ci-bonfire / Sprint

system/helpers/file_helper.php

<?php

For compatibility and reusability of your code, PSR1 recommends that a file should introduce either new symbols (like classes, functions, etc.) or have side-effects (like outputting something, or including other files), but not both at the same time. The first symbol is defined on line 64 and the first side effect is on line 38.

/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014 - 2015, 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. (http://ellislab.com/)
 * @copyright	Copyright (c) 2014 - 2015, British Columbia Institute of Technology (http://bcit.ca/)
 * @license	http://opensource.org/licenses/MIT	MIT License
 * @link	http://codeigniter.com
 * @since	Version 1.0.0
 * @filesource
 */
defined('BASEPATH') OR exit('No direct script access allowed');

/**
 * CodeIgniter File Helpers
 *
 * @package		CodeIgniter
 * @subpackage	Helpers
 * @category	Helpers
 * @author		EllisLab Dev Team
 * @link		http://codeigniter.com/user_guide/helpers/file_helper.html
 */

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

if ( ! function_exists('read_file'))
{
	/**
	 * Read File
	 *
	 * Opens the file specified in the path and returns it as a string.
	 *
	 * @todo	Remove in version 3.1+.
	 * @deprecated	3.0.0	It is now just an alias for PHP's native file_get_contents().
	 * @param	string	$file	Path to file
	 * @return	string	File contents
	 */
	function read_file($file)
	{
		return @file_get_contents($file);
	}
}

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

if ( ! function_exists('write_file'))
{
	/**
	 * Write File
	 *
	 * Writes data to the file specified in the path.
	 * Creates a new file if non-existent.
	 *
	 * @param	string	$path	File path
	 * @param	string	$data	Data to write
	 * @param	string	$mode	fopen() mode (default: 'wb')
	 * @return	bool
	 */
	function write_file($path, $data, $mode = 'wb')
	{
		if ( ! $fp = @fopen($path, $mode))
		{
			return FALSE;
		}

		flock($fp, LOCK_EX);

		for ($result = $written = 0, $length = strlen($data); $written < $length; $written += $result)
		{
			if (($result = fwrite($fp, substr($data, $written))) === FALSE)
			{
				break;
			}
		}

		flock($fp, LOCK_UN);
		fclose($fp);

		return is_int($result);
	}
}

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

if ( ! function_exists('delete_files'))
{
	/**
	 * Delete Files
	 *
	 * Deletes all files contained in the supplied directory path.
	 * Files must be writable or owned by the system in order to be deleted.
	 * If the second parameter is set to TRUE, any directories contained
	 * within the supplied base directory will be nuked as well.
	 *
	 * @param	string	$path		File path
	 * @param	bool	$del_dir	Whether to delete any directories found in the path
	 * @param	bool	$htdocs		Whether to skip deleting .htaccess and index page files
	 * @param	int	$_level		Current directory depth level (default: 0; internal use only)
	 * @return	bool
	 */
	function delete_files($path, $del_dir = FALSE, $htdocs = FALSE, $_level = 0)
	{
		// Trim the trailing slash
		$path = rtrim($path, '/\\');

		if ( ! $current_dir = @opendir($path))
		{
			return FALSE;
		}

		while (FALSE !== ($filename = @readdir($current_dir)))
		{
			if ($filename !== '.' && $filename !== '..')
			{
				if (is_dir($path.DIRECTORY_SEPARATOR.$filename) && $filename[0] !== '.')
				{
					delete_files($path.DIRECTORY_SEPARATOR.$filename, $del_dir, $htdocs, $_level + 1);
				}
				elseif ($htdocs !== TRUE OR ! preg_match('/^(\.htaccess|index\.(html|htm|php)|web\.config)$/i', $filename))
				{
					@unlink($path.DIRECTORY_SEPARATOR.$filename);
				}
			}
		}

		closedir($current_dir);

