/**
* Join a split file into a whole file. Does the reverse of [File::split].
*
* $count = File::join($file);
*
* @param string split filename, without .000 extension
* @param string output filename, if different then an the filename
* @param string $storage 物理存储组，不传则为默认
* @return integer The number of pieces that were joined.
*/
public static function join($filename, $storage = 'default')
{
$info = File::check_and_get_path($filename);
if (File::can_do_run($storage)) {
// Open the file
$file = fopen($filename, 'wb+');
// Read files in 8k blocks
$block_size = 1024 * 8;
// Total number of peices
$pieces = 0;
while (is_file($piece = $filename . '.' . str_pad($pieces + 1, 3, '0', STR_PAD_LEFT))) {
// Read another piece
$pieces += 1;
// Open the piece for reading
$piece = fopen($piece, 'rb');
while (!feof($piece)) {
// Transfer the data in blocks
fwrite($file, fread($piece, $block_size));
}
// Close the peice
fclose($piece);
}
return $pieces;
} else {
return File::call_http_host($storage, 'file/join', $info[0], $info[1]);
}
}
