PHP simpleXML how to save the file in a formatted way?

I'm trying add some data to an existing XML file using PHP's SimpleXML. The problem is it adds all the data in a single line:

<name>blah</name><class>blah</class><area>blah</area> ...

And so on. All in a single line. How to introduce line breaks?

How do I make it like this?

<name>blah</name>
<class>blah</class>
<area>blah</area>

I am using asXML() function.

Thanks.

From stackoverflow

• You could use the DOMDocument class to reformat your code:

  $dom = new DOMDocument('1.0');
  $dom->preserveWhiteSpace = false;
  $dom->formatOutput = true;
  $dom->loadXML($simpleXml->asXML());
  echo $dom->saveXML();
  

• There's also the PEAR XML_Beautifier package.

• Use dom_import_simplexml to convert to a DomElement. Then use its capacity to format output.

  $dom = dom_import_simplexml($simple_xml);
  $dom->preserveWhiteSpace = false;
  $dom->formatOutput = true;
  echo $dom->documentElement->saveXML($dom);
  

• Gumbo's solution does the trick. You can do work with simpleXml above and then add this at the end to echo and/or save it with formatting.

  Code below echos it and saves it to a file (see comments in code and remove whatever you don't want):

  //Format XML to save indented tree rather than one line
  $dom = new DOMDocument('1.0');
  $dom->preserveWhiteSpace = false;
  $dom->formatOutput = true;
  $dom->loadXML($simpleXml->asXML());
  //Echo XML - remove this and following line if echo not desired
  echo $dom->saveXML();
  //Save XML to file - remove this and following line if save not desired
  $dom->save('fileName.xml');
  

• Cool solution Gumbo