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php中如何生成objXML

答案://start header("Content-Type:text/xml;charset=utf-8"); $xmlstr = '<person> <child role="son"><child role="daughter"/></child><child ole="daughter"><child role="son"><child role="son"/></child></child></person>'; $sxe = new SimpleXMLElement($xmlstr); echo $sxe->asXML(); //end SimpleXMLElement { SimpleXMLElement::addAttribute — Adds an attribute to the SimpleXML element SimpleXMLElement::addChild — Adds a child element to the XML node SimpleXMLElement::asXML — Return a well-formed XML string based on SimpleXML element SimpleXMLElement::attributes — Identifies an element's attributes SimpleXMLElement::children — Finds children of given node SimpleXMLElement::__construct — Creates a new SimpleXMLElement object SimpleXMLElement::getDocNamespaces — Returns namespaces declared in document SimpleXMLElement::getName — Gets the name of the XML element SimpleXMLElement::getNamespaces — Returns namespaces used in document SimpleXMLElement::registerXPathNamespace — Creates a prefix/ns context for the next XPath query SimpleXMLElement::xpath — Runs XPath query on XML data /* Methods */ void addAttribute ( string $name , string $value [, string $namespace ] ) SimpleXMLElement addChild ( string $name [, string $value [, string $namespace ]] ) mixed asXML ([ string $filename ] ) SimpleXMLElement attributes ([ string $ns [, bool $is_prefix ]] ) SimpleXMLElement children ([ string $ns [, bool $is_prefix ]] ) array getDocNamespaces ([ bool $recursive ] ) string getName ( void ) array getNamespaces ([ bool $recursive ] ) bool registerXPathNamespace ( string $prefix , string $ns ) array xpath ( string $path ) }
其他:$xmlobj = simplexml_load_file($filename);
就可以把一个文件生成xml对象 

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