The time() function does indeed not have examples. The example you see on that page is from a user-contributed note which doesn't count.
I added an example to time() earlier this week.
See:
http://cvs.php.net/co.php/phpdoc/en/reference/datetime/functions/time.xml?r=1.5
The data at
http://www.phpdoc.info/meta/ has been inaccurate for at least as long (less than a week, though), as these scripts used to be located in a different place, and I forgot to update the config.
(I have them half moved to docweb, but.. time constraints...)
The generator is running now (and it updates daily when it's not broken).
S