   #PHP Manual Network Functions getmxrr getprotobynumber

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                                getprotobyname

   (PHP 4 )
   getprotobyname --  Get protocol number associated with protocol name

Description

   int getprotobyname ( string name)

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

   Example 1. getprotobyname() example
   <?php
   $protocol = 'tcp';
   $get_prot = getprotobyname($protocol);
   if ($get_prot == -1) {
       // if nothing found, returns -1
       echo 'Invalid Protocol';
   } else {
       echo 'Protocol #' . $get_prot;
   }
   ?>

   See also: getprotobynumber().
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