phpseclib 的 sftp put 命令是同步的吗？

Question

I'm doing a put , then removing the file, ie我正在做一个put ，然后删除文件，即

$sftp->put($filename_dest, $filename, NET_SFTP_LOCAL_FILE);
unlink($filename);

Is this safe, or is put asynchronous?这是安全的，或者是put异步？

Answer 1

It's synchronous.它是同步的。 Under the hood it basically just does a while loop在引擎盖下它基本上只是做一个 while 循环

$size is defined as the size of the local file: $size定义为本地文件的大小：

$sent starts off at 0 and is incremented by the size of the data that's being sent over during each loop. $sent从 0 开始，并根据每次循环期间发送的数据大小递增。

Eventually, the amount of sent data will meet (or exceed) the size of the file and the whole loop will break.最终，发送的数据量将达到（或超过）文件的大小，整个循环将中断。