ftp_get
ftp_get() загружает удалённый файл с FTP-сервера и сохраняет его локально.
Список параметров
Путь к локальному файлу (файл будет перезаписан, если уже существует).
Режим передачи. Должен быть либо FTP_ASCII , либо FTP_BINARY .
Позиция начала загрузки в удалённом файле.
Возвращаемые значения
Возвращает true в случае успешного выполнения или false в случае возникновения ошибки.
Список изменений
| Версия | Описание |
|---|---|
| 8.1.0 | Параметр ftp теперь ожидает экземпляр FTP\Connection ; ранее ожидался ресурс (resource). |
| 7.3.0 | Теперь параметр mode опционален. Раньше он был обязательным. |
Примеры
Пример #1 Пример использования ftp_get()
// объявление переменных
$local_file = ‘local.zip’ ;
$server_file = ‘server.zip’ ;
// установка соединения
$conn_id = ftp_connect ( $ftp_server );
// вход с именем пользователя и паролем
$login_result = ftp_login ( $conn_id , $ftp_user_name , $ftp_user_pass );
// попытка скачать $server_file и сохранить в $local_file
if ( ftp_get ( $conn_id , $local_file , $server_file , FTP_BINARY )) echo «Произведена запись в $local_file \n» ;
> else echo «Не удалось завершить операцию\n» ;
>
// закрытие соединения
ftp_close ( $conn_id );
Смотрите также
- ftp_pasv() — Включает или выключает пассивный режим
- ftp_fget() — Скачивает файл с FTP-сервера и сохраняет его в предварительно открытом файле
- ftp_nb_get() — Скачивает файл с FTP-сервера в асинхронном режиме и сохраняет его в локальный файл
- ftp_nb_fget() — Скачивает файл с FTP-сервера в асинхронном режиме и сохраняет его в предварительно открытом файле
User Contributed Notes 18 notes
I tried to ftp a 7mb file today off my webserver.
I copied this example directly and it told me.
Port command successful
«there was a problem»
I thought it was because of the size.
But I guessed it might be cause of my firewall.
So I made the ftp connection passive:
.
$login_result = ftp_login ( $conn_id , $ftp_user_name , $ftp_user_pass );
ftp_pasv ( $conn_id , true );
?>
Ran the script again & it worked fine.
Don’t want to use an intermediate file? Use ‘php://output’ as the filename and then capture the output using output buffering.
ob_start();
$result = ftp_get($ftp, «php://output», $file, FTP_BINARY);
$data = ob_get_contents();
ob_end_clean();
Don’t forget to check $result to make sure there wasn’t an error. After that, manipulate the $data variable however you want.
Why there isn’t an «ftp_get_contents» function, I don’t know. It takes a little work to emulate one, but it’s doable.
function ftp_get_contents ( $ftp_stream , $remote_file , $mode , $resume_pos = null ) $pipes = stream_socket_pair ( STREAM_PF_UNIX , STREAM_SOCK_STREAM , STREAM_IPPROTO_IP );
if( $pipes === false ) return false ;
if(! stream_set_blocking ( $pipes [ 1 ], 0 )) fclose ( $pipes [ 0 ]); fclose ( $pipes [ 1 ]);
return false ;
>
$fail = false ;
$data = » ;
if( is_null ( $resume_pos )) $ret = ftp_nb_fget ( $ftp_stream , $pipes [ 0 ], $remote_file , $mode );
> else $ret = ftp_nb_fget ( $ftp_stream , $pipes [ 0 ], $remote_file , $mode , $resume_pos );
>
while( $ret == FTP_MOREDATA ) while(! $fail && ! feof ( $pipes [ 1 ])) $r = fread ( $pipes [ 1 ], 8192 );
if( $r === » ) break;
if( $r === false )< $fail = true ; break; >
$data .= $r ;
>
$ret = ftp_nb_continue ( $ftp_stream );
>
while(! $fail && ! feof ( $pipes [ 1 ])) $r = fread ( $pipes [ 1 ], 8192 );
if( $r === » ) break;
if( $r === false )< $fail = true ; break; >
$data .= $r ;
>
fclose ( $pipes [ 0 ]); fclose ( $pipes [ 1 ]);
if( $fail || $ret != FTP_FINISHED ) return false ;
return $data ;
>
?>
Something similar would work to write a ftp_put_contents function, too.
