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);

只是对上面的函数进行了编辑，当键是数字时，添加前缀“key_”

// initializing or creating array
$student_info = array(your array data);

// creating object of SimpleXMLElement
$xml_student_info = new SimpleXMLElement("<?xml version=\"1.0\"?><student_info></student_info>");

// function call to convert array to xml
array_to_xml($student,$xml_student_info);

//saving generated xml file
$xml_student_info->asXML('file path and name');


function array_to_xml($student_info, &$xml_student_info) {
     foreach($student_info as $key => $value) {
          if(is_array($value)) {
            if(!is_numeric($key)){
                $subnode = $xml_student_info->addChild("$key");
                array_to_xml($value, $subnode);
            }
            else{
                $subnode = $xml_student_info->addChild("key_$key");
                array_to_xml($value, $subnode);
            }
          }
          else {
               if(!is_numeric($key)){
                    $xml_student_info->addChild("$key","$value");
               }else{
                    $xml_student_info->addChild("key_$key","$value");
               }
          }
     }
}

我想要一个代码，将一个数组内的所有元素，并把它们作为属性，所有数组作为子元素。

对于像这样的东西

array (
'row1' => array ('head_element' =>array("prop1"=>"some value","prop2"=>array("empty"))),
"row2"=> array ("stack"=>"overflow","overflow"=>"overflow")
);

我会得到这样的结果

<?xml version="1.0" encoding="utf-8"?>
<someRoot>
  <row1>
    <head_element prop1="some value">
      <prop2 0="empty"/>
    </head_element>
  </row1>
  <row2 stack="overflow" overflow="stack"/>
 </someRoot>

要实现这一点，代码如下，但要非常小心，它是递归的，实际上可能会导致stackoverflow:)

function addElements(&$xml,$array)
{
$params=array();
foreach($array as $k=>$v)
{
    if(is_array($v))
        addElements($xml->addChild($k), $v);
    else $xml->addAttribute($k,$v);
}

}
function xml_encode($array)
{
if(!is_array($array))
    trigger_error("Type missmatch xml_encode",E_USER_ERROR);
$xml=new SimpleXMLElement('<?xml version=\'1.0\' encoding=\'utf-8\'?><'.key($array).'/>');
addElements($xml,$array[key($array)]);
return $xml->asXML();
} 

您可能希望添加数组长度检查，以便在数据部分中设置某些元素，而不是作为属性。

我发现所有的答案都是使用过多的代码。这里有一个简单的方法:

function to_xml(SimpleXMLElement $object, array $data)
{   
    foreach ($data as $key => $value) {
        if (is_array($value)) {
            $new_object = $object->addChild($key);
            to_xml($new_object, $value);
        } else {
            // if the key is an integer, it needs text with it to actually work.
            if ($key != 0 && $key == (int) $key) {
                $key = "key_$key";
            }

            $object->addChild($key, $value);
        }   
    }   
}   

然后，将数组发送到使用递归的函数中就很简单了，因此它将处理多维数组:

$xml = new SimpleXMLElement('<rootTag/>');
to_xml($xml, $my_array);

现在$xml包含了一个漂亮的xml对象，它完全基于您编写数组的方式。

print $xml->asXML();

以上答案大部分是正确的。然而，我想出了这个答案，它解决了array_walk_recursive的兼容性问题，也解决了数值键的问题。它也通过了我做的所有测试:

function arrayToXML(Array $array, SimpleXMLElement &$xml) {

    foreach($array as $key => $value) {

        // None array
        if (!is_array($value)) {
            (is_numeric($key)) ? $xml->addChild("item$key", $value) : $xml->addChild($key, $value);
            continue;
        }   

        // Array
        $xmlChild = (is_numeric($key)) ? $xml->addChild("item$key") : $xml->addChild($key);
        arrayToXML($value, $xmlChild);
    }
}   

我还为此添加了一个测试类，你可能会发现有用:

class ArrayToXmlTest extends PHPUnit_Framework_TestCase {

    public function setUp(){ }
    public function tearDown(){ }

    public function testFuncExists() {
        $this->assertTrue(function_exists('arrayToXML'));
    }

    public function testFuncReturnsXml() {
        $array = array(
            'name' => 'ardi',
            'last_name' => 'eshghi',
            'age' => 31,
            'tel' => '0785323435'
        );

        $xmlEl =  new SimpleXMLElement('<root/>');
        arrayToXml($array, $xmlEl);

        $this->assertTrue($xmlEl instanceOf SimpleXMLElement);
    }

    public function testAssocArrayToXml() {

        $array = array(
            'name' => 'ardi',
            'last_name' => 'eshghi',
            'age' => 31,
            'tel' => '0785323435'
        );

        $expectedXmlEl = new SimpleXMLElement('<root/>'); 
        $expectedXmlEl->addChild('name', $array['name']);
        $expectedXmlEl->addChild('last_name', $array['last_name']);
        $expectedXmlEl->addChild('age', $array['age']);
        $expectedXmlEl->addChild('tel', $array['tel']);

        $actualXmlEl =  new SimpleXMLElement('<root/>');
        arrayToXml($array, $actualXmlEl);

        $this->assertEquals($expectedXmlEl->asXML(), $actualXmlEl->asXML());
    }

    public function testNoneAssocArrayToXml() {

        $array = array(
            'ardi',
            'eshghi',
            31,
            '0785323435'
        );

        // Expected xml value
        $expectedXmlEl = new SimpleXMLElement('<root/>'); 
        foreach($array as $key => $value)
            $expectedXmlEl->addChild("item$key", $value);

        // What the function produces       
        $actualXmlEl =  new SimpleXMLElement('<root/>');
        arrayToXml($array, $actualXmlEl);

