542 lines
11 KiB
PHP
542 lines
11 KiB
PHP
<?php
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/**
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* Convenience class for reading, writing and appending to files.
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*
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* PHP versions 4 and 5
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*
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* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
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* Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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*
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* Licensed under The MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @copyright Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
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* @link http://cakephp.org CakePHP(tm) Project
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* @package cake
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* @subpackage cake.cake.libs
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* @since CakePHP(tm) v 0.2.9
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* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
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*/
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/**
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* Included libraries.
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*
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*/
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if (!class_exists('Object')) {
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require LIBS . 'object.php';
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}
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if (!class_exists('Folder')) {
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require LIBS . 'folder.php';
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}
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/**
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* Convenience class for reading, writing and appending to files.
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*
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* @package cake
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* @subpackage cake.cake.libs
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*/
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class File extends Object {
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/**
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* Folder object of the File
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*
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* @var Folder
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* @access public
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*/
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var $Folder = null;
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/**
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* Filename
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*
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* @var string
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* @access public
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*/
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var $name = null;
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/**
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* file info
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*
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* @var string
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* @access public
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*/
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var $info = array();
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/**
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* Holds the file handler resource if the file is opened
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*
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* @var resource
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* @access public
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*/
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var $handle = null;
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/**
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* enable locking for file reading and writing
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*
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* @var boolean
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* @access public
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*/
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var $lock = null;
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/**
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* path property
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*
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* Current file's absolute path
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*
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* @var mixed null
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* @access public
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*/
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var $path = null;
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/**
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* Constructor
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*
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* @param string $path Path to file
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* @param boolean $create Create file if it does not exist (if true)
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* @param integer $mode Mode to apply to the folder holding the file
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*/
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function __construct($path, $create = false, $mode = 0755) {
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parent::__construct();
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$this->Folder =& new Folder(dirname($path), $create, $mode);
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if (!is_dir($path)) {
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$this->name = basename($path);
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}
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$this->pwd();
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$create && !$this->exists() && $this->safe($path) && $this->create();
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}
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/**
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* Closes the current file if it is opened
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*
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*/
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function __destruct() {
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$this->close();
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}
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/**
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* Creates the File.
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*
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* @return boolean Success
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* @access public
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*/
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function create() {
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$dir = $this->Folder->pwd();
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if (is_dir($dir) && is_writable($dir) && !$this->exists()) {
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$old = umask(0);
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if (touch($this->path)) {
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umask($old);
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return true;
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}
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}
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return false;
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}
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/**
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* Opens the current file with a given $mode
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*
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* @param string $mode A valid 'fopen' mode string (r|w|a ...)
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* @param boolean $force If true then the file will be re-opened even if its already opened, otherwise it won't
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* @return boolean True on success, false on failure
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* @access public
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*/
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function open($mode = 'r', $force = false) {
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if (!$force && is_resource($this->handle)) {
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return true;
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}
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clearstatcache();
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if ($this->exists() === false) {
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if ($this->create() === false) {
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return false;
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}
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}
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$this->handle = fopen($this->path, $mode);
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if (is_resource($this->handle)) {
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return true;
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}
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return false;
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}
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/**
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* Return the contents of this File as a string.
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*
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* @param string $bytes where to start
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* @param string $mode A `fread` compatible mode.
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* @param boolean $force If true then the file will be re-opened even if its already opened, otherwise it won't
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* @return mixed string on success, false on failure
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* @access public
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*/
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function read($bytes = false, $mode = 'rb', $force = false) {
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if ($bytes === false && $this->lock === null) {
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return file_get_contents($this->path);
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}
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if ($this->open($mode, $force) === false) {
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return false;
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}
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if ($this->lock !== null && flock($this->handle, LOCK_SH) === false) {
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return false;
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}
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if (is_int($bytes)) {
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return fread($this->handle, $bytes);
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}
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$data = '';
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while (!feof($this->handle)) {
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$data .= fgets($this->handle, 4096);
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}
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if ($this->lock !== null) {
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flock($this->handle, LOCK_UN);
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}
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if ($bytes === false) {
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$this->close();
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}
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return trim($data);
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}
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/**
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* Sets or gets the offset for the currently opened file.
