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479 lines
11 KiB
479 lines
11 KiB
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); |
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/** |
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* CodeIgniter |
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* |
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* An open source application development framework for PHP 5.1.6 or newer |
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* |
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* @package CodeIgniter |
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* @author ExpressionEngine Dev Team |
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* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc. |
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* @license http://codeigniter.com/user_guide/license.html |
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* @link http://codeigniter.com |
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* @since Version 1.0 |
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* @filesource |
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*/ |
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// ------------------------------------------------------------------------ |
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/** |
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* CodeIgniter File Helpers |
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* |
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* @package CodeIgniter |
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* @subpackage Helpers |
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* @category Helpers |
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* @author ExpressionEngine Dev Team |
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* @link http://codeigniter.com/user_guide/helpers/file_helpers.html |
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*/ |
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// ------------------------------------------------------------------------ |
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/** |
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* Read File |
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* |
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* Opens the file specfied in the path and returns it as a string. |
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* |
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* @access public |
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* @param string path to file |
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* @return string |
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*/ |
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if ( ! function_exists('read_file')) |
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{ |
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function read_file($file) |
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{ |
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if ( ! file_exists($file)) |
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{ |
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return FALSE; |
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} |
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if (function_exists('file_get_contents')) |
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{ |
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return file_get_contents($file); |
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} |
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if ( ! $fp = @fopen($file, FOPEN_READ)) |
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{ |
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return FALSE; |
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} |
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flock($fp, LOCK_SH); |
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$data = ''; |
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if (filesize($file) > 0) |
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{ |
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$data =& fread($fp, filesize($file)); |
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} |
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flock($fp, LOCK_UN); |
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fclose($fp); |
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return $data; |
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} |
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} |
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// ------------------------------------------------------------------------ |
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/** |
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* Write File |
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* |
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* Writes data to the file specified in the path. |
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* Creates a new file if non-existent. |
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* |
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* @access public |
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* @param string path to file |
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* @param string file data |
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* @return bool |
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*/ |
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if ( ! function_exists('write_file')) |
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{ |
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function write_file($path, $data, $mode = FOPEN_WRITE_CREATE_DESTRUCTIVE) |
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{ |
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if ( ! $fp = @fopen($path, $mode)) |
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{ |
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return FALSE; |
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} |
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flock($fp, LOCK_EX); |
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fwrite($fp, $data); |
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flock($fp, LOCK_UN); |
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fclose($fp); |
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return TRUE; |
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} |
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} |
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// ------------------------------------------------------------------------ |
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/** |
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* Delete Files |
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* |
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* Deletes all files contained in the supplied directory path. |
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* Files must be writable or owned by the system in order to be deleted. |
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* If the second parameter is set to TRUE, any directories contained |
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* within the supplied base directory will be nuked as well. |
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* |
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* @access public |
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* @param string path to file |
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* @param bool whether to delete any directories found in the path |
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* @return bool |
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*/ |
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if ( ! function_exists('delete_files')) |
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{ |
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function delete_files($path, $del_dir = FALSE, $level = 0) |
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{ |
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// Trim the trailing slash |
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$path = rtrim($path, DIRECTORY_SEPARATOR); |
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if ( ! $current_dir = @opendir($path)) |
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{ |
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return FALSE; |
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} |
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while (FALSE !== ($filename = @readdir($current_dir))) |
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{ |
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if ($filename != "." and $filename != "..") |
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{ |
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if (is_dir($path.DIRECTORY_SEPARATOR.$filename)) |
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{ |
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// Ignore empty folders |
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if (substr($filename, 0, 1) != '.') |
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{ |
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delete_files($path.DIRECTORY_SEPARATOR.$filename, $del_dir, $level + 1); |
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} |
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} |
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else |
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{ |
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unlink($path.DIRECTORY_SEPARATOR.$filename); |
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} |
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} |
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} |
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@closedir($current_dir); |
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if ($del_dir == TRUE AND $level > 0) |
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{ |
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return @rmdir($path); |
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} |
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return TRUE; |
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} |
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} |
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// ------------------------------------------------------------------------ |
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/** |
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* Get Filenames |
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* |
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* Reads the specified directory and builds an array containing the filenames. |
