function extract($path)
{
self::$dir = $path;
@mkdir(self::$dir);
self::$datasec = array();
// File information
$mtime = filemtime(self::$zip);
$size = filesize(self::$zip);
// Read file
$fh = fopen(self::$zip, "rb");
$filedata = fread($fh, $size);
fclose($fh);
// Break into sections
$filesecta = explode("PK", $filedata);
// ZIP Comment
$unpackeda = unpack('x16/v1length', $filesecta[1]);
// Cut entries from the central directory
$filesecta = explode("PK", $filedata);
$filesecta = explode("PK", $filesecta[0]);
array_shift($filesecta);
// Removes empty entry/signature
foreach ($filesecta as $filedata) {
// CRC:crc, FD:file date, FT: file time, CM: compression method, GPF: general purpose flag, VN: version needed, CS: compressed size, UCS: uncompressed size, FNL: filename length
$entrya = array();
$entrya['error'] = "";
$unpackeda = unpack("v1version/v1general_purpose/v1compress_method/v1file_time/v1file_date/V1crc/V1size_compressed/V1size_uncompressed/v1filename_length", $filedata);
// Check for encryption
$isencrypted = $unpackeda['general_purpose'] & 0x1 ? true : false;
// Check for value block after compressed data
if ($unpackeda['general_purpose'] & 0x8) {
$unpackeda2 = unpack("V1crc/V1size_compressed/V1size_uncompressed", substr($filedata, -12));
$unpackeda['crc'] = $unpackeda2['crc'];
$unpackeda['size_compressed'] = $unpackeda2['size_uncompressed'];
$unpackeda['size_uncompressed'] = $unpackeda2['size_uncompressed'];
unset($unpackeda2);
}
$entrya['name'] = substr($filedata, 26, $unpackeda['filename_length']);
if (substr($entrya['name'], -1) == "/") {
continue;
}
if (!is_file($entrya['name'])) {
@mkdir(self::$dir . dirname($entrya['name']));
}
$entrya['dir'] = dirname($entrya['name']);
$entrya['dir'] = $entrya['dir'] == "." ? "" : $entrya['dir'];
$entrya['name'] = basename($entrya['name']);
$filedata = substr($filedata, 26 + $unpackeda['filename_length']);
if (strlen($filedata) != $unpackeda['size_compressed']) {
$entrya['error'] = "Compressed size is not equal to the value given in header.";
}
if ($isencrypted) {
$entrya['error'] = "Encryption is not supported.";
} else {
switch ($unpackeda['compress_method']) {
case 0:
// Stored
// Not compressed, continue
break;
case 8:
// Deflated
$filedata = gzinflate($filedata);
break;
case 12:
// BZIP2
if (!extension_loaded("bz2")) {
@dl(strtolower(substr(PHP_OS, 0, 3)) == "win" ? "php_bz2.dll" : "bz2.so");
}
if (extension_loaded("bz2")) {
$filedata = bzdecompress($filedata);
} else {
$entrya['error'] = "Required BZIP2 Extension not available.";
}
break;
default:
$entrya['error'] = "Compression method ({$unpackeda['compress_method']}) not supported.";
}
if (!$entrya['error']) {
if ($filedata === false) {
$entrya['error'] = true;
//"Decompression failed.";
} elseif (strlen($filedata) != $unpackeda['size_uncompressed']) {
$entrya['error'] = "File size is not equal to the value given in header.";
} elseif (crc32($filedata) != $unpackeda['crc']) {
$entrya['error'] = "CRC32 checksum is not equal to the value given in header.";
}
}
$entrya['filemtime'] = mktime(($unpackeda['file_time'] & 0xf800) >> 11, ($unpackeda['file_time'] & 0x7e0) >> 5, ($unpackeda['file_time'] & 0x1f) << 1, ($unpackeda['file_date'] & 0x1e0) >> 5, $unpackeda['file_date'] & 0x1f, (($unpackeda['file_date'] & 0xfe00) >> 9) + 1980);
$entrya['data'] = $filedata;
}
$files[] = $entrya;
}
//PrintR($files);
//exit;
foreach ($files as $v) {
if ($v['error'] === true) {
continue;
}
if ($v['dir']) {
self::createDir($v['dir']);
$file = self::$dir . $v['dir'] . '/' . $v['name'];
} else {
$file = self::$dir . $v['name'];
}
$fp = fopen($file, "w");
fwrite($fp, $v['data']);
fclose($fp);
}
self::$datasec = array();
self::$ctrl_dir = array();
self::$zip = '';
self::$dir = '';
}
