您也可以通过DOM来实现这一点。请参阅下面的代码。

<?php

$el = array();
$command = array();

$dom = new DOMDocument('1.0', 'utf-8');
$dom->formatOutput = true;

$xml_array = [
    'root'=>[
    'Good guy' => [
        'name' => [
            '_cdata' => 'Luke Skywalker'
        ],
        'weapon' => 'Lightsaber'
    ],
    'Bad guy' => [
        'name' => 'Sauron',
        'weapon' => 'Evil Eye'
    ]
        ]
];

convert_xml($xml_array);

if(!empty($el))
{
    $dom->appendChild(end($el));
}

echo $dom->saveXML();

?>

<?php

 function convert_xml($Xml)
{
    global $el, $dom;

        foreach($Xml as $id=>$val)
        {
            if(is_numeric($id))
            {
                $id = "Item".($id);
            }

            $id = str_replace(' ', '-', strtolower($id));

            if(is_array($val))
            {
                $ele = $dom->createElement($id);
                array_push($el, $ele);
                convert_xml($val);
            }
            else
            {
                $ele = $dom->createElement($id, $val);

                if(!empty($el))
                {
                    $com = end($el)->appendChild($ele);
                }
                else
                {
                    $dom->appendChild($ele);
                }

            }
        }

        if(sizeof($el) > 1)
        {
            $child = end($el);
            $com = prev($el)->appendChild($child);
            array_pop($el);
        }
}

?>

<?php
function array_to_xml(array $arr, SimpleXMLElement $xml)
{
    foreach ($arr as $k => $v) {
        is_array($v)
            ? array_to_xml($v, $xml->addChild($k))
            : $xml->addChild($k, $v);
    }
    return $xml;
}

$test_array = array (
    'bla' => 'blub',
    'foo' => 'bar',
    'another_array' => array (
        'stack' => 'overflow',
    ),
);

echo array_to_xml($test_array, new SimpleXMLElement('<root/>'))->asXML();

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:)

来自PHP 5.4

function array2xml($data, $root = null){
    $xml = new SimpleXMLElement($root ? '<' . $root . '/>' : '<root/>');
    array_walk_recursive($data, function($value, $key)use($xml){
        $xml->addChild($key, $value);
    });
    return $xml->asXML();
}

如果冗长的xml不成问题，可以使用xmlrpc_encode从数组创建xml。 www.php.net/xmlrpc_encode

注意，如果使用关联键和/或数字键，创建的XML会有所不同

<?php
// /params/param/value/struct/member
// there is a tag "member" for each element
// "member" contains a tag "name". its value is the associative key
$xml1 = xmlrpc_encode(array('a'=>'b','c'=>'d'));
$simplexml1 = simplexml_load_string($xml1);
print_r($xml1);
print_r($simplexml1);

// /params/param/value/array/data
// there is a tag "data" for each element
// "data" doesn't contain the tag "name"
$xml2 = xmlrpc_encode(array('a','b'));
$simplexml2 = simplexml_load_string($xml2);
print_r($xml2);
print_r($simplexml2);
?>

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;)