blocks|key|1219029|text|对于PHP+5：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1219030|$folder_exists+=+is_dir('ftp://user:password@example.com/some/dir/path');|code-block|syntax|javascript|1219031|http://php.net/manual/en/function.is-dir.php：“从PHP5.0.0开始，这个函数也可以和一些网址包装器一起使用。”|offset|length|1219032|http://php.net/manual/en/wrappers.ftp.php：支持“从PHP5.0.0开始:+filesize()、filetype()、file_exists()、is_file()和is_dir()”|1219033|entityMap|0|LINK|mutability|MUTABLE|url|http://php.net/manual/en/function.is-dir.php|1|http://php.net/manual/en/wrappers.ftp.php^0|0|0|0|18|0|0|0|15|1|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@$I|Z|J|10|1|11]]|A|$]]|$1|K|3|L|5|6|7|12|8|@]|9|@$I|13|J|14|1|15]]|A|$]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]|U|$5|P|Q|R|A|$S|V]]]]

For PHP 5:

<pre><code>$folder_exists = is_dir('ftp://user:password@example.com/some/dir/path');
</code></pre>

<a href="http://php.net/manual/en/function.is-dir.php" rel="noreferrer">http://php.net/manual/en/function.is-dir.php</a> : "As of PHP 5.0.0, this function can also be used with some URL wrappers."

<a href="http://php.net/manual/en/wrappers.ftp.php" rel="noreferrer">http://php.net/manual/en/wrappers.ftp.php</a> : [Support] "As of PHP 5.0.0: filesize(), filetype(), file_exists(), is_file(), and is_dir()"

blocks|key|1433966|text|试试这个：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1433967|if+(ftp_nlist($ftp_stream,+$new_folder)+==+false)+{
++++ftp_mkdir($ftp_stream,+$new_folder);
}|code-block|syntax|javascript|1433968|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Try this:

<pre><code>if (ftp_nlist($ftp_stream, $new_folder) == false) {
 ftp_mkdir($ftp_stream, $new_folder);
}
</code></pre>

blocks|key|1218971|text|在php中没有用于ftp连接的'exists‘函数。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1218972|您可以尝试ftp_chdir并检查结果|offset|length|1218973|entityMap|0|LINK|mutability|MUTABLE|url|http://nl.php.net/manual/en/function.ftp-chdir.php^0|0|5|9|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

There is no 'exists' function for ftp connections in php.

You could try <a href="http://nl.php.net/manual/en/function.ftp-chdir.php" rel="noreferrer" title="ftp_chrdir">ftp_chdir</a> and check the result

blocks|key|1434001|text|适合我的解决方案是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1434002|if+(!in_array($dirName.'/'.$something,+$ftp->nlist($dirName)))+{++
+++//+do+something
}+++++++++++++|code-block|syntax|javascript|1434003|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

The solution that works for me:

<pre><code>if (!in_array($dirName.'/'.$something, $ftp-&gt;nlist($dirName))) { 
 // do something
} 
</code></pre>

blocks|key|1434175|text|我也对任何一个答案都不满意。被接受了。我有标准连接(不是像@Lackeeee的答案中最接近我的那种O-O风格)：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1434176|$ftp+=+ftp_connect($host,+21,+30);
ftp_login($ftp,+$user,+$password);

//+if+$my_dir+name+exists+in+array+returned+by+nlist+in+current+'.'+dir
if+(in_array($my_dir,+ftp_nlist($ftp,+'.')))+{
++++//+do+smth+with+$my_dir
}

ftp_close($ftp);|code-block|syntax|javascript|1434177|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Me also not satisfied with any anwser incl. accepted one. I have standard connection (not O-O-style like in @Lackeeee's answer which is closest to mine):

<pre><code>$ftp = ftp_connect($host, 21, 30);
ftp_login($ftp, $user, $password);

// if $my_dir name exists in array returned by nlist in current '.' dir
if (in_array($my_dir, ftp_nlist($ftp, '.'))) {
 // do smth with $my_dir
}

ftp_close($ftp);
</code></pre>

blocks|key|1219076|text|ftp_mdtm()获取远程文件的上次修改时间。如果成功，它将以Unix时间戳的形式返回上次修改的时间；如果失败，则返回-1。请注意，ftp_mdtm()不适用于目录。所以如果我们得到-1，那么文件可能是目录。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1219077|还要注意，并不是所有的服务器都支持这个特性！|1219078|entityMap|0|LINK|mutability|MUTABLE|url|http://www.php.net/manual/en/function.ftp-mdtm.php^0|0|A|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

<a href="http://www.php.net/manual/en/function.ftp-mdtm.php" rel="nofollow">ftp_mdtm()</a> gets the last modified time for a remote file.
It returns the last modified time as a Unix timestamp on success, or -1 on error. 
Note that ftp_mdtm() does not work with directories. So if we get -1 then maybe the file is directory.