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*
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* @param mixed $offset The $offset in bytes to seek. If set to false then the current offset is returned.
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* @param integer $seek PHP Constant SEEK_SET | SEEK_CUR | SEEK_END determining what the $offset is relative to
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* @return mixed True on success, false on failure (set mode), false on failure or integer offset on success (get mode)
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* @access public
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*/
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function offset($offset = false, $seek = SEEK_SET) {
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if ($offset === false) {
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if (is_resource($this->handle)) {
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return ftell($this->handle);
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}
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} elseif ($this->open() === true) {
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return fseek($this->handle, $offset, $seek) === 0;
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}
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return false;
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}
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/**
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* Prepares a ascii string for writing. Converts line endings to the
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* correct terminator for the current platform. If windows "\r\n" will be used
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* all other platforms will use "\n"
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*
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* @param string $data Data to prepare for writing.
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* @return string The with converted line endings.
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* @access public
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*/
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function prepare($data, $forceWindows = false) {
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$lineBreak = "\n";
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if (DIRECTORY_SEPARATOR == '\\' || $forceWindows === true) {
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$lineBreak = "\r\n";
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}
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return strtr($data, array("\r\n" => $lineBreak, "\n" => $lineBreak, "\r" => $lineBreak));
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}
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/**
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* Write given data to this File.
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*
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* @param string $data Data to write to this File.
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* @param string $mode Mode of writing. {@link http://php.net/fwrite See fwrite()}.
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* @param string $force force the file to open
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* @return boolean Success
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* @access public
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*/
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function write($data, $mode = 'w', $force = false) {
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$success = false;
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if ($this->open($mode, $force) === true) {
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if ($this->lock !== null) {
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if (flock($this->handle, LOCK_EX) === false) {
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return false;
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}
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}
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if (fwrite($this->handle, $data) !== false) {
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$success = true;
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}
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if ($this->lock !== null) {
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flock($this->handle, LOCK_UN);
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}
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}
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return $success;
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}
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/**
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* Append given data string to this File.
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*
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* @param string $data Data to write
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* @param string $force force the file to open
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* @return boolean Success
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* @access public
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*/
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function append($data, $force = false) {
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return $this->write($data, 'a', $force);
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}
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/**
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* Closes the current file if it is opened.
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*
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* @return boolean True if closing was successful or file was already closed, otherwise false
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* @access public
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*/
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function close() {
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if (!is_resource($this->handle)) {
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return true;
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}
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return fclose($this->handle);
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}
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/**
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* Deletes the File.
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*
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* @return boolean Success
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* @access public
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*/
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function delete() {
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clearstatcache();
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if ($this->exists()) {
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return unlink($this->path);
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}
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return false;
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}
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/**
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* Returns the File info.
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*
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* @return string The File extension
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* @access public
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*/
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function info() {
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if ($this->info == null) {
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$this->info = pathinfo($this->path);
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}
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if (!isset($this->info['filename'])) {
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$this->info['filename'] = $this->name();
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}
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return $this->info;
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}
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/**
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* Returns the File extension.
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*
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* @return string The File extension
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* @access public
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*/
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function ext() {
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if ($this->info == null) {
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$this->info();
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}
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if (isset($this->info['extension'])) {
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return $this->info['extension'];
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}
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return false;
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}
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/**
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* Returns the File name without extension.
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*
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* @return string The File name without extension.
