Here's a short explanation of
the configuration directives.
allow_url_fopenbool
This option enables the URL-aware fopen wrappers that enable
accessing URL object like files. Default wrappers are provided for
the access of remote files
using the ftp or http protocol, some extensions like
zlib may register additional
wrappers.
allow_url_includebool
This option allows the use of URL-aware fopen wrappers with the following
functions: include, include_once,
require, require_once.
Note:
This setting requires allow_url_fopen to be on.
user_agentstring
Define the user agent for PHP to send.
default_socket_timeoutint
Default timeout (in seconds) for socket based streams.
Specifying a negative value means an infinite timeout.
fromstring
The email address to be used on unauthenticated FTP connections and
as the value of From header for HTTP connections, when using the ftp
and http wrappers, respectively.
auto_detect_line_endingsbool
When turned on, PHP will examine the data read by
fgets and file to see if it
is using Unix, MS-Dos or Macintosh line-ending conventions.
This enables PHP to interoperate with Macintosh systems,
but defaults to Off, as there is a very small performance penalty
when detecting the EOL conventions for the first line, and also
because people using carriage-returns as item separators under
Unix systems would experience non-backwards-compatible behaviour.