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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* File::Util
*
* PHP versions 4 and 5
*
* LICENSE: This source file is subject to version 3.0 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_0.txt. If you did not receive a copy of
* the PHP License and are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately.
*
* @category File
* @package File
* @author Michael Wallner <mike@php.net>
* @copyright 2004-2005 Michael Wallner
* @license http://www.php.net/license/3_0.txt PHP License 3.0
* @version CVS: $Id: Util.php 309134 2011-03-12 16:45:50Z dufuz $
* @link http://pear.php.net/package/File
*/
/**#@+
* Sorting Constants
*/
define('FILE_SORT_NONE', 0);
define('FILE_SORT_REVERSE', 1);
define('FILE_SORT_NAME', 2);
define('FILE_SORT_SIZE', 4);
define('FILE_SORT_DATE', 8);
define('FILE_SORT_RANDOM', 16);
/**#@-*/
/**#@+
* Listing Constants
*/
define('FILE_LIST_FILES', 1);
define('FILE_LIST_DIRS', 2);
define('FILE_LIST_DOTS', 4);
define('FILE_LIST_ALL', FILE_LIST_FILES | FILE_LIST_DIRS | FILE_LIST_DOTS);
/**#@-*/
/**
* @ignore
*/
define('FILE_WIN32', defined('OS_WINDOWS') ? OS_WINDOWS : !strncasecmp(PHP_OS, 'win', 3));
/**
* File_Util
*
* File and directory utility functions.
*
* @access public
* @static
*/
class File_Util
{
/**
* Returns a string path built from the array $pathParts. Where a join
* occurs multiple separators are removed. Joins using the optional
* separator, defaulting to the PHP DIRECTORY_SEPARATOR constant.
*
* @static
* @access public
* @param array $parts Array containing the parts to be joined
* @param string $separator The directory seperator
*/
function buildPath($parts, $separator = DIRECTORY_SEPARATOR)
{
$qs = '/^'. preg_quote($separator, '/') .'+$/';
for ($i = 0, $c = count($parts); $i < $c; $i++) {
if (!strlen($parts[$i]) || preg_match($qs, $parts[$i])) {
unset($parts[$i]);
} elseif (0 == $i) {
$parts[$i] = rtrim($parts[$i], $separator);
} elseif ($c - 1 == $i) {
$parts[$i] = ltrim($parts[$i], $separator);
} else {
$parts[$i] = trim($parts[$i], $separator);
}
}
return implode($separator, $parts);
}
/**
* Returns a path without leading / or C:\. If this is not
* present the path is returned as is.
*
* @static
* @access public
* @param string $path The path to be processed
* @return string The processed path or the path as is
*/
function skipRoot($path)
{
if (File_Util::isAbsolute($path)) {
if (FILE_WIN32) {
return substr($path, $path{3} == '\\' ? 4 : 3);
}
return ltrim($path, '/');
}
return $path;
}
/**
* Returns the temp directory according to either the TMP, TMPDIR, or
* TEMP env variables. If these are not set it will also check for the
* existence of /tmp, %WINDIR%\temp
*
* @static
* @access public
* @return string The system tmp directory
*/
function tmpDir()
{
if (FILE_WIN32) {
if (isset($_ENV['TEMP'])) {
return $_ENV['TEMP'];
}
if (isset($_ENV['TMP'])) {
return $_ENV['TMP'];
}
if (isset($_ENV['windir'])) {
return $_ENV['windir'] . '\\temp';
}
if (isset($_ENV['SystemRoot'])) {
return $_ENV['SystemRoot'] . '\\temp';
}
if (isset($_SERVER['TEMP'])) {
return $_SERVER['TEMP'];
}
if (isset($_SERVER['TMP'])) {
return $_SERVER['TMP'];
}
if (isset($_SERVER['windir'])) {
return $_SERVER['windir'] . '\\temp';
}
if (isset($_SERVER['SystemRoot'])) {
return $_SERVER['SystemRoot'] . '\\temp';
}
return '\temp';
}
if (isset($_ENV['TMPDIR'])) {
return $_ENV['TMPDIR'];
}
if (isset($_SERVER['TMPDIR'])) {
return $_SERVER['TMPDIR'];
}
return '/tmp';
}
/**
* Returns a temporary filename using tempnam() and File::tmpDir().
