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# 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);
?>`

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