note 124969 added to function.flock

We found that using flock() in conjunction with fputcsv() to allow concurrent processes to write 1,000+ rows results in 5% of the rows being lost for some reason. It did not matter whether we opened the file in append mode (a), or opened it in read-write (r+) mode and then seeked AFTER the flock() call -- either way, rows were lost. For this reason, we ended up having to use a separate lock file. Failing code, failing results, and passing code can be found here: https://gist.github.com/GuyPaddock/371d42970e94d0e3f1087db6d91bfe02 ---- Server IP: 45.112.84.4 Probable Submitter: 38.142.137.34 (proxied: 52.250.119.245) ---- Manual Page -- http://php.net/manual/en/function.flock.php Edit -- https://master.php.net/note/edit/124969 Del: integrated -- https://master.php.net/note/delete/124969/integrated Del: useless -- https://master.php.net/note/delete/124969/useless Del: bad code -- https://master.php.net/note/delete/124969/bad+code Del: spam -- https://master.php.net/note/delete/124969/spam Del: non-english -- https://master.php.net/note/delete/124969/non-english Del: in docs -- https://master.php.net/note/delete/124969/in+docs Del: other reasons-- https://master.php.net/note/delete/124969 Reject -- https://master.php.net/note/reject/124969 Search -- https://master.php.net/manage/user-notes.php