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  • ftp_mdtm()

    (PHP 4, PHP 5, PHP 7)

    返回指定文件的最后修改时间

    说明

    ftp_mdtm(resource $ftp_stream,string $remote_file): int

    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。

    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。

    Wrapped the above in a function, for easy use:
    function getMtime($filename, $server, $login, $pwd){
      // set up connection
      $conn_id = ftp_connect($server) or die("ERROR:Could not connect to $server");
      // login
      $login_result = ftp_login($conn_id, $login, $pwd);
      // get the last modified time for our file
      $buff = ftp_mdtm($conn_id, $filename);
      // close the connection
      ftp_close($conn_id);
      if ($buff != -1) {
        // somefile.txt was last modified on: March 26 2003 14:16:41.
        return "$filename was last modified on : " . date("F d Y H:i:s.", $buff);
      } else {
        return "ERROR: Could not retrieve mdtime";
      }
    }
    $filename='example.csv';
    $server='ftp.example.nl';
    $login='supersecureloginhere';
    $pwd='supersecurepwd';
    $mtime=getMtime($filename, $server, $login, $pwd);
    echo $mtime;
    Seems to work with directories as well on my Win32 box.
    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";
    $file_modtime = ftp_mdtm($connection, '"'.$file_name.'"')

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