On 23 Nov 2008, at 18:53, Stan wrote:
Let me attack this in a different way. This started because my
camera names
files whatever.JPG and my thumbnail generator generates thumbnail
files
whatever.jpg. Given my workstation (upon which I edit code and run
a web
browser) is W2K and my web server is APACHE2 on UBUNTU, I sometimes
have to
run out back and scream to maintain my sanity. I do not want
whoever (my
wife, my kids, maybe even my grandkids) to have to manually change
either
picture file extensions or generated thumbnail extensions on a mass of
pictures they're trying to add to our web site ... over the Internet
in some
cases.
I was attempting to avoid the overhead of generating thumbnails on
the fly
as I construct a page of thumbnails related to a specific event or
subject
because I don't know how many thumbnails may be rendered. The
subject on
which I encountered this problem (for the second time this week) has
something in the order of 250 pictures (in several different
directories).
What I'd really like to be able to do is to detect,
programmatically, FOR
SURE and FOR CERTAIN, that a specific file exists BEFORE I generate
the
anchor tag that contains the thumbnail ... given that every image
file has a
thumbnail file in a different directory than the image file. I need
to try
the file identifier from which the thumbnail file identifier was
derived
and, that failing, try changing the extension. If I can't find it I
don't
want to put up the thumbnail.
How can I do that, please? Do what? Detect, programmatically, FOR
SURE and
FOR CERTAIN, that a specific file exists.
I don't see the problem. For a start file_exists will do exactly what
you're asking for. It will tell you "programatically, FOR SURE and FOR
CERTAIN, that a specific file exists". That's what it does.
I don't understand why you don't generate the thumbnails to have
*exactly* the same filename as the actual image. And if you really
have to give it a different name, or different case, surely you know
the rules around how that works so you can build that logic in when
checking for the existence of a file.
Or maybe I'm missing something.
-Stut
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http://stut.net/
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