Dan Trainor wrote:
Dan Trainor wrote:
Hello, all -
This is a question that could depend on a completely different (yet,
relayed) subject, so I'm sending this email to both php-general@ and
httpd@xxxxxxxxxxxxxxxxx I thank you in advance for your understanding.
I am currently generating some images on the fly using some of PHP's
image generation and rendering functions. I'm having loads of
success, and like the results that I see.
What I'd like this script to do is, to create symlinks to the
origional image, and then when the script is done running, the
symlinks are deleted. Basically trying to make it so that the
origional image is not known to the client or browser.
So I'm taking, say, image1.jpg. I'm creating a symlink via:
$linkname = md5(rand());
or something similar. I'd then like to return $linkname to the client
or browser. Then, when the browser has completed rendering the page
to the client or browser, the symlink is then deleted.
What I'm curious as to right now is if I do this, the client will see
the link to $linkname via HTML's "img src=" specification. What
happens if this is sent to the client or browser, and the symlink is
deleted immediately after the name is sent to the client or browser?
Would the web server (in this case, Apache) cache the image in memory
until the client has downloaded said image, and then delete it from
memory when the page is done rendering or being sent? Will PHP
totally disregard the web server's request to "hold" the image, and
render nothing to the browser? This is something I'm confused about.
Thanks!
-dant
Hello -
Don't suppose anyone has any pointers for me with this one, do ya?
Thanks!
-dant
I tried something similar to this a while back, although not with
symlinks. I was writing a copy of the image to a "temporary" directory,
sending that out to the browser in an <img> tag, then removing the copy.
It worked like a charm in IE, but Netscaape/Mozilla/Firebird/Safari
would give me a "corrupted image" or some-such error.
The only thing I could figure out from it was the browsers that do a
"look ahead" on the links to the image wouldn't see an image at the link
before it was clicked, and would cache that result. Eventually I just
gave up on that idea.
You might look for the recent threads that deal with dynamic image
generation that sends the image directly to the browser. There's been a
few reciently and you might be able to do something with that.
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