PHPSocket _ PHP Tutorial

PHPSocket technology. PhpsocketSocket is based on the TCPIP transmission control protocol. It provides client-server mode asynchronous communication, that is, after the client sends a service request to the server and the server receives the request, the phpsocketSocket provides the transmission control protocol based on the TCP/IP protocol and the client-server mode for asynchronous communication. that is, after the client sends a service request to the server and the server receives the request, provide corresponding feedback or services! I practiced a basic example:

Use and initiate a blocking connection, that is, if the server does not return data streams, the connection is maintained. Once a data stream is passed in, the connection is immediately disconnected after the content is obtained. The code is as follows:

The code is as follows:

$ Host = www.sohu.com; // This address can be used for testing.
$ Page = "/index.html ";
$ Port = 80;
$ Request = "GET $ page HTTP/1.1 \ r \ n ";
$ Request. = "Host: $ host \ r \ n ";
// $ Request. = "Referer: $ host \ r \ n ";
$ Request. = "Connection: close \ r \ n ";
// The allowed connection timeout is 1.5 seconds.
$ ConnectionTimeout = 1.5;
// Allow the remote server to respond within 2 seconds
$ ResponseTimeout = 2;
// Establish a socket connection
$ Fp = fsockopen ($ host, $ port, $ errno, $ errstr, $ connectionTimeout );
If (! $ Fp ){
Throw new Exception ("Connection to $ hostfailed: $ errstr ");
} Else {
Stream_set_blocking ($ fp, true );
Stream_set_timeout ($ fp, $ responseTimeout );
}
// Send the request string
Fwrite ($ fp, $ request );
// Obtain the returned data stream content
$ Content = stream_get_contents ($ fp );
Echo $ content;
$ Meta = stream_get_meta_data ($ fp );
If ($ meta ['timed _ out']) {
Throw new Exception ("Responsefrom web services server timed out .");
}
// Close the Socket connection
Fclose ($ fp );
?>

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