另一个选择是SimpleXML扩展(我相信它是大多数php安装的标配)。

http://php.net/manual/en/book.simplexml.php

在您的示例中，语法看起来像这样

$xml = new SimpleXMLElement($xmlString);
echo $xml->bbb->cccc->dddd['Id'];
echo $xml->bbb->cccc->eeee['name'];
// or...........
foreach ($xml->bbb->cccc as $element) {
foreach($element as $key => $val) {
echo "{$key}: {$val}";
}
}

将XML字符串($buffer)转换为一个简化的数组，忽略属性并将具有相同名称的子元素分组:

function XML2Array(SimpleXMLElement $parent)
{
$array = array();


foreach ($parent as $name => $element) {
($node = & $array[$name])
&& (1 === count($node) ? $node = array($node) : 1)
&& $node = & $node[];


$node = $element->count() ? XML2Array($element) : trim($element);
}


return $array;
}


$xml   = simplexml_load_string($buffer);
$array = XML2Array($xml);
$array = array($xml->getName() => $array);

结果:

Array
(
[aaaa] => Array
(
[bbb] => Array
(
[cccc] => Array
(
[dddd] =>
[eeee] =>
)


)


)


)

如果您还想拥有这些属性，可以通过SimpleXMLElement的JSON编码/解码使用它们。这通常是最简单快捷的解决方法:

$xml   = simplexml_load_string($buffer);
$array = json_decode(json_encode((array) $xml), true);
$array = array($xml->getName() => $array);

结果:

Array
(
[aaaa] => Array
(
[@attributes] => Array
(
[Version] => 1.0
)


[bbb] => Array
(
[cccc] => Array
(
[dddd] => Array
(
[@attributes] => Array
(
[Id] => id:pass
)


)


[eeee] => Array
(
[@attributes] => Array
(
[name] => hearaman
[age] => 24
)


)


)


)


)


)

请注意，所有这些方法都只能在XML文档的名称空间中工作。

简单!

$xml = simplexml_load_string($xmlstring, "SimpleXMLElement", LIBXML_NOCDATA);
$json = json_encode($xml);
$array = json_decode($json,TRUE);

$array = json_decode(json_encode((array)simplexml_load_string($xml)),true);

我喜欢这个问题，一些答案对我很有帮助，但我需要将xml转换为一个支配数组，所以我将发布我的解决方案，也许以后有人需要它:

<?php
$xml = json_decode(json_encode((array)simplexml_load_string($xml)),1);
$finalItem = getChild($xml);
var_dump($finalItem);


function getChild($xml, $finalItem = []){
foreach($xml as $key=>$value){
if(!is_array($value)){
$finalItem[$key] = $value;
}else{
$finalItem = getChild($value, $finalItem);
}
}
return $finalItem;
}
?>

看到https://github.com/gaarf/XML-string-to-PHP-array/blob/master/xmlstr_to_array.php

<?php
/**
* convert xml string to php array - useful to get a serializable value
*
* @param string $xmlstr
* @return array
*
* @author Adrien aka Gaarf & contributors
* @see http://gaarf.info/2009/08/13/xml-string-to-php-array/
*/
function xmlstr_to_array($xmlstr) {
$doc = new DOMDocument();
$doc->loadXML($xmlstr);
$root = $doc->documentElement;
$output = domnode_to_array($root);
$output['@root'] = $root->tagName;
return $output;
}
function domnode_to_array($node) {
$output = array();
switch ($node->nodeType) {
case XML_CDATA_SECTION_NODE:
case XML_TEXT_NODE:
$output = trim($node->textContent);
break;
case XML_ELEMENT_NODE:
for ($i=0, $m=$node->childNodes->length; $i<$m; $i++) {
$child = $node->childNodes->item($i);
$v = domnode_to_array($child);
if(isset($child->tagName)) {
$t = $child->tagName;
if(!isset($output[$t])) {
$output[$t] = array();
}
$output[$t][] = $v;
}
elseif($v || $v === '0') {
$output = (string) $v;
}
}
if($node->attributes->length && !is_array($output)) { //Has attributes but isn't an array
$output = array('@content'=>$output); //Change output into an array.
}
if(is_array($output)) {
if($node->attributes->length) {
$a = array();
foreach($node->attributes as $attrName => $attrNode) {
$a[$attrName] = (string) $attrNode->value;
}
$output['@attributes'] = $a;
}
foreach ($output as $t => $v) {
if(is_array($v) && count($v)==1 && $t!='@attributes') {
$output[$t] = $v[0];
}
}
}
break;
}
return $output;
}

