Re: [PHP] Graphics question
At 05:38 08.11.2002, Mike Mannakee said:
[snip]
Jeez, this is simple. The browser is caching the image. There's no real
way to fix that. There are some headers that may encourage the browser to
not cache, but there is no sure way to control whether the users will have
this setting overridden.
Or, as in a previous thread from yesterday, you could make the image url
look different by using random():
img src=http://your/imageurl.jpg??php echo random()?
You can also search for specifics of the headers that are meant to stop a
browser from caching.
No-cache MIME headers are:
header('Pragma: no-cache');
header('Cache: none');
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[PHP] Graphics question
I have created a webpage that builds a table and graph using the GD functions. When I switch to another page or select a different month to build the table for, the graph.jpg does not rebuild. I have to press reload to make the graph render using the new data. I have used imagedistroy($pic) in the hopes that this will work, but it didn't. To elaborate on the situation, I first call imagecreate, then run the code to create the bar graph. I then use imagejpg($pic,$graphname) (or something ot that affect. I don't have access to the code at home). I then show the picture using echo img src=\$graph\; Finally I call imagedestroy($pic). Do you have any suggestions? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Graphics question
sounds like a browser caching problem to me dunno if that helps though :/ -Original Message- From: Robbert van Andel [mailto:robbert;vafam.com] Sent: Friday, November 08, 2002 2:30 PM To: [EMAIL PROTECTED] Subject: [PHP] Graphics question I have created a webpage that builds a table and graph using the GD functions. When I switch to another page or select a different month to build the table for, the graph.jpg does not rebuild. I have to press reload to make the graph render using the new data. I have used imagedistroy($pic) in the hopes that this will work, but it didn't. To elaborate on the situation, I first call imagecreate, then run the code to create the bar graph. I then use imagejpg($pic,$graphname) (or something ot that affect. I don't have access to the code at home). I then show the picture using echo img src=\$graph\; Finally I call imagedestroy($pic). Do you have any suggestions? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Graphics question
Is there a way I can keep the caching from happening using PHP? On Thu, 2002-11-07 at 19:32, Martin Towell wrote: sounds like a browser caching problem to me dunno if that helps though :/ -Original Message- From: Robbert van Andel [mailto:robbert;vafam.com] Sent: Friday, November 08, 2002 2:30 PM To: [EMAIL PROTECTED] Subject: [PHP] Graphics question I have created a webpage that builds a table and graph using the GD functions. When I switch to another page or select a different month to build the table for, the graph.jpg does not rebuild. I have to press reload to make the graph render using the new data. I have used imagedistroy($pic) in the hopes that this will work, but it didn't. To elaborate on the situation, I first call imagecreate, then run the code to create the bar graph. I then use imagejpg($pic,$graphname) (or something ot that affect. I don't have access to the code at home). I then show the picture using echo img src=\$graph\; Finally I call imagedestroy($pic). Do you have any suggestions? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Graphics question
It's explained in the header() page of the manual: ?php header(Expires: Mon, 26 Jul 1997 05:00:00 GMT);// Date in the past header(Last-Modified: . gmdate(D, d M Y H:i:s) . GMT); // always modified header(Cache-Control: no-store, no-cache, must-revalidate); // HTTP/1.1 header(Cache-Control: post-check=0, pre-check=0, false); header(Pragma: no-cache); // HTTP/1.0 ? Marco - php|architect -- The Monthly Magazine For PHP Professionals Come visit us on the web at http://www.phparch.com! On Thu, 2002-11-07 at 22:35, Robbert van Andel wrote: Is there a way I can keep the caching from happening using PHP? On Thu, 2002-11-07 at 19:32, Martin Towell wrote: sounds like a browser caching problem to me dunno if that helps though :/ -Original Message- From: Robbert van Andel [mailto:robbert;vafam.com] Sent: Friday, November 08, 2002 2:30 PM To: [EMAIL PROTECTED] Subject: [PHP] Graphics question I have created a webpage that builds a table and graph using the GD functions. When I switch to another page or select a different month to build the table for, the graph.jpg does not rebuild. I have to press reload to make the graph render using the new data. I have used imagedistroy($pic) in the hopes that this will work, but it didn't. To elaborate on the situation, I first call imagecreate, then run the code to create the bar graph. I then use imagejpg($pic,$graphname) (or something ot that affect. I don't have access to the code at home). I then show the picture using echo img src=\$graph\; Finally I call imagedestroy($pic). Do you have any suggestions? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Graphics question
