http://www.php.net/manual/en/sqlite.installation.php
Beginning with PHP 5.4, this extension is available only via PECL.
http://pecl.php.net/package/SQLite
This package is not maintained anymore and has been superseded.
So, how am I supposed to get SQLite on PHP?
I guess downgrading to PHP 5.3 would work, but is that wise?
From the release announcement:
Hence you should be converting your code to use sqlite3. There's a crude shim for the procedural API in the comments here.