php man page for getprotobyname

GETPROTOBYNAME(3)							 1							 GETPROTOBYNAME(3)

getprotobyname - Get protocol number associated with protocol name

SYNOPSIS
       int getprotobyname (string  $name)

DESCRIPTION
       getprotobyname(3) returns the protocol number associated with the protocol $name as per /etc/protocols.

PARAMETERS
	      o $name
		- The protocol name.

RETURN VALUES
	Returns the protocol number, or FALSE on failure.

EXAMPLES
       Example #1

	      getprotobyname(3) example

	      <?php
	      $protocol = 'tcp';
	      $get_prot = getprotobyname($protocol);
	      if ($get_prot === FALSE) {
		  echo 'Invalid Protocol';
	      } else {
		  echo 'Protocol #' . $get_prot;
	      }
	      ?>

SEE ALSO
       getprotobynumber(3).

PHP Documentation Group 													 GETPROTOBYNAME(3)