Here’s a quick function that figures out the correct mode to use based on a file’s extension.
function get_ftp_mode ( $file )
<
$path_parts = pathinfo ( $file );
if (!isset( $path_parts [ ‘extension’ ])) return FTP_BINARY ;
switch ( strtolower ( $path_parts [ ‘extension’ ])) case ‘am’ :case ‘asp’ :case ‘bat’ :case ‘c’ :case ‘cfm’ :case ‘cgi’ :case ‘conf’ :
case ‘cpp’ :case ‘css’ :case ‘dhtml’ :case ‘diz’ :case ‘h’ :case ‘hpp’ :case ‘htm’ :
case ‘html’ :case ‘in’ :case ‘inc’ :case ‘js’ :case ‘m4’ :case ‘mak’ :case ‘nfs’ :
case ‘nsi’ :case ‘pas’ :case ‘patch’ :case ‘php’ :case ‘php3’ :case ‘php4’ :case ‘php5’ :
case ‘phtml’ :case ‘pl’ :case ‘po’ :case ‘py’ :case ‘qmail’ :case ‘sh’ :case ‘shtml’ :
case ‘sql’ :case ‘tcl’ :case ‘tpl’ :case ‘txt’ :case ‘vbs’ :case ‘xml’ :case ‘xrc’ :
return FTP_ASCII ;
>
return FTP_BINARY ;
>
// sample usage
ftp_get ( $conn_id , $local_file , $server_file , get_ftp_mode ( $server_file ));
?>
ftp_sync is a way to walk the directory structure on the server and copy every directory and file to the same location locally.
$ftp_server = «ftp.example.com» ;
$conn_id = ftp_connect ( $ftp_server )
or die( «Couldn’t connect to $ftp_server » );
$login_result = ftp_login ( $conn_id , «user» , «pass» );
if ((! $conn_id ) || (! $login_result ))
die( «FTP Connection Failed» );
ftp_sync ( «DirectoryToCopy» ); // Use «.» if you are in the current directory
// ftp_sync — Copy directory and file structure
function ftp_sync ( $dir )
if ( $dir != «.» ) <
if ( ftp_chdir ( $conn_id , $dir ) == false ) <
echo ( «Change Dir Failed: $dir \r\n» );
return;
>
if (!( is_dir ( $dir )))
mkdir ( $dir );
chdir ( $dir );
>
$contents = ftp_nlist ( $conn_id , «.» );
foreach ( $contents as $file )
if ( $file == ‘.’ || $file == ‘..’ )
continue;
if (@ ftp_chdir ( $conn_id , $file )) <
ftp_chdir ( $conn_id , «..» );
ftp_sync ( $file );
>
else
ftp_get ( $conn_id , $file , $file , FTP_BINARY );
>
ftp_chdir ( $conn_id , «..» );
chdir ( «..» );
// define some variables
$folder_path = «YOUR FOLDER PATH» ;
$local_file = «LOCAL FILE PATH» ;
$server_file = «SERVER FILE PATH» ;
//— Connection Settings
$ftp_server = «IP ADDRESS» ; // Address of FTP server.
$ftp_user_name = «USERNAME» ; // Username
$ftp_user_pass = «PASSWORD» ; // Password
#$destination_file = «FILEPATH»;
// 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 );
// try to download $server_file and save to $local_file
if ( ftp_get ( $conn_id , $local_file , $server_file , FTP_BINARY )) echo «Successfully written to $local_file \n» ;
> else echo «There was a problem\n» ;
>
// close the connection
ftp_close ( $conn_id );
?>
Note that PHP still defaults to FTP active mode by default, which is almost never used anymore since the creation of firewalls. Don’t forget to add a ftp_pasv($conn, true) after your ftp_login.
If you ran the example and see that it fail after 90sec (timeout).
Then try adding:
ftp_pasv ( $ftp_conn , true );
?>
Crud. The _nb_ only refers to reading from the ftp server, and the buffer in the socket pair is only about 364 bytes. So it doesn’t work for files larger than that size.
If someone will try to download files to the same local file (some temporary file), like shown here:
foreach ( $files as $key => $path ) .
$result = ftp_get ( $ftpConnId , ‘temp.tmp’ , $path , FTP_BINARY );
.
>
?>
please take in consideration the fact that you will have big problems with downloading (getting) hole files. In other words ‘temp.tmp’ file always will have the same size equal to first downloaded file despite the real size of downloading file. I have not idea what is the reason!
If someone will think that problem is just in getting proper file size (which you will get using filssize() function) he will be mistaken. The download file’s size is not equal to source file’s size materially, that means fflush() function will not solve the problem (I have tried this as well).