Note also that not all servers support this feature!

blocks|key|1433952|text|为了检查多个文件，最好使用ftp_chdir，而不是使用is_dir+/+ftp函数与网址包装器，因为有相当慢(因为每个文件都必须打开一个新的file_exists连接...)。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1433953|foreach+($list+as+$item)+{
++++$is_dir+=+@ftp_chdir($ftp_handle,+$item);+//produces+warning+if+file...
++++if+($is_dir)+{
++++++++ftp_chdir($ftp_handle,+'..');
++++++++$dirs[]+=+$item;
++++}+else+{
++++++++$files[]+=+$item;
++++}
}|code-block|syntax|javascript|1433954|这个脚本在大约10秒后就准备好了。|1433955|使用is_dir和file_exists的相同脚本需要超过45秒。(每个文件有10次运行)|1433956|entityMap^0|D|9|S|6|1Z|B|0|0|0|2|6|9|B|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]|$9|T|A|U|B|C]|$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|Z|8|@$9|10|A|11|B|C]|$9|12|A|13|B|C]]|D|@]|E|$]]|$1|O|3|-4|5|6|7|14|8|@]|D|@]|E|$]]]|P|$]]

for checking multiple files it is better to use <code>ftp_chdir</code> instead using the <code>is_dir</code> / <code>file_exists</code> function with URL wrappers, cause there are pretty slow (foreach file there must be opened a new ftp connection ...).

<pre><code>foreach ($list as $item) {
 $is_dir = @ftp_chdir($ftp_handle, $item); //produces warning if file...
 if ($is_dir) {
 ftp_chdir($ftp_handle, '..');
 $dirs[] = $item;
 } else {
 $files[] = $item;
 }
}
</code></pre>

This script was ready after ~10 sec.

The same script using <code>is_dir</code> and <code>file_exists</code> needed more than 45 sec. (each file had 10 runs)

blocks|key|1219208|text|在现代的FTP服务器上，您可以使用MLST/MLSD命令来检索有关文件的详细的机器可读信息。要了解有关此命令的更多信息，请阅读RFC第https://www.rfc-editor.org/rfc/rfc3659#page-23页。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1219209|下面是确定文件系统节点类型的示例代码：|1219210|function+isDir($ftp,+$fsNodePath)+{
++++$type+=+strtolower(fsNodeType($ftp,+$fsNodePath));
++++return+($type+===+'cdir'+%7C%7C+$type+===+'pdir'+%7C%7C+$type+===+'dir');

}

function+isFile($ftp,+$fsNodePath)+{
++++$type+=+strtolower(fsNodeType($ftp,+$fsNodePath));
++++return+($type+===+'file');
}

function+isLink($ftp,+$fsNodePath)+{
++++$type+=+strtolower(fsNodeType($ftp,+$fsNodePath));
++++return+(preg_match('/%5EOS\.unix\=(slink%7Csymlink)/i',+$type)+===+1);
}

function+fsNodeType($ftp,+$fsNodePath)
{
++++$lines+=+array_values(ftp_raw($ftp,+"MLST+$fsNodePath"));
++++$linesCount+=+count($lines);
++++if+($linesCount+===+1)+{
++++++++throw+new+Exception('Unsuitable+response+for+MLST+command:+'+.+$lines[0]);
++++}
++++if+($linesCount+!==+3)+{
++++++++$e+=+new+Exception('Unexpected+response+for+MLST+command+(1)');
++++++++$e->response+=+$lines;
++++++++throw+$e;
++++}
++++if+(!preg_match('/%5E250\-/',+$lines[0])+%7C%7C+!preg_match('/%5E250+/',+$lines[2]))+{
++++++++$e+=+new+Exception('Unexpected+response+for+MLST+command+(2)');
++++++++$e->response+=+$lines;
++++++++throw+$e;
++++}
++++$spEntry+=+'+'+.+$lines[1];
++++if+(preg_match('/[\s\;]type\=([%5E\;]%2B)/i',+$spEntry,+$matches))+{
++++++++$type+=+trim($matches[1]);
++++++++return+$type;
++++}+else+{
++++++++throw+new+Exception('Failed+to+extract+filesystem+node+type+from+SP+entry:'+.+$spEntry);
++++}
}

$ftp+=+ftp_connect('192.168.0.100');
ftp_login($ftp,+'user',+'1234');
$is+=+isDir($ftp,+'tmp');
var_dump($is);|code-block|syntax|javascript|1219211|请注意，并非每台服务器都支持MLST命令。例如，ftp.freebsd.org不:(|1219212|entityMap|0|LINK|mutability|MUTABLE|url|https://www.rfc-editor.org/rfc/rfc3659#page-23^0|1V|1A|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|Z|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|6|7|10|8|@]|9|@]|C|$]]|$1|M|3|-4|5|6|7|11|8|@]|9|@]|C|$]]]|N|$O|$5|P|Q|R|C|$S|T]]]]

