This is the old SQLite2 extension, SQLite3 is the current SQLite driver for PHP 5.3+ and is included by default.
The SQLite extension is enabled by default as of PHP 5.0. Beginning with PHP 5.4, the SQLite extension is available only via PECL.
This is the old SQLite2 extension, SQLite3 is the current SQLite driver for PHP 5.3+ and is included by default.