PHP | getprotobyname() Function

PHP | getservbyport() Function

Last Updated : 30 Aug, 2019

The getservbyport() function is an inbuilt function in PHP which returns the Internet service for given protocol and port number.

Syntax:

string getservbyport( int $port, string $protocol)

Parameters: This function accepts two parameters as mentioned above and described below:

$protocol: It is required parameter. It specifies the protocol name, like tcp, udp etc.
$port: It is required parameter. It specifies the port number, like 80.

Return Value: This function returns the Internet Service name on success.

Note: This function is available for PHP 4.0.0 and newer version.

Below programs illustrate the getservbyport() function in PHP:

Program 1:

<?php 
  
// Use getservbyport() function to get 
// the Internet service which corresponds 
// to port and protocol 
$intservname = getservbyport(80, "tcp"); 
  
// Display the output 
echo $intservname; 
  
?> 

Output:

http

Program 2:

<?php 
   
// Create an array of port numbers 
$port = array(21, 22, 23, 25, 80); 
  
// Loop run for each services 
foreach( $port as $index) { 
      
    // Use getservbyport() function to get 
    // the Internet service which corresponds 
    // to port and protocol 
    echo $index . ": " .getservbyport($index, "tcp") 
            . "<br>"; 
} 
  
?> 

Output:

21: ftp
22: ssh
23: telnet
25: smtp
80: http

Reference: https://www.php.net/manual/en/function.getservbyport.php

PHP | getprotobyname() Function

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