private function buildTree($in, DocumentBuilder $doc)
{
$pattern = '$(\\[(?:/[a-z]*|[a-z]+[^\\]]*)\\])(\\n){0,1}$i';
// TOKENIZE input stream
$tokens = preg_split($pattern, $in, -1, PREG_SPLIT_DELIM_CAPTURE);
for ($i = 0; $i < count($tokens); $i++) {
$token = $tokens[$i];
/*
* If token is an open tag create a TAG object
* - Append tag to parent
* - Set node to take ownership of children
*/
if ($this->isOpenToken($token) && ($attributes = $this->parseAttributes($token)) !== null) {
$tag = $this->getTagFromToken($token);
$doc->writeStartElement($tag, $token);
foreach ($attributes as $key => $value) {
$doc->writeAttribute($key, $value);
}
if (array_key_exists($tag, $this->selfClosing)) {
$doc->writeEndElement();
}
} elseif ($this->isCloseToken($token)) {
/*
* If close tag matches open tag remove it from the stack
* Set node to parent
*/
$tagName = $this->getTagFromToken($token);
if (!$doc->writeEndElement($tagName, $token)) {
$doc->writeText($token);
}
} else {
$doc->writeText($token);
}
}
return $doc->getDOMDocument();
}