		return ($del_dir === TRUE && $_level > 0)
			? @rmdir($path)
			: TRUE;
	}
}

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

if ( ! function_exists('get_filenames'))
{
	/**
	 * Get Filenames
	 *
	 * Reads the specified directory and builds an array containing the filenames.
	 * Any sub-folders contained within the specified path are read as well.
	 *
	 * @param	string	path to source
	 * @param	bool	whether to include the path as part of the filename
	 * @param	bool	internal variable to determine recursion status - do not use in calls
	 * @return	array
	 */
	function get_filenames($source_dir, $include_path = FALSE, $_recursion = FALSE)
	{
		static $_filedata = array();

		if ($fp = @opendir($source_dir))
		{
			// reset the array and make sure $source_dir has a trailing slash on the initial call
			if ($_recursion === FALSE)
			{
				$_filedata = array();
				$source_dir = rtrim(realpath($source_dir), DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR;
			}

			while (FALSE !== ($file = readdir($fp)))
			{
				if (is_dir($source_dir.$file) && $file[0] !== '.')
				{
					get_filenames($source_dir.$file.DIRECTORY_SEPARATOR, $include_path, TRUE);
				}
				elseif ($file[0] !== '.')
				{
					$_filedata[] = ($include_path === TRUE) ? $source_dir.$file : $file;
				}
			}

			closedir($fp);
			return $_filedata;
		}

		return FALSE;
	}
}

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

if ( ! function_exists('get_dir_file_info'))
{
	/**
	 * Get Directory File Information
	 *
	 * Reads the specified directory and builds an array containing the filenames,
	 * filesize, dates, and permissions
	 *
	 * Any sub-folders contained within the specified path are read as well.
	 *
	 * @param	string	path to source
	 * @param	bool	Look only at the top level directory specified?
	 * @param	bool	internal variable to determine recursion status - do not use in calls
	 * @return	array
	 */
	function get_dir_file_info($source_dir, $top_level_only = TRUE, $_recursion = FALSE)
	{
		static $_filedata = array();
		$relative_path = $source_dir;

		if ($fp = @opendir($source_dir))
		{
			// reset the array and make sure $source_dir has a trailing slash on the initial call
			if ($_recursion === FALSE)
			{
				$_filedata = array();
				$source_dir = rtrim(realpath($source_dir), DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR;
			}

			// Used to be foreach (scandir($source_dir, 1) as $file), but scandir() is simply not as fast

36% of this comment could be valid code. Did you maybe forget this after debugging?

			while (FALSE !== ($file = readdir($fp)))
			{
				if (is_dir($source_dir.$file) && $file[0] !== '.' && $top_level_only === FALSE)
				{
					get_dir_file_info($source_dir.$file.DIRECTORY_SEPARATOR, $top_level_only, TRUE);
				}
				elseif ($file[0] !== '.')
				{
					$_filedata[$file] = get_file_info($source_dir.$file);
					$_filedata[$file]['relative_path'] = $relative_path;
				}
			}

			closedir($fp);
			return $_filedata;
		}

		return FALSE;
	}
}

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

if ( ! function_exists('get_file_info'))
{
	/**
	 * Get File Info
	 *
	 * Given a file and path, returns the name, path, size, date modified
	 * Second parameter allows you to explicitly declare what information you want returned
	 * Options are: name, server_path, size, date, readable, writable, executable, fileperms
	 * Returns FALSE if the file cannot be found.
	 *
	 * @param	string	path to file
	 * @param	mixed	array or comma separated string of information returned
	 * @return	array
	 */
	function get_file_info($file, $returned_values = array('name', 'server_path', 'size', 'date'))
	{
		if ( ! file_exists($file))
		{
			return FALSE;
		}

		if (is_string($returned_values))
		{
			$returned_values = explode(',', $returned_values);
		}