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* @access public
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*/
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function name() {
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if ($this->info == null) {
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$this->info();
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}
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if (isset($this->info['extension'])) {
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return basename($this->name, '.'.$this->info['extension']);
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} elseif ($this->name) {
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return $this->name;
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}
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return false;
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}
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/**
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* makes filename safe for saving
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*
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* @param string $name The name of the file to make safe if different from $this->name
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* @param strin $ext The name of the extension to make safe if different from $this->ext
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* @return string $ext the extension of the file
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* @access public
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*/
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function safe($name = null, $ext = null) {
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if (!$name) {
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$name = $this->name;
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}
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if (!$ext) {
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$ext = $this->ext();
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}
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return preg_replace( "/(?:[^\w\.-]+)/", "_", basename($name, $ext));
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}
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/**
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* Get md5 Checksum of file with previous check of Filesize
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*
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* @param mixed $maxsize in MB or true to force
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* @return string md5 Checksum {@link http://php.net/md5_file See md5_file()}
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* @access public
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*/
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function md5($maxsize = 5) {
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if ($maxsize === true) {
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return md5_file($this->path);
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}
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$size = $this->size();
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if ($size && $size < ($maxsize * 1024) * 1024) {
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return md5_file($this->path);
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}
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return false;
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}
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/**
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* Returns the full path of the File.
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*
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* @return string Full path to file
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* @access public
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*/
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function pwd() {
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if (is_null($this->path)) {
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$this->path = $this->Folder->slashTerm($this->Folder->pwd()) . $this->name;
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}
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return $this->path;
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}
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/**
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* Returns true if the File exists.
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*
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* @return boolean true if it exists, false otherwise
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* @access public
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*/
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function exists() {
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return (file_exists($this->path) && is_file($this->path));
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}
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/**
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* Returns the "chmod" (permissions) of the File.
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*
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* @return string Permissions for the file
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* @access public
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*/
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function perms() {
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if ($this->exists()) {
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return substr(sprintf('%o', fileperms($this->path)), -4);
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}
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return false;
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}
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/**
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* Returns the Filesize
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*
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* @return integer size of the file in bytes, or false in case of an error
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* @access public
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*/
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function size() {
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if ($this->exists()) {
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return filesize($this->path);
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}
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return false;
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}
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/**
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* Returns true if the File is writable.
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*
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* @return boolean true if its writable, false otherwise
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* @access public
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*/
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function writable() {
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return is_writable($this->path);
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}
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/**
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* Returns true if the File is executable.
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*
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* @return boolean true if its executable, false otherwise
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* @access public
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*/
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function executable() {
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return is_executable($this->path);
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}
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/**
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* Returns true if the File is readable.
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*
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* @return boolean true if file is readable, false otherwise
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* @access public
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*/
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function readable() {
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return is_readable($this->path);
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}
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/**
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* Returns the File's owner.
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*
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* @return integer the Fileowner
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* @access public
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*/
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function owner() {
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if ($this->exists()) {
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return fileowner($this->path);
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}
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return false;
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}
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/**
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* Returns the File's group.
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*
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* @return integer the Filegroup
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* @access public
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*/
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function group() {
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if ($this->exists()) {
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return filegroup($this->path);
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}
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return false;
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}
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/**
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* Returns last access time.
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*
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* @return integer timestamp Timestamp of last access time
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* @access public
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*/
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function lastAccess() {
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if ($this->exists()) {
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return fileatime($this->path);
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}
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return false;
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}
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/**
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* Returns last modified time.
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*
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* @return integer timestamp Timestamp of last modification
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* @access public
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*/
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function lastChange() {
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if ($this->exists()) {
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return filemtime($this->path);
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}
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return false;
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}
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/**
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* Returns the current folder.
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*
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* @return Folder Current folder
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* @access public
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*/
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function &Folder() {
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return $this->Folder;
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}
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/**
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* Copy the File to $dest
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*
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* @param string $dest destination for the copy
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* @param boolean $overwrite Overwrite $dest if exists
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* @return boolean Succes
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* @access public
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*/
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function copy($dest, $overwrite = true) {
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if (!$this->exists() || is_file($dest) && !$overwrite) {
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return false;
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}
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return copy($this->path, $dest);
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}
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}
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