A IP Address
ANY Any records
CNAME Canonical name
MX Mail Exchanger
NS Name Server
SOA Start of a zone of authority
If an error occurs, FALSE is returned and the optional error_number and
error_description arguments are set. They must be passed by reference, which means
adding an ampersand (&) prior to the dollar sign. If the error number returned is zero, an
error occurred before PHP tried to connect. This may indicate a problem initializing the
socket.
The optional timeout argument will set the number of seconds PHP will wait for a
connection to be established. You may specify fractions of a second as well, if you wish.
The pfsockopen adds persistence to the fsockopen functionality.
//tell browser not to render this
header("Content-type: text/plain");
//try to connect to Web server,
//timeout after 60 seconds
$fp = fsockopen("www.clearink.com", 80,
&$error_number, &$error_description,
60);
if($fp)
{
//set nonblocking mode
set_socket_blocking($fp, FALSE);
// tell server we want root document
fputs($fp, "GET / HTTP/1.0");
fputs($fp, "\r\n\r\n");
while(!feof($fp))
{
//print next 4K
print(fgets($fp, 4096));
}
//close connection
fclose($fp);
}
else
{
//$connect was false
print("An error occurred
\n");
print("Number: $error_number
\n");