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<?php
function delete_directory($dirname) {
if (is_dir($dirname)){
$dir_handle = opendir($dirname);
}
if (!$dir_handle){
return false;
}

while($file = readdir($dir_handle)) {
if ($file != "." && $file != "..") {
if (!is_dir($dirname."/".$file))
unlink($dirname."/".$file);
else
delete_directory($dirname.'/'.$file);
}
}

closedir($dir_handle);
rmdir($dirname);
return true;
}

delete_directory('foldername');?>