Re: [PHP4BETA] select() Design Notes

"Thies C. Arntzen" wrote: > > On Mon, 6 Dec 1999, Joey wrote: > > > Or, an idea, return an assoc. array, indexed by fd, with things like > > read/write, got an exception, etc. per fd? > > array indices are strings or integers. an fd is a resource - so that won't > work. > > but we could have: > > array("read" => array(/* of fds */),"write" => ... > > tc As I have it now, it works like Thies' original posting (select($timeout,$rfd[,$wfd][,$efd]) where $?fd can be an array of fd resources or a single fd resource). Since I see no easy way for select() to return whether each passed $?fd is set, fd_isset() can be used to check the status of a $?fd. How this works: select() extracts each fd in $?fd if it is an array. Each of these fd's is then FD_SET() into their appropriate fd_set (read, write, except). Because fd_isset() needs access to the fd_set and we don't want globals, select() registers the fd_sets with a key so that it is constant and can be fetched in fd_isset(). fd_isset($fd,"read"|"write"|"except") is passed the $fd that you want to check and a string identifying the set. The string is needed because the passed $fd could be in more than one set. Example Use: <? $rfd = fsockopen("www.php.net",80); $rfd2 = fsockopen("www.slashdot.org",80); $fd = array($rfd,$rfd2); select(10000000,$fd); if(fd_isset($rfd,"read")) { do_stuff(); } elseif(fd_isset($rfd2,"read")) { do_other_stuff(); } else { echo 'Connection was closed'; } ?> In its current form, if the connection was closed then fd_isset() will return true. Is there a way to see if the connection was closed? Comments? -- ev ---------------------------- Evan Klinger evan@php.net AIM evan715