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copied!<p>The <em>SimpleXML</em> extension is limited to format the output, it's sister extension, <a href="http://php.net/DOMDocument" rel="nofollow noreferrer"><em>DOMDocument</em></a> has support for output formatting. The XML string from your example and making use of <code>DOMDocument::$preserveWhiteSpace</code> and <code>DOMDocument::$formatOutput</code> to control the formatttings:</p> <pre><code>$doc = new DOMDocument(); $doc->preserveWhiteSpace = false; $doc->formatOutput = true; $doc->loadXML($string); echo $doc->saveXML(); </code></pre> <p>This will output a nicely indented XML with the linebreaks where you have asked for them:</p> <pre><code><?xml version="1.0" encoding="utf-8"?> <items> <item> <title>title3</title> <desc>This is some desc3</desc> </item> <empty/> </items> </code></pre> <p>If you further need to manipulate the indent, you can make use of regular expressions which has been outlined in a related question and answer: <strong><em><a href="https://stackoverflow.com/q/8616594/367456">Converting indentation with preg_replace (no callback)</a></em></strong>.</p> <p>If you don't want to use that method you could also switch from SimpleXML to something else and then to XMLWriter which provides a method to set the indentation (<a href="http://www.php.net/manual/en/function.xmlwriter-set-indent.php" rel="nofollow noreferrer">XMLWriter::setIndent</a>) of printed XML. You would need to find an interim representation of your XML model to write it with <code>XMLWriter</code> however which does not look that trivial.</p>

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