title: whois lookups on the IP addresses
body: <blockquote>
    <p>$ host 64.34.119.12
        12.119.34.64.in-addr.arpa domain name pointer stackoverflow.com.</p>
  </blockquote>
  
  <p>How is this Carried out in php? I am planning to do lookup for searching Google's ip. How do i do implement this?</p>
  
  <p>Like in above example it is stalkoverflow.com</p>
  
  <p>I want to determine their netblock and do strstr on their netblock for "google"</p>
  
  <p>if it is matched, it will , <code>echo "Yeah , its google"</code></p>