		foreach ($returned_values as $key)
		{
			switch ($key)
			{
				case 'name':
					$fileinfo['name'] = basename($file);
					break;
				case 'server_path':
					$fileinfo['server_path'] = $file;
					break;
				case 'size':
					$fileinfo['size'] = filesize($file);
					break;
				case 'date':
					$fileinfo['date'] = filemtime($file);
					break;
				case 'readable':
					$fileinfo['readable'] = is_readable($file);
					break;
				case 'writable':
					$fileinfo['writable'] = is_really_writable($file);
					break;
				case 'executable':
					$fileinfo['executable'] = is_executable($file);
					break;
				case 'fileperms':
					$fileinfo['fileperms'] = fileperms($file);
					break;
			}
		}

		return $fileinfo;
	}
}

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

if ( ! function_exists('get_mime_by_extension'))
{
	/**
	 * Get Mime by Extension
	 *
	 * Translates a file extension into a mime type based on config/mimes.php.
	 * Returns FALSE if it can't determine the type, or open the mime config file
	 *
	 * Note: this is NOT an accurate way of determining file mime types, and is here strictly as a convenience
	 * It should NOT be trusted, and should certainly NOT be used for security
	 *
	 * @param	string	$filename	File name
	 * @return	string
	 */
	function get_mime_by_extension($filename)
	{
		static $mimes;

		if ( ! is_array($mimes))
		{
			$mimes = get_mimes();

			if (empty($mimes))
			{
				return FALSE;
			}
		}

		$extension = strtolower(substr(strrchr($filename, '.'), 1));

		if (isset($mimes[$extension]))
		{
			return is_array($mimes[$extension])
				? current($mimes[$extension]) // Multiple mime types, just give the first one
				: $mimes[$extension];
		}

		return FALSE;
	}
}

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

if ( ! function_exists('symbolic_permissions'))
{
	/**
	 * Symbolic Permissions
	 *
	 * Takes a numeric value representing a file's permissions and returns
	 * standard symbolic notation representing that value
	 *
	 * @param	int	$perms	Permissions
	 * @return	string
	 */
	function symbolic_permissions($perms)
	{
		if (($perms & 0xC000) === 0xC000)
		{
			$symbolic = 's'; // Socket
		}
		elseif (($perms & 0xA000) === 0xA000)
		{
			$symbolic = 'l'; // Symbolic Link
		}
		elseif (($perms & 0x8000) === 0x8000)
		{
			$symbolic = '-'; // Regular
		}
		elseif (($perms & 0x6000) === 0x6000)
		{
			$symbolic = 'b'; // Block special
		}
		elseif (($perms & 0x4000) === 0x4000)
		{
			$symbolic = 'd'; // Directory
		}
		elseif (($perms & 0x2000) === 0x2000)
		{
			$symbolic = 'c'; // Character special
		}
		elseif (($perms & 0x1000) === 0x1000)
		{
			$symbolic = 'p'; // FIFO pipe
		}
		else
		{
			$symbolic = 'u'; // Unknown
		}

		// Owner
		$symbolic .= (($perms & 0x0100) ? 'r' : '-')
			.(($perms & 0x0080) ? 'w' : '-')
			.(($perms & 0x0040) ? (($perms & 0x0800) ? 's' : 'x' ) : (($perms & 0x0800) ? 'S' : '-'));

		// Group
		$symbolic .= (($perms & 0x0020) ? 'r' : '-')
			.(($perms & 0x0010) ? 'w' : '-')
			.(($perms & 0x0008) ? (($perms & 0x0400) ? 's' : 'x' ) : (($perms & 0x0400) ? 'S' : '-'));

		// World
		$symbolic .= (($perms & 0x0004) ? 'r' : '-')
			.(($perms & 0x0002) ? 'w' : '-')
			.(($perms & 0x0001) ? (($perms & 0x0200) ? 't' : 'x' ) : (($perms & 0x0200) ? 'T' : '-'));

		return $symbolic;
	}
}

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

if ( ! function_exists('octal_permissions'))
{
	/**
	 * Octal Permissions
	 *
	 * Takes a numeric value representing a file's permissions and returns
	 * a three character string representing the file's octal permissions
	 *
	 * @param	int	$perms	Permissions
	 * @return	string
	 */
	function octal_permissions($perms)
	{
		return substr(sprintf('%o', $perms), -3);
	}
}