【www.9778.com】PHP的FTP学习(二)[转自奥索]

  

*/

// function to connect to FTP server
function connect()
{
global $server, $username, $password;
$conn = ftp_connect($server);
ftp_login($conn, $username, $password);
return $conn;
}

// main program begins

// check for valid form entries else print error
if (!$server || !$username || !$password)
{
echo “Form data incomplete!”;
}
else
{

// connect
$result = connect();

// action: change directory
if ($action == “CWD”)
{

// at initial stage $rdir does not exist
// so assume default directory
if (!$rdir)
{
$path = “.”;
}
// get current location $cdir and add it to requested directory $rdir
else
{
$path = $cdir . “/” . $rdir;
}

// change to requested directory
ftp_chdir($result, $path);

}

// action: delete file(s)
else if ($action == “Delete”)
{

ftp_chdir($result, $cdir);

// loop through selected files and delete
for ($x=0; $x<sizeof($dfile); $x++)
{
ftp_delete($result, $cdir . “/” . $dfile[$x]);
}

}
// action: download files
else if ($action == “Download”)
{

ftp_chdir($result, $cdir);

// download selected files
// IMPORTANT: you should specify a different download location here!!
for ($x=0; $x<sizeof($dfile); $x++)
{
ftp_get($result, $dfile[$x], $dfile[$x], FTP_BINARY);
}

}
// action: upload file
else if ($action == “Upload”)
{

ftp_chdir($result, $cdir);

// put file

/*
a better idea would be to use
$res_code = ftp_put($result,
$HTTP_POST_FILES[“upfile”][“name”],
$HTTP_POST_FILES[“upfile”][“tmp_name”], FTP_BINARY);
as it offers greater security
*/
$res_code = ftp_put($result, $upfile_name, $upfile, FTP_BINARY);

// check status and display
if ($res_code == 1)
{
$status = “Upload successful!”;
}
else
{
$status = “Upload error!”;
}

}

// create file list
$filelist = ftp_nlist($result, “.”);

// and display interface
include(“include.php”);

// close connection
ftp_quit($result);

