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Re: Very strange behaviour of imageftbbox()? [message #173240 is a reply to message #173006] Tue, 29 March 2011 07:19 Go to previous message
gordonb.3puav is currently offline  gordonb.3puav
Messages: 1
Registered: March 2011
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> Now for a bit more information. The actual php code is used to generate
> these images is called by <img> statements in another php program's output.
>
> If a single instance of this code is running, I have not yet made it break.

> BUT if I call up several instances - i.e. the web browser calls for
> half a dozen instances of the program simultaneously via several
> slightly different <img> statements in the same page, that seems to be
> when the problem happens.

What creates these files in the first place? How are unique names
guaranteed? What guarantee is there that one of the files won't
be overwritten by one of the other files, *WHILE* your code is
running?

> Is it possible that some part of the GD library is not re-entrant?
>
> That's the only thing I can think of..or do you know better?
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