Modification to ExpressionEngine's CodeIgniter based Upload library. Forces directories to be created if they don't exist. CodeIgniter/system/libraries/Upload.php

Upload.php

	// --------------------------------------------------------------------

	/**
	 * Validate Upload Path
	 *
	 * Verifies that it is a valid upload path with proper permissions.
	 *
	 *
	 * @return	bool
	 */
	public function validate_upload_path()
	{
		if ($this->upload_path == '')
		{
			$this->set_error('upload_no_filepath');
			return FALSE;
		}

		if (function_exists('realpath') AND @realpath($this->upload_path) !== FALSE)
		{
			$this->upload_path = str_replace("\\", "/", realpath($this->upload_path));
		}

		if ( ! @is_dir($this->upload_path))
		{
			if ( ! @mkdir($this->upload_path, 0777))
			{
				$this->set_error('upload_no_filepath');
				return FALSE;
			}
		}

		if ( ! is_really_writable($this->upload_path))
		{
			$this->set_error('upload_not_writable');
			return FALSE;
		}

		$this->upload_path = preg_replace("/(.+?)\/*$/", "\\1/",  $this->upload_path);
		return TRUE;
	}