Does php.net site have a page to list deprecated functions as of prior version? E.g. Function blah is deprecated as of 5.4 blah?
Each minor version release gets a “Migration Guide”, which details all of the changes between consecutive versions; including deprecated features, backwards incompatible changes, new functions, and so on.
For example, the migration guide moving from PHP 5.3 to PHP 5.4 is at http://www.php.net/manual/en/migration54.php