Php implements the checkdnsrr function on the window platform. windowcheckdnsrr_PHP tutorial

Php implements the checkdnsrr function of the window platform, windowcheckdnsrr. Php implements the checkdnsrr function on the window platform. the built-in checkdnsrr function of windowcheckdnsrrPHP is only valid on the linux platform. It is used to solve the problem of compatibility when it is unavailable on the window platform. php implements the checkdnsrr function and windowcheckdnsrr function of the window platform.

PHP's built-in checkdnsrr function is only valid on the linux platform. It makes compatibility troublesome if it is not used on the window platform.

Therefore, a checkdnsrr simulation function is written for use in the Windows platform environment.

if (!function_exists('checkdnsrr ')) {  function checkdnsrr($host, $type) {    if(!empty($host) && !empty($type)) {      @exec('nslookup -type=' . escapeshellarg($type) . ' ' . escapeshellarg($host), $output);      foreach ($output as $k => $line) {        if(eregi('^' . $host, $line)) {          return true;        }      }    }    return false;  }}

The built-in checkdnsrr function of PostgreSQL is only valid on the linux platform. It is used to bring compatibility troubles if it is unavailable on the window platform...