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# XXXIII. 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.html.

# 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 `--with-ftp` when using PHP 3.

# 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.

# 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";
            die;
        } 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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