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# ftp_mdtm

(PHP 3>= 3.0.13, PHP 4 , PHP 5)

ftp_mdtm -- Returns the last modified time of the given file

## Description

int ftp_mdtm ( resource ftp_stream, string remote_file)

ftp_mdtm() checks the last modified time for a file, and returns it as a Unix timestamp. If an error occurs, or the file does not exist, -1 is returned.

Returns a Unix timestamp on success, or -1 on error.

示範 1.ftp_mdtm() example
`<?php $file = 'somefile.txt'; // set up basic connection $conn_id = ftp_connect($ftp_server); // login with username and password $login_result = ftp_login($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); ?>`

> 備注: Not all servers support this feature!

> 備注: ftp_mdtm() does not work with directories.

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