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<?php
/**
* Lightweight abstraction layer for common simple server based routines
*
* Standard: PSR-2
* @link http://www.php-fig.org/psr/psr-2 Full Documentation
*
* @package SC\DUPX\Server
*
*/
class DUPX_Server
{
/**
* Returns true if safe mode is enabled
*/
public static $php_safe_mode_on = false;
/**
* The servers current PHP version
*/
public static $php_version = 0;
/**
* The minimum PHP version the installer will support
*/
public static $php_version_min = "5.2.7";
/**
* Is the current servers version of PHP safe to use with the installer
*/
public static $php_version_safe = false;
/**
* Is PHP 5.3 or better running
*/
public static $php_version_53_plus;
/**
* Used to init the static properties
*/
public static function init()
{
self::$php_safe_mode_on = in_array(strtolower(@ini_get('safe_mode')), array('on', 'yes', 'true', 1, "1"));
self::$php_version = phpversion();
self::$php_version_safe = DUPX_U::isVersion(self::$php_version_min);
self::$php_version_53_plus = DUPX_U::isVersion('5.3.0');
}
/**
* Is the directory provided writable by PHP
*
* @param string $path A physical directory path
*
* @return bool Returns true if PHP can write to the path provided
*/
public static function isDirWritable($path)
{
if (!@is_writeable($path)) return false;
if (is_dir($path)) {
if ($dh = @opendir($path)) {
closedir($dh);
} else {
return false;
}
}
return true;
}
/**
* Can this server process in shell_exec mode
*
* @return bool Returns true is the server can run shell_exec commands
*/
public static function hasShellExec()
{
if (array_intersect(array('shell_exec', 'escapeshellarg', 'escapeshellcmd', 'extension_loaded'), array_map('trim', explode(',', @ini_get('disable_functions'))))) return false;
//Suhosin: http://www.hardened-php.net/suhosin/
//Will cause PHP to silently fail.
if (extension_loaded('suhosin')) return false;
// Can we issue a simple echo command?
if (!@shell_exec('echo duplicator')) return false;
return true;
}
/**
* Returns the path where the zip command can be called on this server
*
* @return string The path to where the zip command can be processed
*/
public static function getUnzipPath()
{
$filepath = null;
if (self::hasShellExec()) {
if (shell_exec('hash unzip 2>&1') == NULL) {
$filepath = 'unzip';
} else {
$try_paths = array(
'/usr/bin/unzip',
'/opt/local/bin/unzip');
foreach ($try_paths as $path) {
if (file_exists($path)) {
$filepath = $path;
break;
}
}
}
}
return $filepath;
}
/**
* A safe method used to copy larger files
*
* @param string $source The path to the file being copied
* @param string $destination The path to the file being made
*
* @return bool True if the file was copied
*/
public static function copyFile($source, $destination)
{
try {
$sp = fopen($source, 'r');
$op = fopen($destination, 'w');
while (!feof($sp)) {
$buffer = fread($sp, 512); // use a buffer of 512 bytes
fwrite($op, $buffer);
}
// close handles
fclose($op);
fclose($sp);
return true;
} catch (Exception $ex) {
return false;
}
}
/**
* Returns an array of zip files found in the current executing directory
*
* @return array of zip files
*/
public static function getZipFiles()
{
$files = array();
foreach (glob("*.zip") as $name) {
if (file_exists($name)) {
$files[] = $name;
}
}
if (count($files) > 0) {
return $files;
}
//FALL BACK: Windows XP has bug with glob,
//add secondary check for PHP lameness
if ($dh = opendir('.')) {
while (false !== ($name = readdir($dh))) {
$ext = substr($name, strrpos($name, '.') + 1);
if (in_array($ext, array("zip"))) {
$files[] = $name;
}
}
closedir($dh);
}
return $files;
}
}
//INIT Class Properties
DUPX_Server::init();
?>
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