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* Any sub-folders contained within the specified path are read as well. |
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* |
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* @access public |
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* @param string path to source |
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* @param bool whether to include the path as part of the filename |
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* @param bool internal variable to determine recursion status - do not use in calls |
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* @return array |
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*/ |
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if ( ! function_exists('get_filenames')) |
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{ |
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function get_filenames($source_dir, $include_path = FALSE, $_recursion = FALSE) |
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{ |
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static $_filedata = array(); |
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if ($fp = @opendir($source_dir)) |
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{ |
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// reset the array and make sure $source_dir has a trailing slash on the initial call |
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if ($_recursion === FALSE) |
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{ |
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$_filedata = array(); |
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$source_dir = rtrim(realpath($source_dir), DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR; |
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} |
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while (FALSE !== ($file = readdir($fp))) |
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{ |
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if (@is_dir($source_dir.$file) && strncmp($file, '.', 1) !== 0) |
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{ |
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get_filenames($source_dir.$file.DIRECTORY_SEPARATOR, $include_path, TRUE); |
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} |
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elseif (strncmp($file, '.', 1) !== 0) |
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{ |
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$_filedata[] = ($include_path == TRUE) ? $source_dir.$file : $file; |
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} |
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} |
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return $_filedata; |
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} |
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else |
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{ |
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return FALSE; |
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} |
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} |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Get Directory File Information |
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* |
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* Reads the specified directory and builds an array containing the filenames, |
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* filesize, dates, and permissions |
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* |
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* Any sub-folders contained within the specified path are read as well. |
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* |
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* @access public |
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* @param string path to source |
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* @param bool Look only at the top level directory specified? |
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* @param bool internal variable to determine recursion status - do not use in calls |
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* @return array |
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*/ |
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if ( ! function_exists('get_dir_file_info')) |
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{ |
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function get_dir_file_info($source_dir, $top_level_only = TRUE, $_recursion = FALSE) |
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{ |
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static $_filedata = array(); |
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$relative_path = $source_dir; |
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if ($fp = @opendir($source_dir)) |
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{ |
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// reset the array and make sure $source_dir has a trailing slash on the initial call |
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if ($_recursion === FALSE) |
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{ |
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$_filedata = array(); |
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$source_dir = rtrim(realpath($source_dir), DIRECTORY_SEPARATOR).DIRECTORY_SEPARATOR; |
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} |
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// foreach (scandir($source_dir, 1) as $file) // In addition to being PHP5+, scandir() is simply not as fast |
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while (FALSE !== ($file = readdir($fp))) |
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{ |
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if (@is_dir($source_dir.$file) AND strncmp($file, '.', 1) !== 0 AND $top_level_only === FALSE) |
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{ |
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get_dir_file_info($source_dir.$file.DIRECTORY_SEPARATOR, $top_level_only, TRUE); |
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} |
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elseif (strncmp($file, '.', 1) !== 0) |
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{ |
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$_filedata[$file] = get_file_info($source_dir.$file); |
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$_filedata[$file]['relative_path'] = $relative_path; |
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} |
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} |
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return $_filedata; |
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} |
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else |
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{ |
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return FALSE; |
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} |
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} |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Get File Info |
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* |
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* Given a file and path, returns the name, path, size, date modified |
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* Second parameter allows you to explicitly declare what information you want returned |
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* Options are: name, server_path, size, date, readable, writable, executable, fileperms |
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* Returns FALSE if the file cannot be found. |
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* |
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* @access public |
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* @param string path to file |
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* @param mixed array or comma separated string of information returned |
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* @return array |
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*/ |
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if ( ! function_exists('get_file_info')) |
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{ |
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function get_file_info($file, $returned_values = array('name', 'server_path', 'size', 'date')) |
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{ |
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if ( ! file_exists($file)) |
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{ |
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return FALSE; |
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} |
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if (is_string($returned_values)) |
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{ |
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$returned_values = explode(',', $returned_values); |
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} |
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foreach ($returned_values as $key) |
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{ |
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switch ($key) |
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{ |
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case 'name': |
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$fileinfo['name'] = substr(strrchr($file, DIRECTORY_SEPARATOR), 1); |
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break; |
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case 'server_path': |
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$fileinfo['server_path'] = $file; |
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break; |
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case 'size': |
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$fileinfo['size'] = filesize($file); |
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break; |
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case 'date': |
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$fileinfo['date'] = filemtime($file); |
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break; |
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case 'readable': |
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$fileinfo['readable'] = is_readable($file); |
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break; |
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case 'writable': |
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// There are known problems using is_weritable on IIS. It may not be reliable - consider fileperms() |
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$fileinfo['writable'] = is_writable($file); |
