what's the official position on apache threaded environments

So what's the story with PHP and multithreaded environments these days? Does this statement on the PHP website still stand? http://www.php.net/manual/en/faq.installation.php#faq.installation.apache2 Seems a bit archaic these days to eschew multithreaded environments, doesn't it? More specific questions: * is there any kind of authoritative list of PHP modules that are NOT threadsafe? If so, where might I find it? * What warnings, indications, failures, or errors, if any, might I encounter if I am experiencing undesirable behavior by using PHP in an event or worker environment? * Does anyone have any comment on the recommended means of acquiring PHP within Apache as described on the apache wki here: https://wiki.apache.org/httpd/php