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PHP to look up country and domain details from an IP
DNS example from a Well House Consultants training course
More on DNS [link]
Source code: resolve.php Module: A193
if ($valid > 0) { // If we have a good IP address .. // Use the Maxmind database to find out the probable country. // (Refer to http://www.maxmind.com for this PHP function) if (preg_match('/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/',$ip)) { $rv = getcountry($ip); if ($rv[id]) { print ("IP address points us to $rv[name] / $rv[id] / $rv[code]<br>"); if ($valid == 2 ) { print ("You entered a computer name. This country may be where "); print ("the company's computers are located - perhaps at an ISP<br>"); } } else { print ("IP address does not determine country / region<br>"); $nonspecific = 1; } $reg = ""; // If there's a known registry for the country in question, which one? if (ereg('^(GB|IE|DE|EU|AD|AT|BE|CH|DK|ES|FI|FR|FX|GI|GR|LI|LU|MC|NO|NL|PT|SE|VE)$', $rv[code])) { $reg = "whois.ripe.net"; } if (ereg('^(US|CA)$', $rv[code])) { $reg = "whois.arin.net"; } if ($reg) { print ("<br><b>IP Address registry Information from $reg</b>"); if (ereg("^192\.168",$_SERVER[REMOTE_ADDR])) { $fullipinfo = `whois -h $reg $ip`; } else { $fullipinfo = "Lookup of $ip at $reg disabled on public server"; } print ("<br><PRE>$fullipinfo</PRE><br>"); } else { if ($nonspecific == 1) { print ("<br><b>We cannot look up further IP details in this instance.</b> ". "This may be an IP address from a local network, it may be ". "incorrectly entered or setup, or it may be newly registered</b><br>"); } else { print ("<br><b>We do not yet look up IP details in this country</b><br>"); } } } else { print ("<br><b>We do not have an IP address to look up in the registry</b><br>"); } // If we have a good Domain Name .. // No need to use MaxMind here ... straight to the registry! $dbname = ""; $sname = ""; if (preg_match('/([-a-zA-Z0-9]+)\.([a-zA-Z]{2,6})$/',$hname,$hnp)) { if (ereg('^(co|me|org|plc|ltd|net|sch)$',$hnp[1]) and $hnp[2] == "uk") { if (preg_match('/([-a-zA-Z0-9]+)\.([-a-zA-Z0-9]+)\.([a-zA-Z]{2,6})$/',$hname,$hnp)) { $dbname = "whois.nic.uk"; $sname = "$hnp[1].$hnp[2].uk"; } } if (ereg('^(gov|ac)$',$hnp[1]) and $hnp[2] == "uk") { if (preg_match('/([-a-zA-Z0-9]+)\.([-a-zA-Z0-9]+)\.([a-zA-Z]{2,6})$/',$hname,$hnp)) { $dbname = "whois.ja.net"; $sname = "$hnp[1].$hnp[2].uk"; } } if (ereg('^(net|edu)$',$hnp[2])) { $dbname = "whois.networksolutions.com"; $sname = "$hnp[1].$hnp[2]"; } if (ereg('^(com)$',$hnp[2])) { $dbname = "whois.totalregistrations.com"; $sname = "$hnp[1].$hnp[2]"; } if (ereg('^(int)$',$hnp[2])) { $dbname = "whois.icann.org"; $sname = "$hnp[1].$hnp[2]"; } if (ereg('^(ie)$',$hnp[2])) { $dbname = "whois.domainregistry.ie"; $sname = "$hnp[1].$hnp[2]"; } if (ereg('^(nl)$',$hnp[2])) { $dbname = "whois.domain-registry.nl"; $sname = "$hnp[1].$hnp[2]"; } if (ereg('^(co)$',$hnp[1]) and $hnp[2] == "za") { if (preg_match('/([-a-zA-Z0-9]+)\.([-a-zA-Z0-9]+)\.([a-zA-Z]{2,6})$/',$hname,$hnp)) { $dbname = "http://co.za/cgi-bin/whois.sh"; $sname = "Domain=$hnp[1]"; $viaweb = 1; } } if ($dbname != "") { print ("<br><b>Domain Name registry information from $dbname</b>"); if ($viaweb == 1) { $fullnameinfo = strip_tags(join("",file($dbname."?".$sname))); } else { if (ereg("^192\.168",$_SERVER[REMOTE_ADDR])) { $fullnameinfo = `whois -h $dbname $sname`; } else { $fullnameinfo = "Lookup of $sname at $dbname disabled on public server"; } } print ("<br><PRE>$fullnameinfo</PRE><br>"); } else { print ("<br><b>We do not yet look up host details in this top level domain</b><br>"); } } else { print ("<br><b>We do not have a full host name to look up in the registry</b><br>"); } } Learn about this subject
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Other Examples
This example comes from our "DNS" training module. You'll find a description of the topic and some
other closely related examples on the "DNS" module index page.
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