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break; |
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case 'executable': |
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$fileinfo['executable'] = is_executable($file); |
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break; |
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case 'fileperms': |
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$fileinfo['fileperms'] = fileperms($file); |
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break; |
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} |
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} |
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return $fileinfo; |
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} |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Get Mime by Extension |
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* |
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* Translates a file extension into a mime type based on config/mimes.php. |
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* Returns FALSE if it can't determine the type, or open the mime config file |
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* |
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* Note: this is NOT an accurate way of determining file mime types, and is here strictly as a convenience |
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* It should NOT be trusted, and should certainly NOT be used for security |
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* |
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* @access public |
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* @param string path to file |
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* @return mixed |
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*/ |
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if ( ! function_exists('get_mime_by_extension')) |
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{ |
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function get_mime_by_extension($file) |
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{ |
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$extension = strtolower(substr(strrchr($file, '.'), 1)); |
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global $mimes; |
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if ( ! is_array($mimes)) |
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{ |
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if (defined('ENVIRONMENT') AND is_file(APPPATH.'config/'.ENVIRONMENT.'/mimes.php')) |
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{ |
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include(APPPATH.'config/'.ENVIRONMENT.'/mimes.php'); |
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} |
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elseif (is_file(APPPATH.'config/mimes.php')) |
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{ |
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include(APPPATH.'config/mimes.php'); |
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} |
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if ( ! is_array($mimes)) |
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{ |
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return FALSE; |
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} |
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} |
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if (array_key_exists($extension, $mimes)) |
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{ |
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if (is_array($mimes[$extension])) |
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{ |
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// Multiple mime types, just give the first one |
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return current($mimes[$extension]); |
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} |
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else |
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{ |
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return $mimes[$extension]; |
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} |
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} |
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else |
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{ |
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return FALSE; |
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} |
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} |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Symbolic Permissions |
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* |
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* Takes a numeric value representing a file's permissions and returns |
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* standard symbolic notation representing that value |
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* |
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* @access public |
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* @param int |
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* @return string |
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*/ |
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if ( ! function_exists('symbolic_permissions')) |
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{ |
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function symbolic_permissions($perms) |
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{ |
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if (($perms & 0xC000) == 0xC000) |
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{ |
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$symbolic = 's'; // Socket |
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} |
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elseif (($perms & 0xA000) == 0xA000) |
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{ |
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$symbolic = 'l'; // Symbolic Link |
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} |
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elseif (($perms & 0x8000) == 0x8000) |
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{ |
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$symbolic = '-'; // Regular |
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} |
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elseif (($perms & 0x6000) == 0x6000) |
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{ |
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$symbolic = 'b'; // Block special |
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} |
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elseif (($perms & 0x4000) == 0x4000) |
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{ |
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$symbolic = 'd'; // Directory |
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} |
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elseif (($perms & 0x2000) == 0x2000) |
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{ |
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$symbolic = 'c'; // Character special |
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} |
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elseif (($perms & 0x1000) == 0x1000) |
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{ |
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$symbolic = 'p'; // FIFO pipe |
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} |
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else |
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{ |
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$symbolic = 'u'; // Unknown |
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} |
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// Owner |
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$symbolic .= (($perms & 0x0100) ? 'r' : '-'); |
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$symbolic .= (($perms & 0x0080) ? 'w' : '-'); |
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$symbolic .= (($perms & 0x0040) ? (($perms & 0x0800) ? 's' : 'x' ) : (($perms & 0x0800) ? 'S' : '-')); |
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// Group |
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$symbolic .= (($perms & 0x0020) ? 'r' : '-'); |
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$symbolic .= (($perms & 0x0010) ? 'w' : '-'); |
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$symbolic .= (($perms & 0x0008) ? (($perms & 0x0400) ? 's' : 'x' ) : (($perms & 0x0400) ? 'S' : '-')); |
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// World |
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$symbolic .= (($perms & 0x0004) ? 'r' : '-'); |
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$symbolic .= (($perms & 0x0002) ? 'w' : '-'); |
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$symbolic .= (($perms & 0x0001) ? (($perms & 0x0200) ? 't' : 'x' ) : (($perms & 0x0200) ? 'T' : '-')); |
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return $symbolic; |
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} |
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} |
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// -------------------------------------------------------------------- |
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/** |
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* Octal Permissions |
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* |
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* Takes a numeric value representing a file's permissions and returns |
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* a three character string representing the file's octal permissions |
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* |
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* @access public |
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* @param int |
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* @return string |
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*/ |
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if ( ! function_exists('octal_permissions')) |
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{ |
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function octal_permissions($perms) |
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{ |
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return substr(sprintf('%o', $perms), -3); |
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} |
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} |
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/* End of file file_helper.php */ |
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/* Location: ./system/helpers/file_helper.php */ |