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Filename : directory_helper.php
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<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2019, British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package	CodeIgniter
 * @author	EllisLab Dev Team
 * @copyright	Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
 * @copyright	Copyright (c) 2014 - 2019, British Columbia Institute of Technology (https://bcit.ca/)
 * @license	https://opensource.org/licenses/MIT	MIT License
 * @link	https://codeigniter.com
 * @since	Version 1.0.0
 * @filesource
 */
defined('BASEPATH') OR exit('No direct script access allowed');

/**
 * CodeIgniter Directory Helpers
 *
 * @package		CodeIgniter
 * @subpackage	Helpers
 * @category	Helpers
 * @author		EllisLab Dev Team
 * @link		https://codeigniter.com/user_guide/helpers/directory_helper.html
 */

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

if ( ! function_exists('directory_map'))
{
	/**
	 * Create a Directory Map
	 *
	 * Reads the specified directory and builds an array
	 * representation of it. Sub-folders contained with the
	 * directory will be mapped as well.
	 *
	 * @param	string	$source_dir		Path to source
	 * @param	int	$directory_depth	Depth of directories to traverse
	 *						(0 = fully recursive, 1 = current dir, etc)
	 * @param	bool	$hidden			Whether to show hidden files
	 * @return	array
	 */
	function directory_map($source_dir, $directory_depth = 0, $hidden = FALSE)
	{
		if ($fp = @opendir($source_dir))
		{
			$filedata	= array();
			$new_depth	= $directory_depth - 1;
			$source_dir	= rtrim($source_dir, DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR;

			while (FALSE !== ($file = readdir($fp)))
			{
				// Remove '.', '..', and hidden files [optional]
				if ($file === '.' OR $file === '..' OR ($hidden === FALSE && $file[0] === '.'))
				{
					continue;
				}

				is_dir($source_dir.$file) && $file .= DIRECTORY_SEPARATOR;

				if (($directory_depth < 1 OR $new_depth > 0) && is_dir($source_dir.$file))
				{
					$filedata[$file] = directory_map($source_dir.$file, $new_depth, $hidden);
				}
				else
				{
					$filedata[] = $file;
				}
			}

			closedir($fp);
			return $filedata;
		}

		return FALSE;
	}
}