我有两台服务器

服务器A使用读取http://www.some-url.com/xmlwriter_src.php

$reader = new XMLReader();
$reader->open('http://www.some-url.com/xmlwriter_src.php');
while ($reader->read()) 
{
  /* -- do something -- */
}

服务器B创建一个xml流

$writer = new XMLWriter();
$writer->openURI('php://output');
$writer->startDocument("1.0");

$writer->startElement("records");
while(!$recordset->EOF)
{
  $writer->startElement($fieldname) 
  $writer->text($recordset->fields[$fieldname]);
  $writer->endElement();
  $recordset->movenext();
}

服务器A上的xmlreader一直在抱怨服务器B没有响应,即使我可以在浏览器中看到xml结果.

生成需要不到一秒的时间

如果我将xml复制到静态文件,xmlreader将输出该文件.

解决方法:

默认情况下,写入器将缓冲输出.
一旦完成,你必须调用flush().

$writer = new XMLWriter();
$writer->openURI('php://output');
$writer->startDocument("1.0");

$writer->startElement("records");
while(!$recordset->EOF)
{
  $writer->startElement($fieldname) 
  $writer->text($recordset->fields[$fieldname]);
  $writer->endElement();
  $recordset->movenext();
}
$writer->flush();

顺便说说：
 你在哪里关闭记录元素？