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Network Funkcje
PHP Manual

# fsockopen

(PHP 4, PHP 5)

fsockopen — Open Internet or Unix domain socket connection

### Opis

resource fsockopen ( string `$hostname` [, int `$port` = -1 [, int `&$errno` [, string `&$errstr` [, float `$timeout` = ini_get("default_socket_timeout") ]]]] )

Initiates a socket connection to the resource specified by `hostname` .

PHP supports targets in the Internet and Unix domains as described in List of Supported Socket Transports. 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().

### Parametry

`hostname`

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

`port`

  The port number.

`errno`

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

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

`errstr`

  The error message as a string.

`timeout`

  The connection timeout, in seconds.

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

### Zwracane wartości

fsockopen() returns a file pointer which may be used together with the other file functions (such as fgets(), fgetss(), fwrite(), fclose(), and feof()). If the call fails, it will return `FALSE`

### Błędy/Wyjątki

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

### Rejestr zmian

Wersja | Opis
--- | ---
4.3.0 | Added support for the `timeout` parameter on win32.
4.3.0 | SSL and TLS over TCP/IP support was added.
4.0.0 | UDP support was added.

### Przykłady

Przykład #1 fsockopen() 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);
}
?>`

Przykład #2 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);
}
?>`

### Notatki

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

Ostrzeżenie

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.

> Informacja: Podając numerycznie adres IPv6 (np. fe80::1), adres musi być objęty nawiasami kwadratowymi. Na przykład tcp://[fe80::1]:80.

### Zobacz też:

- pfsockopen() - Open persistent Internet or Unix domain socket connection
- stream_set_blocking() - Set blocking/non-blocking mode on a stream
- stream_set_timeout() - Set timeout period on a stream
- fgets() - Pobiera linię ze wskaźnika pliku
- fgetss() - Pobiera linię ze wskaźnika pliku i usuwa tagi HTML
- fwrite() - Zapis pliku binarnie bezpieczny
- fclose() - Zamyka otwarty wskaźnik pliku
- feof() - Sprawdza czy wskaźnik pliku jest na końcu pliku (EOF)
- The Curl extension

dns_get_record
gethostbyaddr
Network Funkcje
PHP Manual