Method of Obtaining Host Name Protocol and IP Address in php

This paper describes the method of obtaining host name, protocol and IP address in php. Share it for your reference.

The specific implementation code is as follows:

$hostname=gethostbyaddr($_SERVER['remote_addr']);    // Get the host name  

echo $hostname;            // Output result  

// 

$hosts=gethostbynamel('localhost');       // Get ip Address list  

print_r($hosts);           // Output array  

// 

$protocol='tcp';        // Define a protocol name  

$get_prot=getprotobyname($protocol);   // Return agreement number  

if($get_prot==-1)       // If you can't find it  

{ 

  echo 'invalid protocol';      // Output error message  

} 

else 

{ 

  echo 'protocol #'.$get_prot;     // Output the corresponding protocol number  

} 

// 

$protocol_num='6';       // Define agreement number  

$get_prot=getprotobynumber($protocol_num);  // Returns the protocol name  

if($get_prot==-1)       // If you can't find it  

{ 

  echo 'invalid protocol';      // Output error message  

} 

else 

{ 

  echo 'protocol #'.$get_prot;     // Output the corresponding protocol name  

}

I hope this article is helpful to everyone's php programming.