奇怪的是没有人提到xml_parse_into_struct:

$simple = "<para><note>simple note</note></para>";
$p = xml_parser_create();
xml_parse_into_struct($p, $simple, $vals, $index);
xml_parser_free($p);
echo "Index array\n";
print_r($index);
echo "\nVals array\n";
print_r($vals);

XML到数组

更多详细信息访问https://github.com/sapankumarmohanty/lamp/blob/master/Crate-XML-2-Array

//将XML转换为数组，将SOAP XML转换为数组

function xml2array($contents, $get_attributes = 1, $priority = 'tag')
{
if (!$contents) return array();
if (!function_exists('xml_parser_create')) {
// print "'xml_parser_create()' function not found!";
return array();
}
// Get the XML parser of PHP - PHP must have this module for the parser to work
$parser = xml_parser_create('');
xml_parser_set_option($parser, XML_OPTION_TARGET_ENCODING, "UTF-8"); // http://minutillo.com/steve/weblog/2004/6/17/php-xml-and-character-encodings-a-tale-of-sadness-rage-and-data-loss
xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, 0);
xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
xml_parse_into_struct($parser, trim($contents) , $xml_values);
xml_parser_free($parser);
if (!$xml_values) return; //Hmm...
// Initializations
$xml_array = array();
$parents = array();
$opened_tags = array();
$arr = array();
$current = & $xml_array; //Refference
// Go through the tags.
$repeated_tag_index = array(); //Multiple tags with same name will be turned into an array
foreach($xml_values as $data) {
unset($attributes, $value); //Remove existing values, or there will be trouble
// This command will extract these variables into the foreach scope
// tag(string), type(string), level(int), attributes(array).
extract($data); //We could use the array by itself, but this cooler.
$result = array();
$attributes_data = array();
if (isset($value)) {
if ($priority == 'tag') $result = $value;
else $result['value'] = $value; //Put the value in a assoc array if we are in the 'Attribute' mode
}
// Set the attributes too.
if (isset($attributes) and $get_attributes) {
foreach($attributes as $attr => $val) {
if ( $attr == 'ResStatus' ) {
$current[$attr][] = $val;
}
if ($priority == 'tag') $attributes_data[$attr] = $val;
else $result['attr'][$attr] = $val; //Set all the attributes in a array called 'attr'
}
}
// See tag status and do the needed.
//echo"<br/> Type:".$type;
if ($type == "open") { //The starting of the tag '<tag>'
$parent[$level - 1] = & $current;
if (!is_array($current) or (!in_array($tag, array_keys($current)))) { //Insert New tag
$current[$tag] = $result;
if ($attributes_data) $current[$tag . '_attr'] = $attributes_data;
//print_r($current[$tag . '_attr']);
$repeated_tag_index[$tag . '_' . $level] = 1;
$current = & $current[$tag];
}
else { //There was another element with the same tag name
if (isset($current[$tag][0])) { //If there is a 0th element it is already an array
$current[$tag][$repeated_tag_index[$tag . '_' . $level]] = $result;
$repeated_tag_index[$tag . '_' . $level]++;
}
else { //This section will make the value an array if multiple tags with the same name appear together
$current[$tag] = array(
$current[$tag],
$result
); //This will combine the existing item and the new item together to make an array
$repeated_tag_index[$tag . '_' . $level] = 2;
if (isset($current[$tag . '_attr'])) { //The attribute of the last(0th) tag must be moved as well
$current[$tag]['0_attr'] = $current[$tag . '_attr'];
unset($current[$tag . '_attr']);
}
}
$last_item_index = $repeated_tag_index[$tag . '_' . $level] - 1;
$current = & $current[$tag][$last_item_index];
}
}
elseif ($type == "complete") { //Tags that ends in 1 line '<tag />'
// See if the key is already taken.
if (!isset($current[$tag])) { //New Key
$current[$tag] = $result;
$repeated_tag_index[$tag . '_' . $level] = 1;
if ($priority == 'tag' and $attributes_data) $current[$tag . '_attr'] = $attributes_data;
}
else { //If taken, put all things inside a list(array)
if (isset($current[$tag][0]) and is_array($current[$tag])) { //If it is already an array...
// ...push the new element into that array.
$current[$tag][$repeated_tag_index[$tag . '_' . $level]] = $result;
if ($priority == 'tag' and $get_attributes and $attributes_data) {
$current[$tag][$repeated_tag_index[$tag . '_' . $level] . '_attr'] = $attributes_data;
}
$repeated_tag_index[$tag . '_' . $level]++;
}
else { //If it is not an array...
$current[$tag] = array(
$current[$tag],
$result
); //...Make it an array using using the existing value and the new value
$repeated_tag_index[$tag . '_' . $level] = 1;
if ($priority == 'tag' and $get_attributes) {
if (isset($current[$tag . '_attr'])) { //The attribute of the last(0th) tag must be moved as well
$current[$tag]['0_attr'] = $current[$tag . '_attr'];
unset($current[$tag . '_attr']);
}
if ($attributes_data) {
$current[$tag][$repeated_tag_index[$tag . '_' . $level] . '_attr'] = $attributes_data;
}
}
$repeated_tag_index[$tag . '_' . $level]++; //0 and 1 index is already taken
}
}
}
elseif ($type == 'close') { //End of tag '</tag>'
$current = & $parent[$level - 1];
}
}
return ($xml_array);
}
    

