note 125342 added to function.sem-acquire

I recently had to use semaphores to avoid running an update of a database concurrently. For testing it I used two browser windows (chrome) on the same Desktop. In this case semaphores did not work as expected. Also flock on a file did not work as expected. Running the script from command line did work as expected. As soon as I used two different browsers, one on my desktop another within a virutal machine, it works like expected. Hope that helps anybody avoiding strange debugging sessions on this topic... ---- Server IP: 45.112.84.4 Probable Submitter: 103.51.167.36 (proxied: 80.149.156.222) ---- Manual Page -- http://php.net/manual/en/function.sem-acquire.php Edit -- https://master.php.net/note/edit/125342 Del: integrated -- https://master.php.net/note/delete/125342/integrated Del: useless -- https://master.php.net/note/delete/125342/useless Del: bad code -- https://master.php.net/note/delete/125342/bad+code Del: spam -- https://master.php.net/note/delete/125342/spam Del: non-english -- https://master.php.net/note/delete/125342/non-english Del: in docs -- https://master.php.net/note/delete/125342/in+docs Del: other reasons-- https://master.php.net/note/delete/125342 Reject -- https://master.php.net/note/reject/125342 Search -- https://master.php.net/manage/user-notes.php