        $this->assertEquals($expectedXmlEl->asXML(), $actualXmlEl->asXML());
    }

    public function testNestedMixArrayToXml() {

        $testArray = array(
            "goal",
            "nice",
            "funny" => array(
                'name' => 'ardi',
                'tel'   =>'07415517499',
                "vary",
                "fields" => array(
                    'small',
                    'email' => 'ardi.eshghi@gmail.com'
                ),

                'good old days'

            ),

            "notes" => "come on lads lets enjoy this",
            "cast" => array(
                'Tom Cruise',
                'Thomas Muller' => array('age' => 24)
            )
        );

        // Expected xml value
        $expectedXmlEl = new SimpleXMLElement('<root/>'); 
        $expectedXmlEl->addChild('item0', $testArray[0]);
        $expectedXmlEl->addChild('item1', $testArray[1]);
        $childEl = $expectedXmlEl->addChild('funny');
        $childEl->addChild("name", $testArray['funny']['name']);
        $childEl->addChild("tel", $testArray['funny']['tel']);
        $childEl->addChild("item0", "vary");
        $childChildEl = $childEl->addChild("fields");
        $childChildEl->addChild('item0', 'small');
        $childChildEl->addChild('email', $testArray['funny']['fields']['email']);
        $childEl->addChild("item1", 'good old days');
        $expectedXmlEl->addChild('notes', $testArray['notes']);
        $childEl2 = $expectedXmlEl->addChild('cast');
        $childEl2->addChild('item0', 'Tom Cruise');
        $childChildEl2 = $childEl2->addChild('Thomas Muller');
        $childChildEl2->addChild('age', $testArray['cast']['Thomas Muller']['age']);

        // What the function produces       
        $actualXmlEl = new SimpleXMLElement('<root/>');
        arrayToXml($testArray, $actualXmlEl);

        $this->assertEquals($expectedXmlEl->asXML(), $actualXmlEl->asXML());
    }
}      

我认为上面所有的解决方案都很好，但我看到目前为止，它并没有真正创建一个准确的格式良好的XML，因为数组键与$my_array[main_node][multiple_values][] = ARRAY ('id' => '1')然后转换为

    <main_node>
       <multiple_values>
         <0>
           <id>1 test</id>
         </0>
       </multiple_values>
       <multiple_values>
         <1>
          <id>2 test</id>
         </1>
       </multiple_values>
    </main_node>

这是XML解析器方面的一个问题……

I should be like this:

    <main_node>
     <multiple_values>
      <id>1 test</id>
     </multiple_values>
     <multiple_values>
      <id>2 test</id>
     </multiple_values>
    </main_node>

如果你用load_simple_xml来解析…你会得到完全相同的数组/对象结构。

我的函数还自动创建正确的根节点。

    // Code to convert php array to xml document 20211112
    function array2xml(array $data, $xml_class_obj = '', $group_by_parent_allowed = '', $options = array())
        {   
            
            if(!$xml_class_obj) :
                $is_root = 1;
                $xml_class_obj = new XMLWriter();
                $xml_class_obj->openMemory();
                $xml_class_obj->setIndent(TRUE);
                $xml_class_obj->setIndentString('   ');
                if($options['encoding'] != '')  $xml_class_obj->startDocument('1.0', $options['encoding']);
                else                                                        $xml_class_obj->startDocument('1.0');
            endif;
            
            foreach ($data as $key => $value) {

                if (is_array($value)) { // IS ARRAY

                    // check if allow below keys are int, if yes group them to same parent tree
                    $group_by_parent = $key;
                    foreach(array_keys($value) as $c_keys) :
                        if(!is_int($c_keys)) $group_by_parent = '';
                    endforeach;

                    if(empty($group_by_parent)) $xml_class_obj->startElement($key); 
                    if($group_by_parent_allowed != '') $xml_class_obj->startElement($group_by_parent_allowed);
                    
                    $this->array2xml($value, $xml_class_obj, $group_by_parent, $options);
                    
                    if(empty($group_by_parent)) $xml_class_obj->endElement();  

                } else { // IS VALUE
                    
                    if(is_string($value)) :
                        $xml_class_obj->startElement($key);
                        $xml_class_obj->writeCData($value);         
                        $xml_class_obj->endElement();           
                    else :
                        $xml_class_obj->writeElement($key, $value); 
                    endif;

                }

            } // foreach
            
            if($group_by_parent_allowed != '')  $xml_class_obj->endElement(); 
            
            if($is_root == 1) :
            
                $xml_class_obj->endDocument();
                return $xml_class_obj->outputMemory();
            else :              
                return $xml_class_obj;                  
            endif;
              
        }  
    
    // usage
    $ary_new_xml = array();
    $ary_new_xml['order']['customer']['customerid'] = '123456'; 
    $ary_new_xml['order']['customer']['customertype'] = 15; 
            
    $ary_new_xml['order']['orderprio'] = 2; 
            
    $ary_new_xml['order']['orderpos'][] = array('sku' => 9999910001111, 'quantity' => 3);           
    $ary_new_xml['order']['orderpos'][] = array('sku' => 9999910002222, 'quantity' => 1); 
            
echo array2xml($ary_new_xml,'','',array('enconding' => 'UTF-8'));

结果:

<?xml version="1.0" encoding="UTF-8"?>
<order>
   <customer>
      <customerid>82936639</customerid>
      <customertype>15</customertype>
   </customer>
   <orderprio>2</orderprio>
   <orderpos>
      <sku>9999910001111</sku>
      <quantity>3</quantity>
   </orderpos>
   <orderpos>
      <sku>9999910002222</sku>
      <quantity>1</quantity>
   </orderpos>
</order>


 

我希望这能帮助到一些人;)