Re: Traversing an appendable file

I was thinking it was obvious because otherwise I'd have just been using that and not even posted about the "a/a+". Using "a" works in the way that it is supposed to (it starts at the end), but what I wanted was to use append and then just append to anywhere in the file. Currently to get that done I use "file(filelocation);" and then just search that array for what I want. Once I find it I save the key and then concatenate what I want to that line. Then after I've done that I implode the array and "w" (write) that. This of course works perfectly, but once the file starts to get larger, I'm worried that it is going to become slow, so I was looking for a way to append (which now that I think about it, would do the same thing, only with less work on my part). "Richard Lynch" <rich@phpbootcamp.com> wrote in message news:php.general-108966@news.php.net... > >Is there any way to fseek (or something to the exact same effect) a file > >opened with "a" or "a+"? > > > >I've tried rewinding and fseeking appendable files, but neither work. > > > >Opening up in "r+" gives me part of the desired result, but if where I want > >to write is not at the end, it writes over things, which I obviously do not > >want. > > It may be obvious to you that you don't want that, but it's not to anybody > else :-) > > Use r+ and fseek to the end of the file. You can use PHP's filesize > (filelength?) function to find out where that is. > > I think a+ is only if you are "promising" not to go backwards into the old > data... Maybe it's for some kind of OS optimization or something...