// Let's call the this above function xml2array
    

xml2array($xmlContent, $get_attributes = 3, $priority = 'tag'); // it will work 100% if not ping me @skype: sapan.mohannty
    

//  Enjoy coding

当遇到只有文本节点的子元素时，在接受的答案拖放属性中使用的方法。例如:

$xml = '<container><element attribute="123">abcd</element></container>';
print_r(json_decode(json_encode(simplexml_load_string($xml, "SimpleXMLElement", LIBXML_NOCDATA)),1));


Array
(
[element] => abcd
)

我的解决方案(我希望我能在这里给予赞扬，因为我确信这是从某些东西改编而来的):

function XMLtoArray($xml) {
$previous_value = libxml_use_internal_errors(true);
$dom = new DOMDocument('1.0', 'UTF-8');
$dom->preserveWhiteSpace = false;
$dom->loadXml($xml);
libxml_use_internal_errors($previous_value);
if (libxml_get_errors()) {
return [];
}
return DOMtoArray($dom);
}


function DOMtoArray($root) {
$result = array();


if ($root->hasAttributes()) {
$attrs = $root->attributes;
foreach ($attrs as $attr) {
$result['@attributes'][$attr->name] = $attr->value;
}
}


if ($root->hasChildNodes()) {
$children = $root->childNodes;
if ($children->length == 1) {
$child = $children->item(0);
if (in_array($child->nodeType,[XML_TEXT_NODE,XML_CDATA_SECTION_NODE])) {
$result['_value'] = $child->nodeValue;
return count($result) == 1
? $result['_value']
: $result;
}


}
$groups = array();
foreach ($children as $child) {
if (!isset($result[$child->nodeName])) {
$result[$child->nodeName] = DOMtoArray($child);
} else {
if (!isset($groups[$child->nodeName])) {
$result[$child->nodeName] = array($result[$child->nodeName]);
$groups[$child->nodeName] = 1;
}
$result[$child->nodeName][] = DOMtoArray($child);
}
}
}
return $result;
}


$xml = '
<aaaa Version="1.0">
<bbb>
<cccc>
<dddd id="123" />
<eeee name="john" age="24" />
<ffff type="employee">Supervisor</ffff>
</cccc>
</bbb>
</aaaa>
';
print_r(XMLtoArray($xml));


Array
(
[aaaa] => Array
(
[@attributes] => Array
(
[Version] => 1.0
)


[bbb] => Array
(
[cccc] => Array
(
[dddd] => Array
(
[@attributes] => Array
(
[id] => 123
)


)


[eeee] => Array
(
[@attributes] => Array
(
[name] => john
[age] => 24
)


)


[ffff] => Array
(
[@attributes] => Array
(
[type] => employee
)


[_value] => Supervisor
)


)


)


)


)

两行代码(https://www.php.net/manual/en/book.simplexml.php#113485)

