ftp_size

说明

int ftp_size ( resource ftp_stream, string remote_file )

ftp_size() 函数以字节返回远程文件 remote_file 的大小。如果指定文件不存在或发生错误，则返回 -1。有些 FTP 服务器可能不支持此特性。

获取成功返回文件大小，否则返回 -1。

例子 1. ftp_size() 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); $res = ftp_size($conn_id, $file); if ($res != -1) { echo "size of $file is $res bytes"; } else { echo "couldn't get the size"; } ftp_close($conn_id); ?>

参见 ftp_rawlist()。

add a note User Contributed Notes

chuck at t8design dot com
24-May-2006 12:54


note that project_t4 at hotmail dot com's example above doesn't work in general, though it works on his Win2K/Apache server; as far as I can tell there is no way to check over ftp whether a directory exists.  This function's behavior given a directory name seems to be at least somewhat dependent on your OS, web server, or ftp server, I don't know which.

adams[AT]techweavers[DOT]net
22-Jun-2005 05:30


Well this function is nice but if you have files larger then 2.1Gb or 2.1 Billion Bytes you cannot get its size.

29-Sep-2004 09:10


To get a dirsize recursive you can use this simple function:



<?php # copyright by fackelkind | codeMaster

    function getRecDirSize ($connection, $dir){

        $temp = ftp_rawlist ($connection, "-alR $dir");

        foreach ($temp as $file){

            if (ereg ("([-d][rwxst-]+).* ([0-9]) ([a-zA-Z0-9]+).* ([a-zA-Z0-9]+).* ([0-9]*) ([a-zA-Z]+[0-9: ]*[0-9]) ([0-9]{2}:[0-9]{2}) (.+)", $file, $regs)){  

                $isdir = (substr ($regs[1],0,1) == "d");

                if (!$isdir)

                    $size += $regs[5];

            }

        }

        return $size;

    }

    $dirSize = getRecDirSize ($conID, "/");

?>

project_t4 at hotmail dot com
19-Mar-2004 03:03


Just to let people out there know, on my windows 2000 server running Apache and php i was returned 0 not -1 for directories.



foreach ($dir_list as $item)

    {

      if(ftp_size($conn_id, $item) == "0")

      {

      echo "<br>Directory:: ".$item;

      } else {

      echo "<br>File:: ".$item;

      }

    }



This outputs a list of the remote directory and indicates which items are directories and which are files.

nicke_ at at_h9k dot com
04-Oct-2003 09:48


This will return the filesize on remote host and the size if you download it in FTP_BINARY mode. If you are using FTP_ASCII in ftp_get() the size can be changed.

victor59 at yahoo dot com dot hk
23-Dec-2002 05:44


$file= 'filename with space.txt';

$size = ftp_size($this->ftp, urldecode($file) );



this one can correctly return the size

otherwize, it always return -1

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