SQLite3 class missing createCollation()

Hi I initially sent this to php-db, but I guess it really belongs on internals.. The C API for SQLite3 has an sqlite3_create_collation() feature that's missing from PHP's SQLite3 class API. I'm working on a patch that adds the SQLite3::createCollation(string collation_name, mixed callback) method.  This allows registering a PHP function as a comparator for the database to use while collating data. The callback passed to createCollation() should act like strcmp(), i.e. it should accept two strings and return an integer indicating their relative sort order. e.g. <?php $filenames = array(   'ab1.png',   'ab2.png',   'ab10.png',   'ab11.png',   'ac.png',   'aa.png',   'ab3.png'); $db = new SQLite3(':memory:'); $db->createCollation('NATURAL_SORT', 'strnatcmp'); $db->exec("CREATE TABLE filenames (fname varchar(32));"); $stmt = $db->prepare("INSERT INTO filenames VALUES (?);"); foreach($filenames as $fname){   $stmt->bindParam(1, $fname);   $stmt->execute(); } $result = $db->query("SELECT fname FROM filenames ORDER BY fname COLLATE NATURAL_SORT;"); while($row = $result->fetchArray()){   echo $row['fname'], "\n"; } $db->close(); ?> Output: aa.png ab1.png ab2.png ab3.png ab10.png ab11.png ac.png I've built 5.3.9 with my patch on Ubuntu on x86_64, and it works as expected. I've never submitted a patch for PHP before, so I could use some advice/hand-holding on the process. Thanks, Brad