/system/helpers/file_helper.php
PHP | 402 lines | 202 code | 51 blank | 149 comment | 57 complexity | 0b718179d82b4b04f4043947c69a2e56 MD5 | raw file
- <?php if (!defined('BASEPATH')) exit('No direct script access allowed');
- /**
- * CodeIgniter
- *
- * An open source application development framework for PHP 5.1.6 or newer
- *
- * @package CodeIgniter
- * @author ExpressionEngine Dev Team
- * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @link http://codeigniter.com
- * @since Version 1.0
- * @filesource
- */
- // ------------------------------------------------------------------------
- /**
- * CodeIgniter File Helpers
- *
- * @package CodeIgniter
- * @subpackage Helpers
- * @category Helpers
- * @author ExpressionEngine Dev Team
- * @link http://codeigniter.com/user_guide/helpers/file_helpers.html
- */
- // ------------------------------------------------------------------------
- /**
- * Read File
- *
- * Opens the file specfied in the path and returns it as a string.
- *
- * @access public
- * @param string path to file
- * @return string
- */
- if (!function_exists('read_file')) {
- function read_file($file) {
- if (!file_exists($file)) {
- return FALSE;
- }
- if (function_exists('file_get_contents')) {
- return file_get_contents($file);
- }
- if (!$fp = @fopen($file, FOPEN_READ)) {
- return FALSE;
- }
- flock($fp, LOCK_SH);
- $data = '';
- if (filesize($file) > 0) {
- $data =& fread($fp, filesize($file));
- }
- flock($fp, LOCK_UN);
- fclose($fp);
- return $data;
- }
- }
- // ------------------------------------------------------------------------
- /**
- * Write File
- *
- * Writes data to the file specified in the path.
- * Creates a new file if non-existent.
- *
- * @access public
- * @param string path to file
- * @param string file data
- * @return bool
- */
- if (!function_exists('write_file')) {
- function write_file($path, $data, $mode = FOPEN_WRITE_CREATE_DESTRUCTIVE) {
- if (!$fp = @fopen($path, $mode)) {
- return FALSE;
- }
- flock($fp, LOCK_EX);
- fwrite($fp, $data);
- flock($fp, LOCK_UN);
- fclose($fp);
- return TRUE;
- }
- }
- // ------------------------------------------------------------------------
- /**
- * Delete Files
- *
- * Deletes all files contained in the supplied directory path.
- * Files must be writable or owned by the system in order to be deleted.
- * If the second parameter is set to TRUE, any directories contained
- * within the supplied base directory will be nuked as well.
- *
- * @access public
- * @param string path to file
- * @param bool whether to delete any directories found in the path
- * @return bool
- */
- if (!function_exists('delete_files')) {
- function delete_files($path, $del_dir = FALSE, $level = 0) {
- // Trim the trailing slash
- $path = rtrim($path, DIRECTORY_SEPARATOR);
- if (!$current_dir = @opendir($path)) {
- return FALSE;
- }
- while (FALSE !== ($filename = @readdir($current_dir))) {
- if ($filename != "." and $filename != "..") {
- if (is_dir($path . DIRECTORY_SEPARATOR . $filename)) {
- // Ignore empty folders
- if (substr($filename, 0, 1) != '.') {
- delete_files($path . DIRECTORY_SEPARATOR . $filename, $del_dir, $level + 1);
- }
- } else {
- unlink($path . DIRECTORY_SEPARATOR . $filename);
- }
- }
- }
- @closedir($current_dir);
- if ($del_dir == TRUE AND $level > 0) {
- return @rmdir($path);
- }
- return TRUE;
- }
- }
- // ------------------------------------------------------------------------
- /**
- * 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.
- *
- * @access public
- * @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
- */
- if (!function_exists('get_filenames')) {
- 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 . $file) && strncmp($file, '.', 1) !== 0) {
- get_filenames($source_dir . $file . DIRECTORY_SEPARATOR, $include_path, TRUE);
- } elseif (strncmp($file, '.', 1) !== 0) {
- $_filedata[] = ($include_path == TRUE) ? $source_dir . $file : $file;
- }
- }
- return $_filedata;
- } else {
- return FALSE;
- }
- }
- }
- // --------------------------------------------------------------------
- /**
- * Get Directory File Information
- *
- * Reads the specified directory and builds an array containing the filenames,
- * filesize, dates, and permissions
- *
- * Any sub-folders contained within the specified path are read as well.
- *
- * @access public
- * @param string path to source
- * @param bool Look only at the top level directory specified?
