/**
* Runs a transformation
*
* @param string xml
* @param string callback
* @param string[] arguments
* @param string xslEncoding default 'utf-8'
* @return string
*/
protected function runTransformation($xml, $callback, $arguments, $xslEncoding = 'utf-8')
{
sscanf($callback, '%[^:]::%s', $name, $method);
$p = new DomXSLProcessor();
$p->registerInstance('this', $this);
$p->setXMLBuf($xml);
$p->setXSLBuf(sprintf('<?xml version="1.0" encoding="%s"?>
<xsl:stylesheet
version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:php="http://php.net/xsl"
>
<xsl:output method="text"/>
<xsl:template match="/">
<xsl:value-of select="php:function(\'XSLCallback::invoke\', \'%s\', \'%s\'%s)"/>
</xsl:template>
</xsl:stylesheet>
', $xslEncoding, $name, $method, $arguments ? ', ' . implode(', ', $arguments) : ''));
$p->run();
return $p->output();
}
