PHP is about to make a new "minor" revision bump, from 5.3 to 5.4. This will remove some long standing security problems like register_globals, and add some advanced new features like Traits. The 5.3 series, meanwhile, will be coming to an end sometime sooner than the end of 12.04's 5 year supported cycle. In the interest of shipping an advanced but stable LTS, we should consider shipping 5.4.0 as the PHP version in 12.04 rather than 5.3.9.