}
?>

</body>
</html>

现在终于到了我们的第三个文件,include.php
它为程序建立起一个用户界面。”include.php”
包含三个表单,一些PHP代码获取当前的目录列表并将它们存入三个变量$files
(包括当前目录下的文件),$file_sizes (相应的文件大小),and $dirs
(包含子目录名)第一个表单使用$dirs
产生一个下拉式目录列表,对应于“action=CWD”。第二个表单使用$files$file_sizes创建一个可用的文件列表,每一个文件使用一个checkbox。这个表单的action对应于”action=Delete”
and
“action=Download”第三个表单用来上传一个文件到FTP站点,如下:——————————————————————————–form
enctype=”multipart/form-data” action=actions.php4 method=post…input
type=file
name=upfile…/form——————————————————————————–当PHP以这种方式接收到一个文件名,一些变量就产生了,这些变量指定文件的大小,一个临时的文件名以及文件的类型,最初的文件名存在$upfile_name,一旦上传后文件名便存入$upfile中通过这些信息,我们就可以创建以下的语句了:——————————————————————————–ftp_put($result,
$upfile_name, $upfile,
FTP_BINARY);——————————————————————————–以下是代码列表:——————————————————————————–!–
code for index.html begins here –htmlheadbasefont
face=arial/headbodytable border=0 align=centerform action=”actions.php”
method=postinput type=hidden name=action value=CWDtrtdServer/tdtdinput
type=text name=server/td/trtrtdUser/tdtdinput type=text
name=username/td/trtrtdPassword/tdtdinput type=password
name=password/td/trtrtd colspan=2 align=centerinput type=”submit”
value=”Beam Me Up, Scotty!”/td/tr/form/table/body/html!– code for
index.html ends here
——————————————————————————————————————————————————————!–
code for actions.php begins here –htmlheadbasefont
face=Arial/headbody?/*——————————————————————————–DISCLAIMER:This
is use-at-your-own-risk code.It is meant only for illustrative purposes
and is not meant for production environments. No warranties of any kind
are provided to the user.You have been warned!All code copyright
Melonfire, 2000. Visit us at */// function to connect to FTP
serverfunction connect(){global $server, $username, $password;$conn =
ftp_connect($server);ftp_login($conn, $username, $password);return
$conn;}// main program begins// check for valid form entries else print
errorif (!$server !$username !$password){echo “Form data
incomplete!”;}else{// connect$result = connect();// action: change
directoryif ($action == “CWD”){// at initial stage $rdir does not
exist// so assume default directoryif (!$rdir){$path = “.”;}// get
current location $cdir and add it to requested directory $rdirelse{$path
= $cdir . “/” . $rdir;}// change to requested
directoryftp_chdir($result, $path);}// action: delete file(s)else if
($action == “Delete”){ftp_chdir($result, $cdir);// loop through
selected files and deletefor ($x=0; $xsizeof($dfile);
$x++){ftp_delete($result, $cdir . “/” . $dfile[$x]);}}// action:
download fileselse if ($action == “Download”){ftp_chdir($result,
$cdir);// download selected files// IMPORTANT: you should specify a
different download location here!!for ($x=0; $xsizeof($dfile);
$x++){ftp_get($result, $dfile[$x], $dfile[$x], FTP_BINARY);}}//
action: upload fileelse if ($action == “Upload”){ftp_chdir($result,
$cdir);// put file/*a better idea would be to use$res_code =
ftp_put($result,
$HTTP_POST_FILES[“upfile”][“name”],$HTTP_POST_FILES[“upfile”][“tmp_name”],
FTP_BINARY);as it offers greater security*/$res_code =
ftp_put($result, $upfile_name, $upfile, FTP_BINARY);// check status
and displayif ($res_code == 1){$status = “Upload
successful!”;}else{$status = “Upload error!”;}}// create file
list$filelist = ftp_nlist($result, “.”);// and display
interfaceinclude(“include.php”);// close
connectionftp_quit($result);}?/body/html!– code for actions.php ends
here
——————————————————————————————————————————————————————!–
code for include.php begins here –?// get current location$here =
ftp_pwd($result);/*since ftp_size() is quite slow, especially when
workingon an array containing all the files in a directory,this section
performs an ftp_size() on all the files in the currentdirectory and
creates three arrays.*/// array for files$files = Array();// array for
directories$dirs = Array();// array for file sizes$file_sizes =
Array();// counters$file_list_counter = 0;$dir_list_counter = 0;//
check each element of $filelistfor ($x=0; $xsizeof($filelist); $x++){if
(ftp_size($result, $filelist[$x]) != -1){// create
arrays$files[$file_list_counter] =
$filelist[$x];$file_sizes[$file_list_counter] =
ftp_size($result,
$filelist[$x]);$file_list_counter++;}else{$dir_list[$dir_list_counter]
= $filelist[$x];$dir_list_counter++;}}?!– header – where am I?
–centerYou are currently working in b? echo $here; ?/bbr!– status
message for upload function –? echo $status; ?/centerhrp!– directory
listing in drop-down list –Available directories:form
action=actions.php method=post!– these values are passed hidden every
time –!– a more optimal solution might be to place these in
sessionvariables –input type=hidden name=username value=? echo
$username; ?input type=hidden name=password value=? echo $password;
?input type=hidden name=server value=? echo $server; ?input type=hidden
name=cdir value=? echo $here; ?!– action to take when THIS form is
submitted –input type=hidden name=action value=CWD!– dir listing
begins; first item is for parent dir –select name=rdiroption
value=”..”parent directory/option?for ($x=0; $xsizeof($dir_list);
$x++){echo “option value=” . $dir_list[$x] . “” . $dir_list[$x] .
“/option”;}?/selectinput type=submit value=Go/formhr!– file listing
begins –Available files:form action=actions.php method=post!– these
values are passed hidden every time –input type=hidden name=server
value=? echo $server; ?input type=hidden name=username value=? echo
$username; ?input type=hidden name=password value=? echo $password;
?input type=hidden name=cdir value=? echo $here; ?table border=0
width=100%?// display file listing with checkboxes and sizesfor ($y=0;
$ysizeof($files); $y++){echo “trtdinput type=checkbox name=dfile[]
value=” . $files[$y] .””. $files[$y] . ” i(” . $file_sizes[$y] .
” bytes)/itd”;}?/table!– actions for this form –centerinput
type=submit name=action value=Deleteinput type=submit name=action
value=Download/center/formphr!– file upload form –File upload:form
enctype=”multipart/form-data” action=actions.php method=post!– these
values are passed hidden every time –input type=hidden name=username
value=? echo $username; ?input type=hidden name=password value=? echo
$password; ?input type=hidden name=server value=? echo $server; ?input
type=hidden name=cdir value=? echo $here; ?tabletrtd!– file selection
box –input type=file name=upfile/td/trtrtd!– action for this form
–input type=submit name=action value=Upload/td/tr/table/form!– code
for include.php ends here —

<!– code for index.html ends here –>


<!– code for actions.php begins here –>

<html>
<head>
<basefont face=Arial>
</head>
<body>

<?