On modern FTP-servers you can use MLST/MLSD command to retrieve detailed machine-readable information about files. Read RFC page <a href="https://www.rfc-editor.org/rfc/rfc3659#page-23" rel="nofollow noreferrer">https://www.rfc-editor.org/rfc/rfc3659#page-23</a> to learn more about this command.
Here is sample code to determine filesystem node type:
<pre><code>function isDir($ftp, $fsNodePath) {
 $type = strtolower(fsNodeType($ftp, $fsNodePath));
 return ($type === 'cdir' || $type === 'pdir' || $type === 'dir');

}

function isFile($ftp, $fsNodePath) {
 $type = strtolower(fsNodeType($ftp, $fsNodePath));
 return ($type === 'file');
}

function isLink($ftp, $fsNodePath) {
 $type = strtolower(fsNodeType($ftp, $fsNodePath));
 return (preg_match('/^OS\.unix\=(slink|symlink)/i', $type) === 1);
}

function fsNodeType($ftp, $fsNodePath)
{
 $lines = array_values(ftp_raw($ftp, &quot;MLST $fsNodePath&quot;));
 $linesCount = count($lines);
 if ($linesCount === 1) {
 throw new Exception('Unsuitable response for MLST command: ' . $lines[0]);
 }
 if ($linesCount !== 3) {
 $e = new Exception('Unexpected response for MLST command (1)');
 $e-&gt;response = $lines;
 throw $e;
 }
 if (!preg_match('/^250\-/', $lines[0]) || !preg_match('/^250 /', $lines[2])) {
 $e = new Exception('Unexpected response for MLST command (2)');
 $e-&gt;response = $lines;
 throw $e;
 }
 $spEntry = ' ' . $lines[1];
 if (preg_match('/[\s\;]type\=([^\;]+)/i', $spEntry, $matches)) {
 $type = trim($matches[1]);
 return $type;
 } else {
 throw new Exception('Failed to extract filesystem node type from SP entry:' . $spEntry);
 }
}

$ftp = ftp_connect('192.168.0.100');
ftp_login($ftp, 'user', '1234');
$is = isDir($ftp, 'tmp');
var_dump($is);
</code></pre>
Note that not every server supports MLST command. For example, ftp.freebsd.org does not :(

blocks|key|1434217|text|这里有一个函数可以做到这一点。它返回一个简单的true或false。它还可以处理一些边缘情况。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1434218|function+isDir($connection,+$dir)
{
++++$dir+=+trim($dir,+'/');
++++$dir+=+'/'+.+$dir;
++++if+($dir+===+'/')+{
++++++++return+true;
++++}
++++return+in_array($dir,+ftp_nlist($connection,+dirname($dir)));
}|code-block|syntax|javascript|1434219|entityMap^0|N|4|S|5|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]|$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|L|$]]

Here is a function to do this. It returns a simple <code>true</code> or <code>false</code>. It also handles some edge cases.

<pre><code>function isDir($connection, $dir)
{
 $dir = trim($dir, '/');
 $dir = '/' . $dir;
 if ($dir === '/') {
 return true;
 }
 return in_array($dir, ftp_nlist($connection, dirname($dir)));
}
</code></pre>

blocks|key|1434274|text|ftp_nlist已经在某种程度上做到了：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1434275|function+ftp_is_dir($path)+{
++global+$ftp_conn;
++$list+=+ftp_nlist($ftp_conn,+$path);
++if+($list+&&+count($list)>1)+return+true;
++else+return+false;
}|code-block|syntax|javascript|1434276|当一个有效的文件(而不是文件夹)被指定为$path时，ftp_nlist会返回一个包含一个元素的数组，而即使是一个空文件夹也会返回两个元素。|1434277|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

ftp_nlist already kinda does it: 

<pre><code>function ftp_is_dir($path) {
 global $ftp_conn;
 $list = ftp_nlist($ftp_conn, $path);
 if ($list &amp;&amp; count($list)&gt;1) return true;
 else return false;
}
</code></pre>

ftp_nlist returns an array of one element when a valid file (not folder) is given as $path, whereas, even an empty folder will yield 2 elements.

Is there a way to check if a a folder exists on the server using PHP Ftp functionality?

How to check using PHP FTP functionality if folder exists on server or not?

文件系统

服务器

Unix

有没有办法使用PHP Ftp功能检查服务器上是否存在文件夹？

问如何使用PHP FTP功能检查服务器上是否存在文件夹？
EN

回答 10

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何使用PHP FTP功能检查服务器上是否存在文件夹？EN

回答 10

Stack Overflow用户

Stack Overflow用户

Stack Overflow用户

社区

活动

资源

关于

腾讯云开发者

热门产品

热门推荐

更多推荐

问如何使用PHP FTP功能检查服务器上是否存在文件夹？
EN