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PHP Getservbyport () Function

Syntax:
string getservbyport (int $port, string $protocol )
Parameters:This function takes two parameters as above and described below:
  • $protocol:required parameter. Specifies the name of the protocol, such as tcp, udp, etc.
  • $port:required. It specifies the port number, for example 80.
Return Value:This function returns the name of the internet service on success.Note.This function is available for PHP 4.0.0 and later.The following programs illustrate the getservbyport() function in PHP:Program 1:  
// Use the getservbyport() function to get
// Internet service that matches
// port and log $intservname = getservbyport (80, "tcp" );  
// Show output echo $intservname ;  
?>
Output:
http
Program 2:  
// Create an array of port numbers $port = array (21, 22, 23, 25, 80);  
// startup loop for each service foreach ( $port as $index ) { // Use the getservbyport() function to get // internet service that matches // port and log echo $index . ":" . getservbyport ( $index , " tcp " ) . "
"
; }  
?>
Output:
21: ftp 22: ssh 23: telnet 25: smtp 80: http
Link: https://www.php.net/manual/en/function.getservbyport.php

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