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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 File Helpers
*
* @package CodeIgniter
* @subpackage Helpers
* @category Helpers
* @author EllisLab Dev Team
* @link https://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 !== '..')
{
$filepath = $path.DIRECTORY_SEPARATOR.$filename;
if (is_dir($filepath) && $filename[0] !== '.' && ! is_link($filepath))
{
delete_files($filepath, $del_dir, $htdocs, $_level + 1);
}
elseif ($htdocs !== TRUE OR ! preg_match('/^(\.htaccess|index\.(html|htm|php)|web\.config)$/i', $filename))
{
@unlink($filepath);
}
}
}
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 $file), but scandir() is simply not as fast
while (FALSE !== ($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);
}
}