Dan Trainor wrote:
I've seen a few times, albeit I don't know how, people generate images
on a page in different ways, such as maybe using base64 to output the
raw image data into a page? Is this correct?
If so, what does it "look" like? How would one go about doing this?
If not, what are my options to achieve something like this? What are my
alternatives? What kind of performance impact, if any, does this make
on both the load on the server and the rendering time for a given image
to the client? Last but certainly not least, is this a dumb idea?
What I'm looking to do is to deliver dynamic content to the browser,
without writing images to disk. I simply want what would be written to
disk, be displayed in a specific area I'm talking about.
I'm sorry if this is a dumb question. Once I get a few more clues here,
I'll be able to figure the rest of this out pretty well, I'm quite sure.
To output it directly on the page (with base64 or otherwise), you need
to make use of the data: URI scheme [1]. This is, unfortunately, not
supported by (you guessed it) MSIE, although I believe Gecko-based
browsers have support. Not sure about Opera.
However, the usual way to go about this is to do something like:
<img src="/some_script.php?some_var=some_value" alt="some alt text">
in the HTML, and then in some_script.php put the following code:
header('Content-Type: image/jpeg'); //or whatever image type
and use GD functions [2] to create and output the image.
HTH
Jasper
[1] http://www.faqs.org/rfcs/rfc2396.html
[2] http://www.php.net/gd
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