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php实现window平台的checkdnsrr函数_php实例

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Release: 2016-06-07 17:12:49
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PHP的自带checkdnsrr函数只在linux平台有效。使用惯了在window平台不能使用的话给兼容性带来麻烦。

因此写了个checkdnsrr模拟函数在window平台环境使用。

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;
  }
}
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