XLVI. FTP Functions

Introduction

The functions in this extension implement client access to file servers speaking the File Transfer Protocol (FTP) as defined in http://www.faqs.org/rfcs/rfc959. This extension is meant for detailed access to an FTP server providing a wide range of control to the executing script. If you only wish to read from or write to a file on an FTP server, consider using the ftp:// wrapper with the filesystem functions which provide a simpler and more intuitive interface.

Requirements

No external libraries are needed to build this extension.

Installation

In order to use FTP functions with your PHP configuration, you should add the --enable-ftp option when installing PHP 4 or greater or --with-ftp when using PHP 3.

The windows version of PHP has built in support for this extension. You do not need to load any additional extension in order to use these functions.

Runtime Configuration

This extension has no configuration directives defined in php.ini.

Resource Types

This extension uses one resource type, which is the link identifier of the FTP connection, returned by ftp_connect() or ftp_ssl_connect().

Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

FTP_ASCII (integer)
FTP_TEXT (integer)
FTP_BINARY (integer)
FTP_IMAGE (integer)
FTP_TIMEOUT_SEC (integer): See ftp_set_option() for information.

The following constants were introduced in PHP 4.3.0.

FTP_AUTOSEEK (integer): See ftp_set_option() for information.
FTP_AUTORESUME (integer): Automatically determine resume position and start position for GET and PUT requests (only works if FTP_AUTOSEEK is enabled)
FTP_FAILED (integer): Asynchronous transfer has failed
FTP_FINISHED (integer): Asynchronous transfer has finished
FTP_MOREDATA (integer): Asynchronous transfer is still active

Examples

Example 1. FTP example


<?php
// 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); 

// check connection
if ((!$conn_id) || (!$login_result)) { 
        echo "FTP connection has failed!";
        echo "Attempted to connect to $ftp_server for user $ftp_user_name"; 
        exit; 
    } else {
        echo "Connected to $ftp_server, for user $ftp_user_name";
    }

// upload the file
$upload = ftp_put($conn_id, $destination_file, $source_file, FTP_BINARY); 

// check upload status
if (!$upload) { 
        echo "FTP upload has failed!";
    } else {
        echo "Uploaded $source_file to $ftp_server as $destination_file";
    }

// close the FTP stream 
ftp_close($conn_id); 
?>

Table of Contents
ftp_alloc -- Allocates space for a file to be uploaded
ftp_cdup -- Changes to the parent directory
ftp_chdir -- Changes the current directory on a FTP server
ftp_chmod -- Set permissions on a file via FTP
ftp_close -- Closes an FTP connection
ftp_connect -- Opens an FTP connection
ftp_delete -- Deletes a file on the FTP server
ftp_exec -- Requests execution of a command on the FTP server
ftp_fget -- Downloads a file from the FTP server and saves to an open file
ftp_fput -- Uploads from an open file to the FTP server
ftp_get_option -- Retrieves various runtime behaviours of the current FTP stream
ftp_get -- Downloads a file from the FTP server
ftp_login -- Logs in to an FTP connection
ftp_mdtm -- Returns the last modified time of the given file
ftp_mkdir -- Creates a directory
ftp_nb_continue -- Continues retrieving/sending a file (non-blocking)
ftp_nb_fget -- Retrieves a file from the FTP server and writes it to an open file (non-blocking)
ftp_nb_fput -- Stores a file from an open file to the FTP server (non-blocking)
ftp_nb_get -- Retrieves a file from the FTP server and writes it to a local file (non-blocking)
ftp_nb_put -- Stores a file on the FTP server (non-blocking)
ftp_nlist -- Returns a list of files in the given directory
ftp_pasv -- Turns passive mode on or off
ftp_put -- Uploads a file to the FTP server
ftp_pwd -- Returns the current directory name
ftp_quit -- Alias of ftp_close()
ftp_raw -- Sends an arbitrary command to an FTP server
ftp_rawlist -- Returns a detailed list of files in the given directory
ftp_rename -- Renames a file or a directory on the FTP server
ftp_rmdir -- Removes a directory
ftp_set_option -- Set miscellaneous runtime FTP options
ftp_site -- Sends a SITE command to the server
ftp_size -- Returns the size of the given file
ftp_ssl_connect -- Opens an Secure SSL-FTP connection
ftp_systype -- Returns the system type identifier of the remote FTP server