RE: [PHP-DB] Automatically Refreshing png-Image'd Web Page
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: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Friday, March 19, 2004 11:01 AM To: [EMAIL PROTECTED] Subject: [PHP-DB] 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 -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP-DB] Automatically Refreshing png-Image'd Web Page
Thanks, Paul, you got it right. I was trying to do it all in one file/page. I'll have a go at your suggestion. dave 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 -Paul
Re: [PHP-DB] Automatically Refreshing png-Image'd Web Page
You might want to use iframe's so you can refresh just individual sections when you need to. On Fri, 2004-03-19 at 12:00, [EMAIL PROTECTED] wrote: 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 -- Adam Voigt [EMAIL PROTECTED] -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
