: It's definitely a caching issue. There are a few ways to correct thisThe simplest way is to append a unique value as a query string to the name of the image so it always appear to be
It's definitely a caching issue. There are a few ways to correct thisThe simplest way is to append a unique value as a query string to the name of the image so it always appear to be new to the browser and it requests the image evrey time. Using a timestamp is the easiest way to do this.
<img src="/images/weatherupdate.png?19591782466" width='100" height="100" alt="Snow Delay">
You also serve that image through a PHP (or any server side language file) and send no cache headers along with that image.
<img src="/images/weatherupdate.php" width='100" height="100" alt="Snow Delay">
PHP Code:
<?php
$image = '/path/to/image/delayedopening.png';
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT");
header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
header("Cache-Control: private",false);
header("Content-Type: image/png");
header("Content-Disposition: attachment; filename=" . basename($image));
header("Content-Transfer-Encoding: binary");
header("Content-Length: " . filesize($image));
ob_clean();
flush();
readfile($image);
?>
You can also place the image in its own directory with other images you don't want cached and place this .htaccess file in there to prevent caching.
<FilesMatch ".(gif|png|jpg|jpeg)$">
FileETag None
<IfModule mod_headers.c>
Header unset ETag
Header set Cache-Control "max-age=0, no-cache, no-store, must-revalidate"
Header set Pragma "no-cache"
Header set Expires "Wed, 11 Jan 1984 05:00:00 GMT"
</IfModule>
</FilesMatch>
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