Copyright Question

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Hello,

My name is Ryan Cantalupo.  I wanted to inquire regarding copying and/or
paraphrasing portions of information from the PHP Manual, in a
commercial/corporate setting.  For example, in describing a fix for a
problem, I made mention of the php functions empty() and isset(), and in
that mentioning I described how those functions worked by
paraphrasing/rewording or copying parts of the descriptions of those
functions from the PHP manual (http://php.net/manual/en/function.isset.php
and http://php.net/manual/en/function.empty.php). There were a couple of
comments/descriptions I wrote that mentioned these functions, and in some
areas I put the two URLs I pasted in above to specify where I got that
information. Since the Creative Commons Attribution 3.0 License requires
more information than what I put, I was wondering how best to properly
attribute the information I wrote? (There is an example further down)
The descriptions I had written are not available to the general public or
distributed within a product as far as I am aware, but are available to be
seen by coworkers of mine.

An example of one of my comments/descriptions:
From http://php.net/manual/en/function.isset.php and
http://php.net/manual/en/function.empty.php, isset() returns True if the
variable exists (probably if it has been declared) and if it has a non-NULL
value. The empty() function returns True if the variable either does not
exist, has a value of NULL, "" (empty string), 0 as an integer, float
(0.0), or string/character ('0'), or FALSE, is an empty array, or is
declared but not initialized (no value). If the variable is both set and
empty (exists and falls into one of the above categories other than NULL),
....


I don't believe I have the ability to edit every comment/description
previously written, but would it be acceptable if I created a new
comment/description that addresses those prior ones that may not be able to
be edited and post the proper attribution?

If there are other areas in which I discover I did a similar thing, whether
in code or in comments/descriptions outside of code like the above example,
should I approach posting attributions in the same manner as I should
approach the above example?

Also, are there cases where a statement is general enough not to require
the attribution? For example: "If the variable is empty but set (exists and
not NULL), ..."

Thank you for your help,
Ryan Cantalupo

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