- * @param bool internal variable to determine recursion status - do not use in calls
- * @return array
- */
- if (!function_exists('get_dir_file_info')) {
- function get_dir_file_info($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;
- }
- // foreach (scandir($source_dir, 1) as $file) // In addition to being PHP5+, scandir() is simply not as fast
- while (FALSE !== ($file = readdir($fp))) {
- if (@is_dir($source_dir . $file) AND strncmp($file, '.', 1) !== 0 AND $top_level_only === FALSE) {
- get_dir_file_info($source_dir . $file . DIRECTORY_SEPARATOR, $top_level_only, TRUE);
- } elseif (strncmp($file, '.', 1) !== 0) {
- $_filedata[$file] = get_file_info($source_dir . $file);
- $_filedata[$file]['relative_path'] = $relative_path;
- }
- }
- return $_filedata;
- } else {
- return FALSE;
- }
- }
- }
- // --------------------------------------------------------------------
- /**
- * Get File Info
- *
- * Given a file and path, returns the name, path, size, date modified
- * Second parameter allows you to explicitly declare what information you want returned
- * Options are: name, server_path, size, date, readable, writable, executable, fileperms
- * Returns FALSE if the file cannot be found.
- *
- * @access public
- * @param string path to file
- * @param mixed array or comma separated string of information returned
- * @return array
- */
- if (!function_exists('get_file_info')) {
- function get_file_info($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':
- $fileinfo['name'] = substr(strrchr($file, DIRECTORY_SEPARATOR), 1);
- 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':
- // There are known problems using is_weritable on IIS. It may not be reliable - consider fileperms()
- $fileinfo['writable'] = is_writable($file);
- break;
- case 'executable':
- $fileinfo['executable'] = is_executable($file);
- break;
- case 'fileperms':
- $fileinfo['fileperms'] = fileperms($file);
- break;
- }
- }
- return $fileinfo;
- }
- }
- // --------------------------------------------------------------------
- /**
- * Get Mime by Extension
- *
- * Translates a file extension into a mime type based on config/mimes.php.
- * Returns FALSE if it can't determine the type, or open the mime config file
- *
- * Note: this is NOT an accurate way of determining file mime types, and is here strictly as a convenience
- * It should NOT be trusted, and should certainly NOT be used for security
- *
- * @access public
- * @param string path to file
- * @return mixed
- */
- if (!function_exists('get_mime_by_extension')) {
- function get_mime_by_extension($file) {
- $extension = strtolower(substr(strrchr($file, '.'), 1));
- global $mimes;
- if (!is_array($mimes)) {
- if (defined('ENVIRONMENT') AND is_file(APPPATH . 'config/' . ENVIRONMENT . '/mimes.php')) {
- include(APPPATH . 'config/' . ENVIRONMENT . '/mimes.php');
- } elseif (is_file(APPPATH . 'config/mimes.php')) {
- include(APPPATH . 'config/mimes.php');
- }
- if (!is_array($mimes)) {
- return FALSE;
- }
- }
- if (array_key_exists($extension, $mimes)) {
- if (is_array($mimes[$extension])) {
- // Multiple mime types, just give the first one
- return current($mimes[$extension]);
- } else {
- return $mimes[$extension];
- }
- } else {
- return FALSE;
- }
- }
- }
- // --------------------------------------------------------------------
- /**
- * Symbolic Permissions
- *
- * Takes a numeric value representing a file's permissions and returns
- * standard symbolic notation representing that value
- *
- * @access public
- * @param int
- * @return string
- */
- if (!function_exists('symbolic_permissions')) {
- 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' : '-');
- $symbolic .= (($perms & 0x0080) ? 'w' : '-');
- $symbolic .= (($perms & 0x0040) ? (($perms & 0x0800) ? 's' : 'x') : (($perms & 0x0800) ? 'S' : '-'));
- // Group
- $symbolic .= (($perms & 0x0020) ? 'r' : '-');
- $symbolic .= (($perms & 0x0010) ? 'w' : '-');
- $symbolic .= (($perms & 0x0008) ? (($perms & 0x0400) ? 's' : 'x') : (($perms & 0x0400) ? 'S' : '-'));
- // World
- $symbolic .= (($perms & 0x0004) ? 'r' : '-');
- $symbolic .= (($perms & 0x0002) ? 'w' : '-');
- $symbolic .= (($perms & 0x0001) ? (($perms & 0x0200) ? 't' : 'x') : (($perms & 0x0200) ? 'T' : '-'));
- return $symbolic;
- }
- }
- // --------------------------------------------------------------------
- /**
- * Octal Permissions
- *
- * Takes a numeric value representing a file's permissions and returns
- * a three character string representing the file's octal permissions
- *
- * @access public
- * @param int
- * @return string
- */
- if (!function_exists('octal_permissions')) {
- function octal_permissions($perms) {
- return substr(sprintf('%o', $perms), -3);
- }
- }
- /* End of file file_helper.php */
- /* Location: ./system/helpers/file_helper.php */