/*

DISCLAIMER:

This is use-at-your-own-risk code.

It is meant only for illustrative purposes and is not meant for
production environments. No warranties of any kind are provided to the
user.

You have been warned!

All code copyright Melonfire, 2000. Visit us at

以下是代码列表:

<!– code for index.html begins here –>
<html>
<head>
<basefont face=arial>
</head>

<body>

<table border=0 align=center>
<form action=”actions.php” method=post>
<input type=hidden name=action value=CWD>
<tr>
<td>
Server
</td>
<td>
<input type=text name=server>
</td>
</tr>

<tr>
<td>
User
</td>
<td>
<input type=text name=username>
</td>
</tr>

<tr>
<td>
Password
</td>
<td>
<input type=password name=password>
</td>
</tr>

<tr>
<td colspan=2 align=center>
<input type=”submit” value=”Beam Me Up, Scotty!”>
</td>
</tr>

</form>
</table>

</body>
</html>

<!– code for actions.php ends here –>


<!– code for include.php begins here –>

<?

// get current location
$here = ftp_pwd($result);

/*
since ftp_size() is quite slow, especially when working
on an array containing all the files in a directory,
this section performs an ftp_size() on all the files in the current
directory and creates three arrays.
*/

// array for files
$files = Array();

// array for directories
$dirs = Array();

// array for file sizes
$file_sizes = Array();

// counters
$file_list_counter = 0;
$dir_list_counter = 0;

// check each element of $filelist
for ($x=0; $x<sizeof($filelist); $x++)
{
if (ftp_size($result, $filelist[$x]) != -1)
{
// create arrays
$files[$file_list_counter] = $filelist[$x];
$file_sizes[$file_list_counter] = ftp_size($result,
$filelist[$x]);
$file_list_counter++;
}
else
{
$dir_list[$dir_list_counter] = $filelist[$x];
$dir_list_counter++;
}
}

?>

<!– header – where am I? –>
<center>
You are currently working in <b><? echo $here;
?></b>
<br>
<!– status message for upload function –>
<? echo $status; ?>
</center>
<hr>
<p>
<!– directory listing in drop-down list –>
Available directories:
<form action=actions.php method=post>

<!– these values are passed hidden every time –>
<!– a more optimal solution might be to place these in session
variables –>
<input type=hidden name=username value=<? echo $username;
?>>
<input type=hidden name=password value=<? echo $password;
?>>
<input type=hidden name=server value=<? echo $server; ?>>
<input type=hidden name=cdir value=<? echo $here; ?>>

<!– action to take when THIS form is submitted –>
<input type=hidden name=action value=CWD>

<!– dir listing begins; first item is for parent dir –>
<select name=rdir>
<option value=”..”><parent directory></option>

<?

for ($x=0; $x<sizeof($dir_list); $x++)
{
echo “<option value=” . $dir_list[$x] . “>” . $dir_list[$x]
. “</option>”;

}
?>

</select>
<input type=submit value=Go>
</form>

<hr>

<!– file listing begins –>

Available files:
<form action=actions.php method=post>

<!– these values are passed hidden every time –>
<input type=hidden name=server value=<? echo $server; ?>>
<input type=hidden name=username value=<? echo $username;
?>>
<input type=hidden name=password value=<? echo $password;
?>>
<input type=hidden name=cdir value=<? echo $here; ?>>

<table border=0 width=100%>

<?

// display file listing with checkboxes and sizes
for ($y=0; $y<sizeof($files); $y++)
{
echo “<tr><td><input type=checkbox name=dfile[] value=”
. $files[$y] .
“>”. $files[$y] . ” <i>(” . $file_sizes[$y] . ”
bytes)</i><td>”;
}

?>
</table>

<!– actions for this form –>
<center>
<input type=submit name=action value=Delete>   
<input type=submit name=action value=Download>
</center>
</form>
<p>

<hr>

<!– file upload form –>
File upload:
<form enctype=”multipart/form-data” action=actions.php
method=post>

<!– these values are passed hidden every time –>
<input type=hidden name=username value=<? echo $username;
?>>
<input type=hidden name=password value=<? echo $password;
?>>
<input type=hidden name=server value=<? echo $server; ?>>
<input type=hidden name=cdir value=<? echo $here; ?>>

<table>
<tr>
<td>
<!– file selection box –>
<input type=file name=upfile>
</td>
</tr>
<tr>
<td>
<!– action for this form –>
<input type=submit name=action value=Upload>
</td>
</tr>
</table>
</form>

<!– code for include.php ends here –>

By Vikram Vaswani
Melonfire
November 07, 2000