php unit for performing HTTP GET and POST requests.

By : igosha

<?php


/*! This function performs a http POST query (i.e. form submission) and
* returns the received response.
\return FALSE Something went wrong, possibly the server refused your query or
the connection to the server failed.
\return The response string.
*/
function http_post($server /**< Server's or proxie's host name or IP.*/,
$port, /**< Server's or proxie's port */
$url, /**< Should point to the URL on the server or full address if a proxy is used. */
$cookie, /**< The optional cookie string. */
$vars /**< Associative array of POST variables. Each key is the name of the variable and the value
is the variable's content */
)
{
$user_agent = "Mozilla/4.0 (compatible; MSIE 5.5; Windows 98)";


$urlencoded = "";
while (list($key,$value) = each($vars))
$urlencoded.= urlencode($key) . "=" . urlencode($value) . "&";
$urlencoded = substr($urlencoded,0,-1);

$content_length = strlen($urlencoded);

$headers = "POST $url HTTP/1.1\r\nHost: $server\r\nAccept: */*\r\nAcceptLanguage: en-au\r\nConnection: close\r\nContent-Type: application/x-www-form-urlencoded\r\nUser-Agent: $user_agent\r\nCache-Control: no-cache\r\nCookie: {$cookie}\r\nContent-Length: $content_length\r\n\r\n";

$fp = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);

if (!socket_connect($fp, $server, $port))
{
socket_close($fp);
return false;
}

socket_set_option($fp, SOL_SOCKET, SO_KEEPALIVE, TRUE);
socket_send($fp, $headers, strlen($headers), 0);
socket_send($fp, $urlencoded, strlen($urlencoded), 0);

$ret = "";
while ($rd = socket_read($fp, 1024))
{
$ret .= $rd;
}

socket_close($fp);

$pos = strpos($ret, "\r\n\r\n");

if (!is_bool($pos))
{
$ret = substr($ret, $pos);
}

return $ret;

}

/** This function performs a http GET query (i.e. download a web page or file) and
* returns the received response.
\return FALSE Something went wrong, possibly the server refused your query or
the connection to the server failed.
\return The response string.
*/
function http_get($server, /**< Server's or proxie's host name or IP.*/
$port, /**< Server's or proxie's port */
$url, /**< Should point to the URL on the server or full address if a proxy is used. */
$cookie, /**< The optional cookie string. */
$additional_fields = "" /**< Optional string containing additional HTTP request fields,
each terminated by "\r\n". */)
{
$user_agent = "Mozilla/4.0 (compatible; MSIE 5.5; Windows 98)";

$headers = "GET $url HTTP/1.1\r\nAccept: */*\r\nAccept-Language: en-au\r\nUser-Agent: $user_agent\r\nHost: $server\r\nCookie: {$cookie}\r\nCache-Control: no-cache\r\nConnection: close\r\n{$additional_fields}\r\n";

$fp = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
if (!socket_connect($fp, $server, $port))
{
socket_close($fp);
return FALSE;
}

socket_set_option($fp, SOL_SOCKET, SO_KEEPALIVE, TRUE);
socket_send($fp, $headers, strlen($headers), 0);

$ret = "";
while ($rd = socket_read($fp, 1024))
{
$ret .= $rd;
}

socket_close($fp);

$pos = strpos($ret, "\r\n\r\n");

if (!is_bool($pos))
{
$ret = substr($ret, $pos);
}

return $ret;
}

?>

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