PHP/Network/DNS Validation
DNS Validation Demo
<source lang="html4strict">
<html> <head> <title> hostname validator </title> </head> <body> <?php $hostname = "www.wbex.ru"; if (!isset($hostname)) {
die("Hostname value wasn"t properly submitted. Retry.");
}
if(empty($hostname)){
die("Hostname field was left blank ! Retry.");
} echo "". $hostname ." ";
if(checkdnsrr($hostname)) {
echo "has a valid MX record !
";
}else{
die("does not exist");
} ?> </body> </html>
</source>