XMLWriter::openMemory()

(PHP 5 >= 5.1.2, PHP 7, PECL xmlwriter >= 0.1.0)

Create new xmlwriter using memory for string output

说明

面向对象风格
XMLWriter::openMemory(void): bool

过程化风格
xmlwriter_open_memory(void): resource

Creates a new XMLWriter using memory for string output.

参数

返回值

面向对象风格:成功时返回TRUE，或者在失败时返回FALSE。

过程化风格: Returns a new xmlwriter 资源(resource) for later use with the xmlwriter functions on success,FALSE on error.

参见

• XMLWriter::openUri() Create new xmlwriter using source uri for output

Here is an simple example of using openMemory. This is particularly useful when you are handling a large amount of data and you want to split the xml creation in batches.
<?php
$batchSize = 25;
$xmlWriter = new XMLWriter();
$xmlWriter->openUri('php://output');
$xmlWriter->setIndent(true);
if($xmlWriter)
{
 $xmlWriter->startDocument('1.0','UTF-8');
 $xmlWriter->startElement('Books');
 
 $memXmlWriter = new XMLWriter();
 
 $memXmlWriter->openMemory();
 $memXmlWriter->setIndent(true);
 
 for($i=1;$i<=1000;$i++)
 {
  $memXmlWriter->startElement('book');
   $memXmlWriter->text('book_'.$i);
  $memXmlWriter->endElement();
  
  if($i%5 == 0)
  {
   $batchXmlString = $memXmlWriter->outputMemory(true);
   $xmlWriter->writeRaw($batchXmlString);
  }
 }
 $memXmlWriter->flush();
 unset($memXmlWriter);
 $xmlWriter->endElement();
 $xmlWriter->endDocument(); 
}
?>

A simple usage example:
<?php
header('Content-type: text/xml; charset=UTF-8');
$oXMLWriter = new XMLWriter;
$oXMLWriter->openMemory();
$oXMLWriter->startDocument('1.0', 'UTF-8');
$oXMLWriter->startElement('test');
$oXMLWriter->text('Hello, World!');
$oXMLWriter->endElement();
$oXMLWriter->endDocument();
echo $oXMLWriter->outputMemory(TRUE);
?>