470 行
无行尾
11 KiB
PHP
470 行
无行尾
11 KiB
PHP
<?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 ( ! require_once(APPPATH.'config/mimes.php'))
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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 */ |