The reason imagedestroy() may have not worked for you is that maybe imagedestroy() is misspelled? If you misspelled it in the code then it won't work. Just a suggestion. - Darwin -Original Message- From: Robbert van Andel [mailto:robbert;vafam.com] Sent: Thursday, November 07, 2002 9:30 PM To: [EMAIL PROTECTED] Subject: [PHP] Graphics question I have created a webpage that builds a table and graph using the GD functions. When I switch to another page or select a different month to build the table for, the graph.jpg does not rebuild. I have to press reload to make the graph render using the new data. I have used imagedistroy($pic) in the hopes that this will work, but it didn't. To elaborate on the situation, I first call imagecreate, then run the code to create the bar graph. I then use imagejpg($pic,$graphname) (or something ot that affect. I don't have access to the code at home). I then show the picture using echo img src=\$graph\; Finally I call imagedestroy($pic). Do you have any suggestions? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Graphics question
That would cause an error like call to undefined function. But thanks for the suggestion. On Thu, 2002-11-07 at 20:04, @ Darwin wrote: The reason imagedestroy() may have not worked for you is that maybe imagedestroy() is misspelled? If you misspelled it in the code then it won't work. Just a suggestion. - Darwin -Original Message- From: Robbert van Andel [mailto:robbert;vafam.com] Sent: Thursday, November 07, 2002 9:30 PM To: [EMAIL PROTECTED] Subject: [PHP] Graphics question I have created a webpage that builds a table and graph using the GD functions. When I switch to another page or select a different month to build the table for, the graph.jpg does not rebuild. I have to press reload to make the graph render using the new data. I have used imagedistroy($pic) in the hopes that this will work, but it didn't. To elaborate on the situation, I first call imagecreate, then run the code to create the bar graph. I then use imagejpg($pic,$graphname) (or something ot that affect. I don't have access to the code at home). I then show the picture using echo img src=\$graph\; Finally I call imagedestroy($pic). Do you have any suggestions? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Graphics question
If it's just the browser caching are you able to use something like graph.jpg?cachebust=something random here like a datetime or something. I'm not familiar with the way your doing it.. but I guess it has to be given a name to the browser somewhere doesn't it? I use this on pages and images as well as headers for things that must not be cached. Cheers Brendon -Original Message- From: Mike Mannakee [mailto:mike;basementideas.com] Sent: Friday, November 08, 2002 2:39 PM To: [EMAIL PROTECTED] Subject: Re: [PHP] Graphics question Jeez, this is simple. The browser is caching the image. There's no real way to fix that. There are some headers that may encourage the browser to not cache, but there is no sure way to control whether the users will have this setting overridden. imagedestroy($pic); is only freeing the memory used on the server while the script is executing. It's nice if you're doing a whole bunch of processing after generating the image but otherwise the memory is automatically freed when the script exits. It will do nothing to affect the copy that now sits in the browser's cache. In other words, you'll just have to hit reload. You can also search for specifics of the headers that are meant to stop a browser from caching. Mike @ Darwin [EMAIL PROTECTED] wrote in message news:ELEJIJLJOIJKFAHADGOMGEBHCBAA.superbus22;attbi.com... The reason imagedestroy() may have not worked for you is that maybe imagedestroy() is misspelled? If you misspelled it in the code then it won't work. Just a suggestion. - Darwin -Original Message- From: Robbert van Andel [mailto:robbert;vafam.com] Sent: Thursday, November 07, 2002 9:30 PM To: [EMAIL PROTECTED] Subject: [PHP] Graphics question I have created a webpage that builds a table and graph using the GD functions. When I switch to another page or select a different month to build the table for, the graph.jpg does not rebuild. I have to press reload to make the graph render using the new data. I have used imagedistroy($pic) in the hopes that this will work, but it didn't. To elaborate on the situation, I first call imagecreate, then run the code to create the bar graph. I then use imagejpg($pic,$graphname) (or something ot that affect. I don't have access to the code at home). I then show the picture using echo img src=\$graph\; Finally I call imagedestroy($pic). Do you have any suggestions? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] Graphics question
Jeez, this is simple. The browser is caching the image. There's no real way to fix that. There are some headers that may encourage the browser to not cache, but there is no sure way to control whether the users will have this setting overridden. I use srand((double)microtime()*100); $anticache= md5(rand(0,999)); and then echo IMG src=\drawpic.php?arg1=blaharg2=blah.anticache=$anticache\ \n; Since this addition, i have never had a problem with cache, HTH Todd. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