Finally the solution was founded: before downloading a file you will need to delete local file if such exist (‘temp.tmp’). So working code will look like:
foreach ( $files as $key => $path ) .
if ( file_exists ( ‘temp.tmp’ )) unlink ( ‘temp.tmp’ );
>
$result = ftp_get ( $ftpConnId , ‘temp.tmp’ , $path , FTP_BINARY );
.
>
?>
Good luck in scripting 🙂
The zero size file is not a side effect. When the ftp_get starts the first thing it does is to create the inode/file which it will stream the data too and that is a zero size file with the nname you specified for the local file. When the download fails it leaves the file in place.
If you previously downloaded a file before (like a huge web log), and just want to get the remaining portion, do this:
$local_file_size = filesize($local_file_path);
$get_result = ftp_get($conn_id, $local_file_path, $remote_file_path, FTP_BINARY, $local_file_size);
This same code works regardless of wether the local file exists already or not. You should first test to make sure the local file is not bigger than the remote file.
On Windows (and possibly *NIX) you will get «[function.ftp-get]: failed to open stream: No such file or directory in. » errors if the local_file path contains directory paths that do not already exist.
Even with write permissions ftp_get can create the file but it will NOT automatically create the parent directories as you might expect.
I am using ftp_get function to download a file from the FTP server to my web server where my php script is running.
On the webserver, I want the file to be downloaded to a directory which has a structure as follows -> Data/Files/localfilename.exe
However, when I specify the above string in the $local_file_name parameter of ftp_get I get an error saying the file does not exist.
I am running a Windows Server and the php script is running from C:/xampp/htdocs/file.php
Is there any way where I can specify the path on the web server where the file is supposed to be downloaded ?
I’d suggest use ftp_fget() instead of ftp_get() since the latter only return TRUE or FALSE and there’s no obvious way to get the cause of failure.
Using ftp_fget, you have to pass a file handle as local file, so you have to do fopen() first. By way of this, you can find ‘Permission Denied’ problem when call fopen(). If you use ftp_get(), there’s no way to find this error cause.
In my case, I run httpd using ‘nobody’ and I create ftp local folder using ‘haha’. It tooks me long time to find the ‘Permission Denied’ problem at that time since I use ftp_get() then.
A subtle issue with the ftp_get() function. The second param, string $local_file, is a file name on the SERVER running the php script. It is NOT a file on the client machine running the browser. I erroneously tried to use this ftp to download a file from my site to my local system. I entered the full path starting with the drive letter («h:/. «) on a system running WIN XP and kept getting a failure of unable to open (destination) file. Only after just putting in a file name with no pathing did I see where the file was written. It was in the directory on my site where the php script is located (hosting is managed shared LAMP server which supports multiple url’s, GoDaddy hosting).
Remember to use the full server paths to the directories you are working on. Server paths are not the same as «ftp paths».
I was using the path displayed on my FTP client to download and upload files and I kept getting «Not found» or «Permission Denied» errors.
PHP MySQL connection using PDO
Before using database we need to connect it first. This process is common in all types of database irrespective of language we use. We will learn here the code for connecting to MySQL database using PDO class.
PHP Data Object PDO installation or enable and creating connection string to manage MySQL database
It is always a good practice to keep the database connection details at a common place and call it from different pages where it is required. This helps in maintaining the code when the database connection details changes or the script is shifted to different server with different connection details. If we are not using a common file then to change the database details we need not change the connection string in all the files. By keeping all details at one place if we update the details then all the files will use the same ( updated ) details.
We can keep the connection details in config.php file or any other file name you find suitable. All the codes inside this file are to be within the PHP code block, so it will not be exposed if it is opened directly in browser.
Let us start with the basic connection code in PDO for PHP & MySQL ( PHP MySQL Connection code for old system is here )
The code below is kept inside config.php file and can be connected from any other file in the script.
catch (PDOException $e) < print "Error!: " . $e->getMessage() . "
"; die(); > ?>Here the variables $host_name is the name of the MySQL server host or ip address ( ‘localhost’ or ‘127.0.0.1’)
To get the database connection we have to keep these two lines inside any file and start using the database
Google Cloud & MySQL connection using PDO
catch (PDOException $e) < print "Error!: " . $e->getMessage() . "
"; die(); > /// Sample script to display records //// $sql="select * from student "; echo ""; foreach ($dbo->query($sql) as $row) < echo "$row[name]
"; ?>