鱼漂 (一直漂)

checkdnsrr and getmxrr do not work on windows making resolution of email address a pain in the bum. Use these functions instead and you'll get the same functionality.

[code]
<?php
/******************************************************

These functions can be used on WindowsNT to replace
their built-in counterparts that do not work as
expected.

checkdnsrr_winNT() works just the same, returning true
or false

getmxrr_winNT() returns true or false and provides a
list of MX hosts in order of preference.

*******************************************************/

function checkdnsrr_winNT( $host, $type = '' )
{
  if( !empty( $host ) )
  {
      # Set Default Type:
      if( $type == '' ) $type = "MX";
      @exec( "nslookup -type=$type $host", $output );
      while( list( $k, $line ) = each( $output ) )
      {
          # Valid records begin with host name:
          if( eregi( "^$host", $line ) )
          {
              # record found:
              return true;
          }
      }
      return false;
  }
}

function getmxrr_winNT( $hostname, &$mxhosts )
{
  if( !is_array( $mxhosts ) ) $mxhosts = array();
  if( !empty( $hostname ) )
  {
      @exec( "nslookup -type=MX $hostname", $output, $ret );
      while( list( $k, $line ) = each( $output ) )
      {
          # Valid records begin with hostname:
          if( ereg( "^$hostname\tMX preference = ([0-9]+), mail exchanger = (.*)$", $line, $parts ) )
          {
              $mxhosts[ $parts[1] ] = $parts[2];
          }
      }
      if( count( $mxhosts ) )
      {
          reset( $mxhosts );
          ksort( $mxhosts );
          $i = 0;
          while( list( $pref, $host ) = each( $mxhosts ) )
          {
              $mxhosts2[$i] = $host;
              $i++;
          }
          $mxhosts = $mxhosts2;
          return true;
      }
      else
      {
          return false;
      }
  }
}

?>[/code]