php数组转换成xml文件php类

<?php
$elementLevel = 0;
function array_Xml($array, $keys = &#39;&#39;) {
    global $elementLevel;
    if (!is_array($array)) {
        if ($keys == &#39;&#39;) {
            return $array;
        } else {
            return "n<$keys>" . $array . "</$keys>";
        }
    } else {
        foreach ($array as $key => $value) {
            $haveTag = true;
            if (is_numeric($key)) {
                $key = $keys;
                $haveTag = false;
            }
            /**  
             * The first element
             */
            if ($elementLevel == 0) {
                $startElement = "<$key>";
                $endElement = "</$key>";
            }
            $text.= $startElement . "n";
            /**  
             * Other elements
             */
            if (!$haveTag) {
                $elementLevel++;
                $text.= "<$key>" . array_Xml($value, $key) . "</$key>n";
            } else {
                $elementLevel++;
                $text.= array_Xml($value, $key);
            }
            $text.= $endElement . "n";
        }
    }
    return $text;
}
class ArrayToXML {
    /**  
     * The main function for converting to an XML document.
     * Pass in a multi dimensional array and this recrusively loops教程 through and builds up an XML document.
     *
     * @param array $data
     * @param string $rootNodeName - what you want the root node to be - defaultsto data.
     * @param SimpleXMLElement $xml - should only be used recursively
     * @return string XML
     */
    public static function toXml($data, $rootNodeName = &#39;data&#39;, $xml = null) {
        // turn off compatibility mode as simple xml throws a wobbly if you don&#39;t.
        if (ini_get(&#39;zend.ze1_compatibility_mode&#39;) == 1) {
            ini_set(&#39;zend.ze1_compatibility_mode&#39;, 0);
        }
        if ($xml == null) {
            $xml = simplexml_load_string("<?xml version=&#39;1.0&#39; encoding=&#39;utf-8&#39;<$rootNodeName />");
        }
        // loop through the data passed in.
        foreach ($data as $key => $value) {
            // no numeric keys in our xml please!
            if (is_numeric($key)) {
                // make string key...
                $key = "unknownNode_" . (string)$key;
            }
            // replace anything not alpha numeric
            $key = preg_replace(&#39;/[^a-z]/i&#39;, &#39;&#39;, $key);
            // if there is another array found recrusively call this function
            if (is_array($value)) {
                $node = $xml->addChild($key);
                // recrusive call.
                ArrayToXML::toXml($value, $rootNodeName, $node);
            } else {
                // add single node.
                $value = htmlentities($value);
                $xml->addChild($key, $value);
            }
        }
        // pass back as string. or simple xml object if you want!
        return $xml->asXML();
    }
}
function arrtoxml($arr, $dom = 0, $item = 0) {
    if (!$dom) {
        $dom = new DOMDocument("1.0");
    }
    if (!$item) {
        $item = $dom->createElement("root");
        $dom->appendChild($item);
    }
    foreach ($arr as $key => $val) {
        $itemx = $dom->createElement(is_string($key) ? $key : "item");
        $item->appendChild($itemx);
        if (!is_array($val)) {
            $text = $dom->createTextNode($val);
            $itemx->appendChild($text);
        } else {
            arrtoxml($val, $dom, $itemx);
        }
    }
    return $dom->saveXML();
}