reader = new XMLReader; } public function unserialize($string) { $this->reader->XML($string); $this->reader->read(); if ('AST' !== $this->reader->name) { throw new DomainException('AST root element not found'); } return $this->read($this->reader->depth); } protected function read($depthLimit, $throw = true, &$nodeFound = null) { $nodeFound = true; while ($this->reader->read() && $depthLimit < $this->reader->depth) { if (XMLReader::ELEMENT !== $this->reader->nodeType) { continue; } if ('node' === $this->reader->prefix) { return $this->readNode(); } elseif ('scalar' === $this->reader->prefix) { return $this->readScalar(); } elseif ('comment' === $this->reader->name) { return $this->readComment(); } else { throw new DomainException(sprintf('Unexpected node of type "%s"', $this->reader->name)); } } $nodeFound = false; if ($throw) { throw new DomainException('Expected node or scalar'); } } protected function readNode() { $className = $this->getClassNameFromType($this->reader->localName); // create the node without calling it's constructor $node = unserialize( sprintf( "O:%d:\"%s\":1:{s:13:\"\0*\0attributes\";a:0:{}}", strlen($className), $className ) ); $depthLimit = $this->reader->depth; while ($this->reader->read() && $depthLimit < $this->reader->depth) { if (XMLReader::ELEMENT !== $this->reader->nodeType) { continue; } $type = $this->reader->prefix; if ('subNode' !== $type && 'attribute' !== $type) { throw new DomainException( sprintf('Expected sub node or attribute, got node of type "%s"', $this->reader->name) ); } $name = $this->reader->localName; $value = $this->read($this->reader->depth); if ('subNode' === $type) { $node->$name = $value; } else { $node->setAttribute($name, $value); } } return $node; } protected function readScalar() { switch ($name = $this->reader->localName) { case 'array': $depth = $this->reader->depth; $array = array(); while (true) { $node = $this->read($depth, false, $nodeFound); if (!$nodeFound) { break; } $array[] = $node; } return $array; case 'string': return $this->reader->readString(); case 'int': $text = $this->reader->readString(); if (false === $int = filter_var($text, FILTER_VALIDATE_INT)) { throw new DomainException(sprintf('"%s" is not a valid integer', $text)); } return $int; case 'float': $text = $this->reader->readString(); if (false === $float = filter_var($text, FILTER_VALIDATE_FLOAT)) { throw new DomainException(sprintf('"%s" is not a valid float', $text)); } return $float; case 'true': case 'false': case 'null': if (!$this->reader->isEmptyElement) { throw new DomainException(sprintf('"%s" scalar must be empty', $name)); } return constant($name); default: throw new DomainException(sprintf('Unknown scalar type "%s"', $name)); } } protected function readComment() { $className = $this->reader->getAttribute('isDocComment') === 'true' ? 'PhpParser\Comment\Doc' : 'PhpParser\Comment' ; return new $className( $this->reader->readString(), $this->reader->getAttribute('line') ); } protected function getClassNameFromType($type) { $className = 'PhpParser\\Node\\' . strtr($type, '_', '\\'); if (!class_exists($className)) { $className .= '_'; } if (!class_exists($className)) { throw new DomainException(sprintf('Unknown node type "%s"', $type)); } return $className; } }