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<?php
namespace Laminas\Config\Writer;
use Laminas\Config\Exception;
use XMLWriter;
use function is_array;
use function is_numeric;
use function str_repeat;
class Xml extends AbstractWriter
{
/**
* processConfig(): defined by AbstractWriter.
*
* @param array $config
* @return string
*/
public function processConfig(array $config)
{
$writer = new XMLWriter();
$writer->openMemory();
$writer->setIndent(true);
$writer->setIndentString(str_repeat(' ', 4));
$writer->startDocument('1.0', 'UTF-8');
$writer->startElement('laminas-config');
foreach ($config as $sectionName => $data) {
if (! is_array($data)) {
$writer->writeElement($sectionName, (string) $data);
} else {
$this->addBranch($sectionName, $data, $writer);
}
}
$writer->endElement();
$writer->endDocument();
return $writer->outputMemory();
}
/**
* Add a branch to an XML object recursively.
*
* @param string $branchName
* @param array $config
* @return void
* @throws Exception\RuntimeException
*/
protected function addBranch($branchName, array $config, XMLWriter $writer)
{
$branchType = null;
foreach ($config as $key => $value) {
if ($branchType === null) {
if (is_numeric($key)) {
$branchType = 'numeric';
} else {
$writer->startElement($branchName);
$branchType = 'string';
}
} elseif ($branchType !== (is_numeric($key) ? 'numeric' : 'string')) {
throw new Exception\RuntimeException('Mixing of string and numeric keys is not allowed');
}
if ($branchType === 'numeric') {
if (is_array($value)) {
$this->addBranch($branchName, $value, $writer);
} else {
$writer->writeElement($branchName, (string) $value);
}
} else {
if (is_array($value)) {
$this->addBranch($key, $value, $writer);
} else {
$writer->writeElement($key, (string) $value);
}
}
}
if ($branchType === 'string') {
$writer->endElement();
}
}
}