Redhat DNS Entry

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LEARN ABOUT PHP

socket-context-options

SOCKET-CONTEXT-OPTIONS(3)						 1						 SOCKET-CONTEXT-OPTIONS(3)

Socket context options - Socket context option listing

	Socket context options are available for all wrappers that work over sockets, like tcp, http and ftp.

	      o $bindto
		-  Used to specify the IP address (either IPv4 or IPv6) and/or the port number that PHP will use to access the network. The syntax
		is ip:port for IPv4 addresses, and [ip]:port for IPv6 addresses. Setting the IP or the port to 0 will let the system choose the IP
		and/or port.

	      Note

		      As FTP creates two socket connections during normal operation, the port number cannot be specified using this option.

	      o $backlog
		- Used to limit the number of outstanding connections in the socket's listen queue.

	      Note

		      This is only applicable to stream_socket_server(3).

       +--------+-----------------+
       |Version |		  |
       |	|		  |
       |	|   Description   |
       |	|		  |
       +--------+-----------------+
       | 5.3.3	|		  |
       |	|		  |
       |	|  Added backlog. |
       |	|		  |
       | 5.1.0	|		  |
       |	|		  |
       |	|  Added bindto.  |
       |	|		  |
       +--------+-----------------+
       Example #1

	      Basic $bindto usage example

	      <?php
	      // connect to the internet using the '192.168.0.100' IP
	      $opts = array(
		  'socket' => array(
		      'bindto' => '192.168.0.100:0',
		  ),
	      );

	      // connect to the internet using the '192.168.0.100' IP and port '7000'
	      $opts = array(
		  'socket' => array(
		      'bindto' => '192.168.0.100:7000',
		  ),
	      );

	      // connect to the internet using the '2001:db8::1' IPv6 address
	      // and port '7000'
	      $opts = array(
		  'socket' => array(
		      'bindto' => '[2001:db8::1]:7000',
		  ),
	      );

	      // connect to the internet using port '7000'
	      $opts = array(
		  'socket' => array(
		      'bindto' => '0:7000',
		  ),
	      );

	      // create the context...
	      $context = stream_context_create($opts);

	      // ...and use it to fetch the data
	      echo file_get_contents('http://www.example.com', false, $context);

	      ?>

PHP Documentation Group 												 SOCKET-CONTEXT-OPTIONS(3)

UNIX for Dummies Questions & Answers