note 105474 added to book.spl

There are many places in the manual where SPL documentation reads "this is undocumented" or "description here" ( note CachingIterator constants http://www.php.net/manual/en/class.cachingiterator.php ). This page helps explain some things, http://www.phpro.org/tutorials/Introduction-to-SPL.html but I don't know how accurate it is, when it was written, or if it's even all that good. I'm just not familiar enough with SPL to know. I'm leaving the link to phpro because there are things written on that page that seem to work, but aren't in the documentation here. ---- Server IP: 69.147.83.197 Probable Submitter: 68.41.94.241 ---- Manual Page -- http://www.php.net/manual/en/book.spl.php Edit -- https://master.php.net/note/edit/105474 Del: integrated -- https://master.php.net/note/delete/105474/integrated Del: useless -- https://master.php.net/note/delete/105474/useless Del: bad code -- https://master.php.net/note/delete/105474/bad+code Del: spam -- https://master.php.net/note/delete/105474/spam Del: non-english -- https://master.php.net/note/delete/105474/non-english Del: in docs -- https://master.php.net/note/delete/105474/in+docs Del: other reasons-- https://master.php.net/note/delete/105474 Reject -- https://master.php.net/note/reject/105474 Search -- https://master.php.net/manage/user-notes.php