fsockopen

Open Internet or Unix domain socket connection

 **fsockopen** string $hostname int $port int $error_code string $error_message  $timeout

Initiates a socket connection to the resource specified by . hostname

PHP supports targets in the Internet and Unix domains as described in . A list of supported transports can also be retrieved using . stream_get_transports

The socket will by default be opened in blocking mode. You can switch it to non-blocking mode by using . stream_set_blocking

The function is similar but provides a richer set of options, including non-blocking connection and the ability to provide a stream context. stream_socket_client

hostname If OpenSSL support , you may prefix the with either or to use an SSL or TLS client connection over TCP/IP to connect to the remote host. is installedhostname``ssl://``tls://

port The port number. This can be omitted and skipped with for transports that do not use ports, such as . -1``unix://

error_code If provided, holds the system level error number that occurred in the system-level call. connect()

   If the value returned in  is
    and the function returned false, it is an
   indication that the error occurred before the 
    call. This is most likely due to a
   problem initializing the socket.
  `error_code``0``connect()`

error_messageThe error message as a string.

timeout The connection timeout, in seconds. When null, the php.ini setting is used. default_socket_timeout

Opmerking: > If you need to set a timeout for reading/writing data over the socket, use , as the parameter to only applies while connecting the socket. stream_set_timeout``timeout``fsockopen

returns a file pointer which may be used

together with the other file functions (such as , , , , and ). If the call fails, it will return false fsockopen``fgets``fgetss``fwrite``fclose``feof

Throws if is not a valid domain. E_WARNING``hostname

Voorbeeld: Example

<?php
$fp = fsockopen("www.example.com", 80, $errno, $errstr, 30);
if (!$fp) {
    echo "$errstr ($errno)<br />\n";
} else {
    $out = "GET / HTTP/1.1\r\n";
    $out .= "Host: www.example.com\r\n";
    $out .= "Connection: Close\r\n\r\n";
    fwrite($fp, $out);
    while (!feof($fp)) {
        echo fgets($fp, 128);
    }
    fclose($fp);
}
?>

Voorbeeld: Using UDP connection

The example below shows how to retrieve the day and time from the UDP service "daytime" (port 13) in your own machine.

<?php
$fp = fsockopen("udp://127.0.0.1", 13, $errno, $errstr);
if (!$fp) {
    echo "ERROR: $errno - $errstr<br />\n";
} else {
    fwrite($fp, "\n");
    echo fread($fp, 26);
    fclose($fp);
}
?>

Opmerking: > Depending on the environment, the Unix domain or the optional connect timeout may not be available.

Waarschuwing: > UDP sockets will sometimes appear to have opened without an error, even if the remote host is unreachable. The error will only become apparent when you read or write data to/from the socket. The reason for this is because UDP is a "connectionless" protocol, which means that the operating system does not try to establish a link for the socket until it actually needs to send or receive data.

pfsockopen``stream_socket_client``stream_set_blocking``stream_set_timeout``fgets``fgetss``fwrite``fclose``feof``socket_connectCurl extension

Vorige ← dns_get_record Volgende gethostbyaddr →

fsockopen

fsockopen

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