/**
* Class constructor - initializes internal operating parameters
*/
public function __construct()
{
AEUtilLogger::WriteLog(_AE_LOG_DEBUG, "AEArchiverZipnative :: New instance");
if (!class_exists('ZipArchive')) {
$this->setError('Your server does not support the ZipArchive extension. Please use a different Archiver Engine and retry backing up your site');
}
parent::__construct();
}
/**
* Class constructor - initializes internal operating parameters
*/
public function __construct()
{
AEUtilLogger::WriteLog(_AE_LOG_DEBUG, "AEArchiverZip :: New instance");
// Get chunk override
$registry = AEFactory::getConfiguration();
if ($registry->get('engine.archiver.common.chunk_size', 0) > 0) {
$this->AkeebaPackerZIP_CHUNK_SIZE = AKEEBA_CHUNK;
} else {
// Try to use as much memory as it's possible for CRC32 calculation
$memLimit = ini_get("memory_limit");
if (strstr($memLimit, 'M')) {
$memLimit = (int) $memLimit * 1048576;
} elseif (strstr($memLimit, 'K')) {
$memLimit = (int) $memLimit * 1024;
} elseif (strstr($memLimit, 'G')) {
$memLimit = (int) $memLimit * 1073741824;
} else {
$memLimit = (int) $memLimit;
}
if (is_numeric($memLimit) && $memLimit < 0) {
$memLimit = "";
}
// 1.2a3 -- Rare case with memory_limit < 0, e.g. -1Mb!
if ($memLimit == "") {
// No memory limit, use 2Mb chunks (fairly large, right?)
$this->AkeebaPackerZIP_CHUNK_SIZE = 2097152;
} elseif (function_exists("memory_get_usage")) {
// PHP can report memory usage, see if there's enough available memory; Joomla! alone eats about 5-6Mb! This code is called on files <= 1Mb
$memLimit = $this->_return_bytes($memLimit);
$availableRAM = $memLimit - memory_get_usage();
if ($availableRAM <= 0) {
// Some PHP implemenations also return the size of the httpd footprint!
if ($memLimit - 6291456 > 0) {
$this->AkeebaPackerZIP_CHUNK_SIZE = $memLimit - 6291456;
} else {
$this->AkeebaPackerZIP_CHUNK_SIZE = 2097152;
}
} else {
$this->AkeebaPackerZIP_CHUNK_SIZE = $availableRAM * 0.5;
}
} else {
// PHP can't report memory usage, use a conservative 512Kb
$this->AkeebaPackerZIP_CHUNK_SIZE = 524288;
}
}
// NEW 2.3: Should we enable Split ZIP feature?
$fragmentsize = $registry->get('engine.archiver.common.part_size', 0);
if ($fragmentsize >= 65536) {
// If the fragment size is AT LEAST 64Kb, enable Split ZIP
$this->_useSplitZIP = true;
$this->_fragmentSize = $fragmentsize;
// Indicate that we have at least 1 part
$statistics = AEFactory::getStatistics();
$statistics->updateMultipart(1);
}
// NEW 2.3: Should I use Symlink Target Storage?
$dereferencesymlinks = $registry->get('engine.archiver.common.dereference_symlinks', true);
if (!$dereferencesymlinks) {
// We are told not to dereference symlinks. Are we on Windows?
if (function_exists('php_uname')) {
$isWindows = stristr(php_uname(), 'windows');
} else {
$isWindows = DIRECTORY_SEPARATOR == '\\';
}
// If we are not on Windows, enable symlink target storage
$this->_symlink_store_target = !$isWindows;
}
AEUtilLogger::WriteLog(_AE_LOG_DEBUG, "Chunk size for CRC is now " . $this->AkeebaPackerZIP_CHUNK_SIZE . " bytes");
parent::__construct();
}
