我的答案，拼凑别人的答案。这应该可以纠正无法补偿数字键的错误:

function array_to_xml($array, $root, $element) {
    $xml = new SimpleXMLElement("<{$root}/>");
    foreach ($array as $value) {
        $elem = $xml->addChild($element);
        xml_recurse_child($elem, $value);
    }
    return $xml;
}

function xml_recurse_child(&$node, $child) {
    foreach ($child as $key=>$value) {
        if(is_array($value)) {
            foreach ($value as $k => $v) {
                if(is_numeric($k)){
                    xml_recurse_child($node, array($key => $v));
                }
                else {
                    $subnode = $node->addChild($key);
                    xml_recurse_child($subnode, $value);
                }
            }
        }
        else {
            $node->addChild($key, $value);
        }
    }   
}

array_to_xml()函数假定数组首先由数字键组成。如果数组有一个初始元素，则可以从array_to_xml()函数中删除foreach()和$elem语句，只传递$xml。

我使用了几个函数，我写了一段时间来生成xml来回传递从PHP和jQuery等… 既不使用任何额外的框架，只是单纯地生成一个字符串，然后可以使用SimpleXML(或其他框架)…

如果它对任何人有用，请使用它:)

function generateXML($tag_in,$value_in="",$attribute_in=""){
    $return = "";
    $attributes_out = "";
    if (is_array($attribute_in)){
        if (count($attribute_in) != 0){
            foreach($attribute_in as $k=>$v):
                $attributes_out .= " ".$k."=\"".$v."\"";
            endforeach;
        }
    }
    return "<".$tag_in."".$attributes_out.((trim($value_in) == "") ? "/>" : ">".$value_in."</".$tag_in.">" );
}

function arrayToXML($array_in){
    $return = "";
    $attributes = array();
    foreach($array_in as $k=>$v):
        if ($k[0] == "@"){
            // attribute...
            $attributes[str_replace("@","",$k)] = $v;
        } else {
            if (is_array($v)){
                $return .= generateXML($k,arrayToXML($v),$attributes);
                $attributes = array();
            } else if (is_bool($v)) {
                $return .= generateXML($k,(($v==true)? "true" : "false"),$attributes);
                $attributes = array();
            } else {
                $return .= generateXML($k,$v,$attributes);
                $attributes = array();
            }
        }
    endforeach;
    return $return;
}   

爱所有人:)

其他解决方案:

$marray=array(....);
$options = array(
                "encoding" => "UTF-8",
                "output_type" => "xml", 
                "version" => "simple",
                "escaping" => array("non-ascii, on-print, markup")
                );
$xmlres = xmlrpc_encode_request('root', $marray, $options);
print($xmlres);

function array2xml($array, $xml = false){

    if($xml === false){

        $xml = new SimpleXMLElement('<?xml version=\'1.0\' encoding=\'utf-8\'?><'.key($array).'/>');
        $array = $array[key($array)];

    }
    foreach($array as $key => $value){
        if(is_array($value)){
            $this->array2xml($value, $xml->addChild($key));
        }else{
            $xml->addChild($key, $value);
        }
    }
    return $xml->asXML();
}

function toXML($data, $obj = false, $dom) {
    $is_first_level = false;
    if($obj === false) {
        $dom = new DomDocument('1.0');
        $obj = $dom;
        $is_first_level = true;
    }

    if(is_array($data)) {
        foreach($data as $key => $item) {
            $this->toXML($item, $obj->appendChild($dom->createElement($key)), $dom);
        }
    }else {
        $obj->appendChild($dom->createTextNode($data));
    }

    if($is_first_level) {
        $obj->formatOutput = true;
        return $obj->saveXML();
    }
    return $obj;
}

如果你使用magento，你有这种类型的关联数组

$test_array = array (
    '0' => array (
            'category_id' => '582',
            'name' => 'Surat',
            'parent_id' => '565',
            'child_id' => '567',
            'active' => '1',
            'level' => '6',
            'position' => '17'
    ),

    '1' => array (
            'category_id' => '567', 
            'name' => 'test',
            'parent_id' => '0',
            'child_id' => '576',
            'active' => '0',
            'level' => '0',
            'position' => '18'
    ),
);

那么最好将关联数组转换为XML格式。在控制器文件中使用此代码。

$this->loadLayout(false);
//header ("content-type: text/xml");
$this->getResponse()->setHeader('Content-Type','text/xml');
$this->renderLayout();

$clArr2xml = new arr2xml($test_array, 'utf-8', 'listdata');
$output = $clArr2xml->get_xml();
print $output; 

class arr2xml
{
var $array = array();
var $xml = '';
var $root_name = '';
var $charset = '';

public function __construct($array, $charset = 'utf-8', $root_name = 'root')
{
    header ("content-type: text/xml");
    $this->array = $array;
    $this->root_name = $root_name;
    $this->charset = $charset;

    if (is_array($array) && count($array) > 0) {
        $this->struct_xml($array);

    } else {
        $this->xml .= "no data";
    }
}

public function struct_xml($array)
{
    foreach ($array as $k => $v) {
        if (is_array($v)) {
            $tag = ereg_replace('^[0-9]{1,}', 'item', $k); // replace numeric key in array to 'data'
            $this->xml .= "<$tag>";
            $this->struct_xml($v);
            $this->xml .= "</$tag>";
        } else {
            $tag = ereg_replace('^[0-9]{1,}', 'item', $k); // replace numeric key in array to 'data'
            $this->xml .= "<$tag><![CDATA[$v]]></$tag>";
        }
    }
}

public function get_xml()
{

    $header = "<?xml version=\"1.0\" encoding=\"" . $this->charset . "\"?><" . $this->root_name . ">";
    $footer = "</" . $this->root_name . ">";

    return $header . $this->xml . $footer;
}
}

我希望这对大家都有帮助。