Options usable with the HttpRequest class and request functions

timeout (integer): seconds the whole request may take to complete
connecttimeout (integer): seconds the connect, including name resolving, may take
dns_cache_timeout (integer): seconds after an dns cache entry times out

url (string): the request url
port (integer): use another port as specified in the url
redirect (integer): whether and how many redirects to follow; defaults to 0
unrestrictedauth (bool): whether to continue sending credentials on redirects to a different host
referer (string): the refererring url to send

encodecookies (bool): whether custom cookies should be urlencode()d prior sending
cookies (array): list of cookies as associative array like array("cookie" => "value")
cookiestore (string): path to a file where cookies are/will be stored
cookiesession (bool): don't load session cookies from cookiestore if TRUE

useragent (string): the user agent to send; defaults to PECL::HTTP/x.y.z (PHP/x.y.z); omitted if explicitly set to an empty string
lastmodified (int): timestamp for If-(Un)Modified-Since header
etag (string): quoted etag for If-(None-)Match header
headers (array): list of custom headers as associative array like array("header" => "value")

compress (bool): whether to request and accept a gzip/deflate content encoded response
resume (int): start the download at the specified byte offset if server support is given (indicated by a 206 response code)
range (array): array of arrays, each containing two integers, specifying the ranges to download if server support is given (indicated by a 206 response code); only recognized if the resume option is empty

maxfilesize (integer): maximum file size that should be downloaded; has no effect, if the size of the requested entity is unknown (eg. dynamic pages with chunked transfer encoding etc.)
low_speed_limit (int): the lowest transfer speed a successful request may have
low_speed_time (int): the time in which low_speed_limit must be transferred for a successful request
max_send_speed (int): maximum send speed in bytes per second
max_recv_speed (int): maximum receive speed in bytes per second

ssl (array)

SSL options

Note: SSL options are set through an array with the single "ssl" request option name.