Basic closure examples (doc bug #61857)

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@335191 c90b9560-bf6c-de11-be94-00142212c4b1
Added docs for MongoDate::toDateTime.


git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@335192 c90b9560-bf6c-de11-be94-00142212c4b1