FTP 函数
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ftp_mdtm

(PHP 4, PHP 5)

ftp_mdtm返回指定文件的最后修改时间

说明

int ftp_mdtm ( resource $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。


FTP 函数
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用户评论:

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.'"')

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