tables_componente.php

				//Support for file field: file_1
				$input = JFactory::getApplication()->input;
				$files = $input->files->get('jform');
				if(!empty($files['file_1'])){
					jimport('joomla.filesystem.file');
					$file = $files['file_1'];

					//Check if the server found any error.
					$fileError = $file['error'];
					$message = '';
					if($fileError > 0 && $fileError != 4) {
						switch ($fileError) {
							case 1:
								$message = JText::_( 'File size exceeds allowed by the server');
								break;
							case 2:
								$message = JText::_( 'File size exceeds allowed by the html form');
								break;
							case 3:
								$message = JText::_( 'Partial upload error');
								break;
						}
						if($message != '') {
							JError::raiseWarning(500, $message);
							return false;
						}
					}
					else if($fileError == 4){
						if(isset($array['file_1_hidden'])){
							$array['file_1'] = $array['file_1_hidden'];
						}
					}
					else{

						//Replace any special characters in the filename
						$filename = explode('.', $file['name']);
						$filename[0] = preg_replace("/[^A-Za-z0-9]/i", "-", $filename[0]);

						//Add Timestamp MD5 to avoid overwriting
						$filename = md5(time()) . '-' . implode('.',$filename);
						$uploadPath = JPATH_ADMINISTRATOR . '/components/com_descargas/files/' . $filename;
						$fileTemp = $file['tmp_name'];
						if(!JFile::exists($uploadPath)){
							if (!JFile::upload($fileTemp, $uploadPath)){
								JError::raiseWarning(500, 'Error moving file');
								return false;
							}
						}
						$array['file_1'] = $filename;
					}
				}