{3} [0-9 ]{2} [0-9 ][0-9]:[0-9][0-9]—修改时间（您可以对这个模式进行一些简化，因为所有的文件都在 6 月份进行的修改，所以您可以确切地指定月份的名称。）

[0-9]:[0-9][0-9] -- modification time (You could simplify this a bit, since all of the files were all modified in June, and you could make it more exact by specifying the month names.)

youdao

{3}[0 - 9]{2}[0 - 9][0 - 9]：[0 - 9][0 - 9]—修改时间(您可以对这个模式进行一些简化，因为所有的文件都在6月份进行的修改，所以您可以确切地指定月份的名称。)

[0-9] [0-9] : [0-9] [0-9] — modification time (you could simplify this a bit, since all of the files were all modified in June, and you could make it more exact by specifying the month names.)

youdao

函数的作用是：返回指定文件的最后修改时间。

The ftp_mdtm() function returns when the specified file was last modified.

youdao