(PHP 4, PHP 5)
ftp_mdtm — 返回指定文件的最后修改时间
$ftp_stream
, string $remote_file
)ftp_mdtm() 检查指定文件的最后修改时间，并以 UNIX 时间戳的方式返回。如果发生错误，或文件不存在则返回 -1。
Example #1 ftp_mdtm() 例子
<?php
$file = 'somefile.txt';
// connect to the server
$conn_id = ftp_connect($ftp_server);
$login_result = ftp_login($conn_id, $ftp_user_name, $ftp_user_pass);
// get the last modified time
$buff = ftp_mdtm($conn_id, $file);
if ($buff != -1) {
// somefile.txt was last modified on: March 26 2003 14:16:41.
echo "$file was last modified on : " . date ("F d Y H:i:s.", $buff);
} else {
echo "Couldn't get mdtime";
}
// close the connection
ftp_close($conn_id);
?>
如果成功返回一个 UNIX 时间戳，否则返回 -1。
Note:
某些 FTP 服务器可能会不支持这个特性。
Note:
ftp_mdtm() 函数不适用于检查目录。
jason dot abz at gmail dot com (2013-05-01 20:53:38)
Be wary that the function appears to return a GMT +0 timestamp.
I still don't understand the reasoning, but here is a bug reported about it:
https://bugs.php.net/bug.php?id=33362
It was considered not a bug, because it was the correct time? Yet it wasn't...
All I know is that the timestamp return to me is missing thousands of seconds, because it's 4 hours behind, even though the timezone and time are the same between host and client.
Jaytop (2005-06-12 12:51:50)
Seems to work with directories as well on my Win32 box.
wseibert at hxcorp dot com (2004-11-04 12:55:27)
When trying to get the modified time of a file that has spaces in it, ftp_mdtm will fail on some FTP servers. If this happens, surround the file name with quotes.
$file_name = "my index.html";
$file_modtime = ftp_mdtm($connection, '"'.$file_name.'"')