PHP | getprotobyname() Function
Last Updated :
03 Sep, 2019
The getprotobyname() function is an inbuilt function in PHP which returns the protocol number for a specified protocol name.
Syntax:
int getprotobyname( string $name )
Parameters: This function accepts single parameter $name which is required. It specifies the protocol name, like tcp, icmp, udp, ip etc.
Return Value: This function returns the protocol number on success and FALSE on failure.
Note: This function is available for PHP 4.0.0 and newer version.
Below programs illustrate the getprotobyname() function in PHP:
Program 1: This program gets the protocol number for protocol name “tcp”.
<?php
$protocolnum = getprotobyname ( "tcp" );
echo $protocolnum ;
?>
|
Output:
6
Program 2: This program checking the many protocols name.
<?php
$protocols = array ( "tcp" , "udp" , "hmp" , "ipv6" );
foreach ( $protocols as $protocol ){
$protocol_name = getprotobyname ( $protocol );
echo $protocol_name . ": " . $protocol . "<br>" ;
}
?>
|
Output:
6: tcp
17: udp
20: hmp
41: ipv6
Reference: https://www.php.net/manual/en/function.getprotobyname.php
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