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ftp_alloc

(PHP 5, PHP 7, PHP 8)

ftp_alloc — Allocates space for a file to be uploaded

Description

ftp_alloc(FTP\Connection $ftp, int $size, string &$response = null): bool

Sends an ALLO command to the remote FTP server to allocate space for a file to be uploaded.

Note:

Many FTP servers do not support this command. These servers may return a failure code (false) indicating the command is not supported or a success code (true) to indicate that pre-allocation is not necessary and the client should continue as though the operation were successful. Because of this, it may be best to reserve this function for servers which explicitly require preallocation.

Parameters

ftp

An FTP\Connection instance.

size

The number of bytes to allocate.

response

A textual representation of the servers response will be returned by reference in response if a variable is provided.

Return Values

Returns true on success or false on failure.

Changelog

Version Description
8.1.0 The ftp parameter expects an FTP\Connection instance now; previously, a resource was expected.

Examples

Example #1 ftp_alloc() example

<?php

$file = "/home/user/myfile";

// connect to the server
$ftp = ftp_connect('ftp.example.com');
$login_result = ftp_login($ftp, 'anonymous', '[email protected]');

if (ftp_alloc($ftp, filesize($file), $result)) {
  echo "Space successfully allocated on server.  Sending $file.\n";
  ftp_put($ftp, '/incoming/myfile', $file, FTP_BINARY);
} else {
  echo "Unable to allocate space on server.  Server said: $result\n";
}

ftp_close($ftp);

?>

See Also

  • ftp_put() - Uploads a file to the FTP server
  • ftp_fput() - Uploads from an open file to the FTP server

© 1997–2025 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.ftp-alloc.php