*
* @static
* @access public
* @param string $dirname Optional directory name for the tmp file
* @return string Filename and path of the tmp file
*/
function tmpFile($dirname = null)
{
if (!isset($dirname)) {
$dirname = File_Util::tmpDir();
}
return tempnam($dirname, 'temp.');
}
/**
* Returns boolean based on whether given path is absolute or not.
*
* @static
* @access public
* @param string $path Given path
* @return boolean True if the path is absolute, false if it is not
*/
function isAbsolute($path)
{
if (preg_match('/(?:\/|\\\)\.\.(?=\/|$)/', $path)) {
return false;
}
if (FILE_WIN32) {
return (($path{0} == '/') || preg_match('/^[a-zA-Z]:(\\\|\/)/', $path));
}
return ($path{0} == '/') || ($path{0} == '~');
}
/**
* Checks for a file's existence, taking the current include path
* into consideration
*
* This method can be called statically
* (e.g., File_Util::isIncludable('config.php'))
*
* @param string $file
* @param string $sep the directory separator (optional)
* @return string the includable path
* @access public
* @static
*/
function isIncludable($file, $sep = DIRECTORY_SEPARATOR)
{
foreach ((array) explode(PATH_SEPARATOR, ini_get('include_path')) as $path) {
if (file_exists($path .= $sep . $file)) {
return $path;
}
}
if (file_exists($file)) {
return $file;
}
return null;
}
/**
* Get path relative to another path
*
* @static
* @access public
* @return string
* @param string $path
* @param string $root
* @param string $separator
*/
function relativePath($path, $root, $separator = DIRECTORY_SEPARATOR)
{
$path = File_Util::realpath($path, $separator);
$root = File_Util::realpath($root, $separator);
$dirs = explode($separator, $path);
$comp = explode($separator, $root);
if (FILE_WIN32) {
if (strcasecmp($dirs[0], $comp[0])) {
return $path;
}
unset($dirs[0], $comp[0]);
}
foreach ($comp as $i => $part) {
if (isset($dirs[$i]) && $part == $dirs[$i]) {
unset($dirs[$i], $comp[$i]);
} else {
break;
}
}
return str_repeat('..' . $separator, count($comp)) . implode($separator, $dirs);
}
/**
* Get real path (works with non-existant paths)
*
* @static
* @access public
* @return string
* @param string $path
* @param string $separator
*/
function realPath($path, $separator = DIRECTORY_SEPARATOR)
{
if (!strlen($path)) {
return $separator;
}
$drive = '';
$path = preg_replace('/[\\\\\/]/', $separator, $path);
if (FILE_WIN32) {
if (preg_match('/([a-zA-Z]\:)(.*)/', $path, $matches)) {
$drive = $matches[1];
$path = $matches[2];
} else {
$cwd = getcwd();
$drive = substr($cwd, 0, 2);
if ($path{0} !== $separator{0}) {
$path = substr($cwd, 3) . $separator . $path;
}
}
} elseif ($path{0} !== $separator) {
$path = getcwd() . $separator . $path;
}
$dirStack = array();
foreach (explode($separator, $path) as $dir) {
if (strlen($dir) && $dir !== '.') {
if ($dir == '..') {
array_pop($dirStack);
} else {
$dirStack[] = $dir;
}
}
}
return $drive . $separator . implode($separator, $dirStack);
}
/**
* Check whether path is in root path
*
* @static
* @access public
* @return bool
* @param string $path
* @param string $root
*/
function pathInRoot($path, $root)
{
static $realPaths = array();
if (!isset($realPaths[$root])) {
$realPaths[$root] = File_Util::realPath($root);
}
return false !== strstr(File_Util::realPath($path), $realPaths[$root]);
}
/**
* List Directory
*
* The final argument, $cb, is a callback that either evaluates to true or
* false and performs a filter operation, or it can also modify the
* directory/file names returned. To achieve the latter effect use as
* follows:
*
* <code>
* <?php
* function uc(&$filename) {
* $filename = strtoupper($filename);
* return true;
* }
* $entries = File_Util::listDir('.', FILE_LIST_ALL, FILE_SORT_NONE, 'uc');
* foreach ($entries as $e) {
* echo $e->name, "\n";
* }
* ?>
* </code>
*
* @static
* @access public
* @return array
* @param string $path
* @param int $list
