(PECL event >= 1.2.6-beta)
EventDnsBase::parseResolvConf — Scans the resolv.conf-formatted file
$flags
   , 
    string
     $filename
   ): boolScans the resolv.conf-formatted file stored in filename, and read in all the options from it that are listed in flags
flags
    
      Determines what information is parsed from the
      resolv.conf
      file. See the man page for
      resolv.conf
      for the format of this file.
     
      The following directives are not parsed from the file:
      sortlist, rotate, no-check-names, inet6, debug
      .
     
If this function encounters an error, the possible return values are:
1 = failed to open file2 = failed to stat file3 = file too large4 = out of memory5 = short read from file6 = no nameservers listed in the filefilename
    
      Path to
      resolv.conf
      file.
     
   成功时返回 true, 或者在失败时返回 false。