<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Functions for listing directories
*
* @package PhpMyAdmin
*/
if (! defined('PHPMYADMIN')) {
exit;
}

/**
* Returns array of filtered file names
*
* @param string $dir directory to list
* @param string $expression regular expression to match files
*
* @return array sorted file list on success, false on failure
*/
function PMA_getDirContent($dir, $expression = '')
{
if (file_exists($dir) && $handle = @opendir($dir)) {
$result = array();
if (substr($dir, -1) != '/') {
$dir .= '/';
}
while ($file = @readdir($handle)) {
// for PHP < 5.2.4, is_file() gives a warning when using open_basedir
// and verifying '..' or '.'
if ('.' != $file
&& '..' != $file
&& is_file($dir . $file)
&& ($expression == '' || preg_match($expression, $file))
) {
$result[] = $file;
}
}
@closedir($handle);
asort($result);
return $result;
} else {
return false;
}
}

/**
* Returns options of filtered file names
*
* @param string $dir directory to list
* @param string $extensions regullar expression to match files
* @param string $active currently active choice
*
* @return array sorted file list on success, false on failure
*/
function PMA_getFileSelectOptions($dir, $extensions = '', $active = '')
{
$list = PMA_getDirContent($dir, $extensions);
if ($list === false) {
return false;
}
$result = '';
foreach ($list as $val) {
$result .= '<option value="'. htmlspecialchars($val) . '"';
if ($val == $active) {
$result .= ' selected="selected"';
}
$result .= '>' . htmlspecialchars($val) . '</option>' . "\n";
}
return $result;
}

/**
* Get currently supported decompressions.
*
* @return string | separated list of extensions usable in PMA_getDirContent
*/
function PMA_supportedDecompressions()
{
global $cfg;

$compressions = '';

if ($cfg['GZipDump'] && @function_exists('gzopen')) {
if (!empty($compressions)) {
$compressions .= '|';
}
$compressions .= 'gz';
}
if ($cfg['BZipDump'] && @function_exists('bzopen')) {
if (!empty($compressions)) {
$compressions .= '|';
}
$compressions .= 'bz2';
}
if ($cfg['ZipDump'] && @function_exists('gzinflate')) {
if (!empty($compressions)) {
$compressions .= '|';
}
$compressions .= 'zip';
}

return $compressions;
}