I wanted a Joomla extension which would (among other things) allow me to show a different image for every day of the month but couldn't find one.
So I decided to learn PHP to do the job. I wrote some code which works perfectly under WAMP as PHP using:
$handle = opendir(dirname(realpath(__FILE__)).$imagedir) or die ("cannot open directory");
However when I use this in Metamod etc I get an opendir function error.
Please explain how I should reformat this for Joomla 3.
JFolder is used to get the contents of a directory within Joomla, presuming that is what you are trying to do with that line of code.
Methods here: https://docs.joomla.org/API17:JFolder
A bit more code (what is behind $imagedir, what is the way of ouput) would help.
Just a shot in the blue:
$img = JPATH_SITE.'/images/someFolder/'.date('d',time()).'.jpg'; // absolute path
$img = __DIR__.'/someFolder'.date('d',time()).'.jpg'; // abs. path relative to current file
$imgContent = filet_get_contents($img);
As relative src url:
$img = JURI::base().'images/someFolder/'.date('d',time()).'.jpg';
// http://domain.com/images/someFolder/27.jpg
