root/ext/xmlwriter/examples/xmlwriter_file.php

<?php
dl('xmlwriter.so');

$xw = xmlwriter_open_uri('./a.xml');
xmlwriter_set_indent($xw, 1);
$res = xmlwriter_set_indent_string($xw, ' ');

xmlwriter_start_document($xw, '1.0', 'UTF-8');

// A first element
xmlwriter_start_element($xw, 'tag1');

// Attribute 'att1' for element 'tag1'
xmlwriter_start_attribute($xw, 'att1');
xmlwriter_text($xw, 'valueofatt1');
xmlwriter_end_attribute($xw);

xmlwriter_write_comment($xw, 'this is a comment.');

// Start a child element
xmlwriter_start_element($xw, 'tag11');
xmlwriter_text($xw, utf8_encode('This is a sample text, ä'));
xmlwriter_end_element($xw); // tag11

xmlwriter_end_element($xw); // tag1


// CDATA
xmlwriter_start_element($xw, 'testc');
xmlwriter_write_cdata($xw, "This is a cdata content");
xmlwriter_end_element($xw); // testctag

xmlwriter_start_element($xw, 'testc');
xmlwriter_start_cdata($xw);
xmlwriter_text($xw, "test cdata2");
xmlwriter_end_cdata($xw);
xmlwriter_end_element($xw); // testctag

// A processing instruction
xmlwriter_start_pi($xw, 'php');
xmlwriter_text($xw, '$foo=2;echo $foo;');
xmlwriter_end_pi($xw);

xmlwriter_end_document($xw);