I might be reading this wrong, but I do not think you should put your
meta refresh request in the png creation script. It should be in the
html body script.
Index.php
========================
Meta-refresh to call itself in 30 secs
Call to <img src="php_radio_image_creation_script.php">
php_radio_image_creation_script.php
========================
header("Content-type: image/png")
Echo image content
Hopefully this sudo code is enough to get what I am trying to say. You
might have some caching issues, but that is another issue.
- Paul
-----Original Message-----
From: dpgirago@xxxxxxxxxxxxxx [mailto:dpgirago@xxxxxxxxxxxxxx]
Sent: Friday, March 19, 2004 11:01 AM
To: php-db@xxxxxxxxxxxxx
Subject: Automatically Refreshing png-Image'd Web Page
Howdy Listers,
The Background:
I am making dynamic, color-coded, png images of the floor plan of a
building and displaying them in a browser. Numerous radioactivity
sensors
throughout the building send their readings to a MySQL dB, and the web
page queries the dB, and depending on the readings, the areas specific
to
the sensors will appear green for normal, yellow for high but
acceptable,
and red for critical. All this works OK.
The Problem:
Neither the HTML nor JavaScript code I usually use for automatically
refreshing a page has any effect if the header("Content-type:
image/png")
necessary for displaying the png image is included. If I comment out the
header() line, the page refreshes, but the image data comes through as
hieroglyphics. Obviously, I need to refresh the page to get the latest
data, and to create and display the corresponding image.
The Question:
Is there any way to automatically refresh a web page displaying a png
image?
Thanks in advance for any thoughts/insights into how I can solve this
problem.
dave
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