Posted by C. on 07/16/07 14:59

On 15 Jul, 14:57, W Marsh <wayne.ma...@gmail.com> wrote:
> On 15 Jul, 14:41, Jerry Stuckle <jstuck...@attglobal.net> wrote:
>
>
>
> > W Marsh wrote:
> > > Hi. In my application I do something very simple - I open a file, lock
> > > it exclusively, write some data to it and close it.
>
> > > If I re-open it in the same process (I mean before the script has
> > > ended) to read the file, I find that the data I have written doesn't
> > > exist in there. I can't read it back until I run the script again.
>
> > > My question follows: WHAT
>
> > Sorry, my crystal ball is in the shop. I have no idea what might be
> > happening. Maybe if you post your code...
>
> > --
> > ==================
> > Remove the "x" from my email address
> > Jerry Stuckle
> > JDS Computer Training Corp.
> > jstuck...@attglobal.net
> > ==================
>
> No. For one thing it's private, commercial code, and secondly, I've
> given enough information about the problem.
>
> I don't appreciate people making sarcastic comments like that. If you
> have no idea about the problem then keep quiet, or if you genuinely
> are missing important details, make a polite request, e.g. "Are you
> doing X between closing and re-opening the file?". I'm not an outlet
> for problems with your insecurities and ego.
>
> If you really are that unimaginative, then here's some code (using my
> own original description as a design spec, proving my point somewhat):
>
> define(FILE_NAME, "somefile.txt");
>
> $dataOrig = array("here", "is", "some", "data", "to", "be",
> "serialized");
>
> $file = fopen(FILE_NAME, "w");
> flock($file, LOCK_EX);
> fwrite($file, serialize($dataOrig));
> fclose($file);
>
> $file = fopen(FILE_NAME, "r");
> $dataNew = unserialize(fread($file, filesize(FILE_NAME)));
>
> print_r($dataNew); // Expected output: Array ( [0] => here [1] => is
> [2] => some [3] => data [4] => to [5] => be [6] => serialized )
>
> It is not representative of the original code in terms of design or
> error checking, but it does reproduce the problem on the production
> server (no output, due to getting no data in the original file). It
> does however run correctly on a my own web server, which suggests the
> problem is one of configuration that somebody with experience in this
> field could shed some light on, which I would be grateful for.
>
> Do you see?


AIR filestats are cached therefore filesize() reports the same value
after you've changed a file. RTFM for clearstatcache.

C.

[Back to original message]