Example use of JFolder to load files from a folder filtering them by extension. We also want to allow extensions in uppercase.
Our test will be done in a folder with this sample content:

From that folder we only want to get the .jpg, .png, and .gif files. We will process it with this code:
// Sample folder
$imgsPath = JPATH_SITE . "/images/sampledata/fruitshop";
if (is_dir($imgsPath))
{
// Allowed filetypes
$allowedExtensions = array('jpg','png','gif');
// Also allow filetypes in uppercase
$allowedExtensions = array_merge($allowedExtensions, array_map('strtoupper', $allowedExtensions));
// Build the filter. Will return something like: "jpg|png|JPG|PNG|gif|GIF"
$filter = implode('|',$allowedExtensions);
$filter = "^.*\.(" . implode('|',$allowedExtensions) .")$";
$files = JFolder::files($imgsPath, $filter);
if ($files)
{
echo '';
print_r($files);
echo '
';
// Do something
}
else echo 'No files found';
}
Will return something like:
Array
(
[0] => filezilla.png
[1] => fireworks.png
[2] => fireworks2.PNG
[3] => fondomenu.JPG
[4] => heidisql.png
)