Re: anyone who REALY knows about file locking?

check out http://www.devhome.net/tutorials/111000.php --- Justin French <justin@indent.com.au> wrote: > hi, > > i'm after some sample code of correct file locking > procedures. I'm working on a high traffic site, and > > do not want to loose information due to overwriting > or anything like that, especially if two people try > and do the same thing at the same time. > > what happens when person A accesses the file, has it > > locked, and person B tries to open it? does the PHP > script wait until it's unlocked, or does it return > an error? is there a timeout? has any one realy > pushed this stuff, or do we just bang it together & > hope flock() does a good job? When A access info.file and is locked by it... and B tries to open it, it waits until the lock is released by A ... and yes there can be a timeout too! > > What am i after? > > - sample code for correct locking procedure which > covers all my queries above, and any i've missed > > - any information / testing results as to what > happens > when people try to access a locked file > > - any tutorials or anything that realy pushes the > file locking stuff, making sure i won't get errors > > or "file cannot be accessed" stuff when there is > simultaneous attempts to work with a file. > > > I know that in most cases --and in this case-- that > the chances of two people writing to a file at the > same instant is highly unlikely, and that the > writing > process could only take half a second or less > (probably > appending under 1K to a flat text file), but i think > > this is an area where perfection is probably worth a > > little effort :) > > > Thanks in advance, > Justin French > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, e-mail: > php-general-unsubscribe@lists.php.net > For additional commands, e-mail: > php-general-help@lists.php.net > To contact the list administrators, e-mail: > php-list-admin@lists.php.net > ===== To Find Out More About Me : http://mukul.tsx.org/ __________________________________________________ Do You Yahoo!? Get Yahoo! Mail - Free email you can access from anywhere! http://mail.yahoo.com/