection = Facade::wrapPDO($pdo);

// Call extended APIs on the wrapped connection object
$wrapped_connection->loadExtension('mod_spatialite.so');

See the next section for methods available on the wrapped connection.

Exposed APIs

Below is a short overview; see WrappedConnection for details.

Loading SQLite extensions

Load additional SQLite extension libraries using loadExtension($shared_library):

$wrapped_connection->loadExtension('mod_spatialite.so');

This corresponds to the loadExtension method in PHP's SQLite3 extension, or [sqlite3_load_extension](https://sqlite.org/c3ref/load_extension.html) in the SQLite C interface. Returns true` if the extension was successfully loaded, false if it was not.

Obtaining the database filename

To obtain the full disk path of the database connected to, use getDatabaseFilename():

var_dump($wrapped_connection->getDatabaseFilename());

For an in-memory database, this returns an empty string.

How does this work?

In short: we use the awesome Z-Engine project by Alexander Lisachenko and PHP's Foreign Function Interface (FFI) to resolve your PHP variable to the raw connection pointer for the SQLite C API, then call that C API using FFI.

More details can be found in this blog post.

Versioning

This project adheres to Semantic Versioning.

Contributing

Contributions to this project are more than welcome. If there are other SQLite APIs that you would like to be able to use in PHP, feel free to send a PR or to file a feature request.

License

This project is released under the MIT license.

Treeware

This package is Treeware. If you use it in production, then we'd appreciate it if you buy the world a tree to thank us for our work. By contributing to the Treeware forest you'll be creating employment for local families and restoring wildlife habitats.

Made with love, coffee and fun by the Moxio team from Delft, The Netherlands. Interested in joining our awesome team? Check out our vacancies (in Dutch).