note 123582 added to function.stream-select

When stream_select() fails you SHOULD NOT use the results of the arrays (i.e. read, write, except) that were passed into it as parameters. While doing so anyway won't trigger undefined behaviour, you are depending on unspecified behaviour that by definition is not guaranteed. At the time of writing the PHP 7.2 interpreter does not modify the arrays upon stream_select() failure (see the code around https://github.com/php/php-src/blob/php-7.2.14/ext/standard/streamsfuncs.c#L842) thus a PHP program that doesn't heed the advice above can deceive itself as to the state of those streams. (Hopefully this warning can be added to the main documentation one day) ---- Server IP: 208.43.231.9 Probable Submitter: 185.85.3.194 (proxied: 146.90.204.203) ---- Manual Page -- http://php.net/manual/en/function.stream-select.php Edit -- https://master.php.net/note/edit/123582 Del: integrated -- https://master.php.net/note/delete/123582/integrated Del: useless -- https://master.php.net/note/delete/123582/useless Del: bad code -- https://master.php.net/note/delete/123582/bad+code Del: spam -- https://master.php.net/note/delete/123582/spam Del: non-english -- https://master.php.net/note/delete/123582/non-english Del: in docs -- https://master.php.net/note/delete/123582/in+docs Del: other reasons-- https://master.php.net/note/delete/123582 Reject -- https://master.php.net/note/reject/123582 Search -- https://master.php.net/manage/user-notes.php