* @param int $sort
* @param mixed $cb
*/
function listDir($path, $list = FILE_LIST_ALL, $sort = FILE_SORT_NONE, $cb = null)
{
if (!strlen($path) || !is_dir($path)) {
return null;
}
$entries = array();
for ($dir = dir($path); false !== $entry = $dir->read(); ) {
if ($list & FILE_LIST_DOTS || $entry{0} !== '.') {
$isRef = ($entry === '.' || $entry === '..');
$isDir = $isRef || is_dir($path .'/'. $entry);
if ( ((!$isDir && $list & FILE_LIST_FILES) ||
($isDir && $list & FILE_LIST_DIRS)) &&
(!is_callable($cb) ||
call_user_func_array($cb, array(&$entry)))) {
$entries[] = (object) array(
'name' => $entry,
'size' => $isDir ? null : filesize($path .'/'. $entry),
'date' => filemtime($path .'/'. $entry),
);
}
}
}
$dir->close();
if ($sort) {
$entries = File_Util::sortFiles($entries, $sort);
}
return $entries;
}
/**
* Sort Files
*
* @static
* @access public
* @return array
* @param array $files
* @param int $sort
*/
function sortFiles($files, $sort)
{
if (!$files) {
return array();
}
if (!$sort) {
return $files;
}
if ($sort === 1) {
return array_reverse($files);
}
if ($sort & FILE_SORT_RANDOM) {
shuffle($files);
return $files;
}
$names = array();
$sizes = array();
$dates = array();
if ($sort & FILE_SORT_NAME) {
$r = &$names;
} elseif ($sort & FILE_SORT_DATE) {
$r = &$dates;
} elseif ($sort & FILE_SORT_SIZE) {
$r = &$sizes;
} else {
asort($files, SORT_REGULAR);
return $files;
}
$sortFlags = array(
FILE_SORT_NAME => SORT_STRING,
FILE_SORT_DATE => SORT_NUMERIC,
FILE_SORT_SIZE => SORT_NUMERIC,
);
foreach ($files as $file) {
$names[] = $file->name;
$sizes[] = $file->size;
$dates[] = $file->date;
}
if ($sort & FILE_SORT_REVERSE) {
arsort($r, $sortFlags[$sort & ~1]);
} else {
asort($r, $sortFlags[$sort]);
}
$result = array();
foreach ($r as $i => $f) {
$result[] = $files[$i];
}
return $result;
}
/**
* Switch File Extension
*
* @static
* @access public
* @return string|array
* @param string|array $filename
* @param string $to new file extension
* @param string $from change only files with this extension
* @param bool $reverse change only files not having $from extension
*/
function switchExt($filename, $to, $from = null, $reverse = false)
{
if (is_array($filename)) {
foreach ($filename as $key => $file) {
$filename[$key] = File_Util::switchExt($file, $to, $from);
}
return $filename;
}
if ($len = strlen($from)) {
$ext = substr($filename, -$len - 1);
$cfn = FILE_WIN32 ? 'strcasecmp' : 'strcmp';
if (!$reverse == $cfn($ext, '.'. $from)) {
return $filename;
}
return substr($filename, 0, -$len - 1) .'.'. $to;
}
if ($pos = strpos($filename, '.')) {
return substr($filename, 0, $pos) .'.'. $to;
}
return $filename .'.'. $to;
}
/**
* Returns the filesize using a prefix like "kilo", "mebi" or "giga"
*
* @author Christian Weiske <cweiske@cweiske.de>
*
* @param integer $size The size to convert
* @param integer $decimals The number of decimals to use
* @param boolean $long Use long names (kilobyte) instead of
* short ones (kB)
* @param boolean $oldStyle If the old style should be used
* @param boolean $useBiBytes If the "BiBytes" names should be
* used [applies only to !$bOldStyle]
*
* @return string The filesize in human readable format
*
* @static
*/
function prefixed(
$size, $decimals = 1, $long = false, $oldStyle = true,
$useBiBytes = true
) {
$base = ($oldStyle || $useBiBytes) ? 1024 : 1000;
$names = array(
'', 'kilo', 'mega', 'giga', 'tera',
'peta', 'exa', 'zetta', 'yotta'
);
$max = count($names) - 1;
for ($a = 0; $size >= $base && $a < $max; $a++) {
$size /= $base;
}
$name = ($oldStyle || !$useBiBytes)
? $names[$a]
: $names[$a] . 'bi';
if (!$long) {
$name = $oldStyle || !$useBiBytes
? strtoupper(substr($name, 0, 1))
: strtoupper(substr($name, 0, 1)) . 'i';
$name .= 'B';
} else {
$name .= $size == 1 ? 'byte' : 'bytes';
}
return round($size, $decimals) . ' ' . $name;
}
}
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