socket_write(3) [php man page]

SOCKET_WRITE(3) 							 1							   SOCKET_WRITE(3)

socket_write - Write to a socket

SYNOPSIS

       int socket_write (resource  $socket, string  $buffer, [int  $length])

DESCRIPTION

	The function socket_write(3) writes to the $socket from the given $buffer.

PARAMETERS

	      o $socket
		-

	      o $buffer
		- The buffer to be written.

	      o $length
		-  The	optional  parameter $length can specify an alternate length of bytes written to the socket. If this length is greater than
		the buffer length, it is silently truncated to the length of the buffer.

RETURN VALUES

	Returns the number  of	bytes  successfully  written  to  the  socket  or  FALSE  on  failure.	The  error  code  can  be  retrieved  with
       socket_last_error(3). This code may be passed to socket_strerror(3) to get a textual explanation of the error.

       Note

	       It is perfectly valid for socket_write(3) to return zero which means no bytes have been written. Be sure to use the === operator to
	      check for FALSE in case of an error.

NOTES

       Note

	      socket_write(3) does not necessarily write all bytes from the given buffer. It's valid that, depending on the network buffers  etc.,
	      only  a certain amount of data, even one byte, is written though your buffer is greater. You have to watch out so you don't uninten-
	      tionally forget to transmit the rest of your data.

SEE ALSO

       socket_accept(3), socket_bind(3), socket_connect(3), socket_listen(3), socket_read(3), socket_strerror(3).

PHP Documentation Group 													   SOCKET_WRITE(3)

SOCKET_SET_OPTION(3)							 1						      SOCKET_SET_OPTION(3)

socket_set_option - Sets socket options for the socket

SYNOPSIS

       bool socket_set_option (resource  $socket, int  $level, int  $optname, mixed  $optval)

DESCRIPTION

	The  socket_set_option(3)  function  sets  the	option specified by the $optname parameter, at the specified protocol $level, to the value
       pointed to by the $optval parameter for the $socket.

PARAMETERS

	      o $socket
		- A valid socket resource created with socket_create(3) or socket_accept(3).

	      o $level
		- The $level parameter specifies the protocol level at which the option resides. For example, to retrieve options  at  the  socket
		level, a $level parameter of SOL_SOCKET would be used. Other levels, such as TCP, can be used by specifying the protocol number of
		that level. Protocol numbers can be found by using the getprotobyname(3) function.

	      o $optname
		- The available socket options are the same as those for the socket_get_option(3) function.

	      o $optval
		- The option value.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      socket_set_option(3) example

	      <?php
	      $socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);

	      if (!is_resource($socket)) {
		  echo 'Unable to create socket: '. socket_strerror(socket_last_error()) . PHP_EOL;
	      }

	      if (!socket_set_option($socket, SOL_SOCKET, SO_REUSEADDR, 1)) {
		  echo 'Unable to set option on socket: '. socket_strerror(socket_last_error()) . PHP_EOL;
	      }

	      if (!socket_bind($socket, '127.0.0.1', 1223)) {
		  echo 'Unable to bind socket: '. socket_strerror(socket_last_error()) . PHP_EOL;
	      }

	      $rval = socket_get_option($socket, SOL_SOCKET, SO_REUSEADDR);

	      if ($rval === false) {
		  echo 'Unable to get socket option: '. socket_strerror(socket_last_error()) . PHP_EOL;
	      } else if ($rval !== 0) {
		  echo 'SO_REUSEADDR is set on socket !' . PHP_EOL;
	      }
	      ?>

PHP Documentation Group 												      SOCKET_SET_OPTION(3)