$xml = new SimpleXMLElement("<your><xml><string>ok</string></xml></your>");
$array = (array)$xml;

我知道我迟到了10亿年，但我和你有同样的问题，需要一个更复杂的解决方案，所以这里有一个函数(xml_decode())，我把SimpleXMLElements转换成PHP数组，而不丢失属性，并带有参数，以供更可定制的使用。

val()函数是为了让你自定义如何处理元素值——例如，如果你想将<elem>true</elem>转换为true而不是"true"。

免责声明:我知道只使用PHP SimpleXML扩展更容易，但我需要将大量XML文件转换为JSON文件，以便在我的一个项目中进行重大更改。此外，这个问题是关于如何将XML转换为PHP数组，而不是如何在PHP中使用XML。

<?php


function val($input) {
return strval($input);
}


/**
* Transform an SimpleXMLElement into an associative array.
*
* @param SimpleXMLElement $xml The XML element to be decoded.
*
* @param bool $attributes_key If the element attributes should be grouped into a single element.
*
* Example: <elem foo="true" bar="false" />
*
* If true, xml_decode() will output
* array("attributes" => array("foo" => "true", "bar" => "false"))
*
* If false, xml_decode() will output
* array("foo" => "true", "bar" => "false")
*
* @param bool $reduce If unecessary keys created due to XML structure should be eliminated.
*
* Example: <fruits><fruit>apple</fruit><fruit>banana</fruit></fruits>
*
* If true, xml_decode() will output the element as
* array("fruits" => array(0 => "apple", 1 => "banana"))
*
* If false, xml_decode() will output the element as
* array("fruits" => array("fruit" => array(0 => "apple", 1 => "banana")))
*
* @param array $always_array List of which childs should be treated aways as an array.
*
* Example: <fruits><fruit>apple</fruit></fruits>
*
* If array("fruit") is passed as $aways_array, xml_decode() will output the element as
* array("fruits" => array("fruit" => array(0 => "apple")))
*
* If not, xml_decode() will output the element as
* array("fruits" => array("fruit" => "apple"))
*
* @param array $value_keys List of custom element's value names. This argument is only
* used when values need to passed as elements because of attributes or other reasons.
*
* The default value key name is "value".
*
* Example: <fruits><fruit id="123">apple</fruit></fruits>
*
* If array("fruit" => "name) is passed as $value_keys, xml_decode() will output the element as
* array("fruits" => array("fruit" => array("attributes" => array("id" => "123"), "name" => "apple")))
*
* If not, xml_decode() will output the element as
* array("fruits" => array("fruit" => array("attributes" => array("id" => "123"), "value" => "apple")))
*/
function xml_decode(SimpleXMLElement $xml, bool $attributes_key = true, bool $reduce = true,
array $always_array = array(), array $value_keys = array()): string|array {


// Inicialize the array.
$arr = array();


// XML tag name.
$xml_name = $xml->getName();


// Turn attributes into elements.
foreach ($xml->attributes() as $key => $value) {
// Use a key for attributes if $attributes_key argument is true.
if ($attributes_key) {
$arr['attributes'][val($key)] = val($value);
} else {
$arr[val($key)] = val($value);
}
}


// Count children.
$children_count = $xml->children()->count();


// No children? Value will be text.
if ($children_count == 0) {


// If attributes were found and turned into elements
// the value shall be an element.
if (count($arr) > 0) {
// If attributes were found previosly.
$key = $value_keys[$xml_name] ?? $value_keys['*'] ?? "value";
$arr[$key] = val($xml);
// Else, no need for an array.
} else {
$arr = val($xml);
}


// Children? Loop continues.
} else {


// Defines if there are unecessary array keys - due to the XML structure - to be cut.
// Example: <fruits><fruit /><fruit /><fruits />
// could be turned into arr['fruits'][0] and arr['fruits'][1] instead of
// arr['fruits']['fruit'][0] and arr['fruits']['fruit'][1] for a
// cleaner organization.
$children_names = array();
foreach ($xml->children() as $child) {
$child_name = $child->getName();
in_array($child_name, $children_names) or $children_names[] = $child_name;
}
$reducible = empty($arr) && count($children_names) === 1;


foreach ($xml->children() as $child) {


// Child's name shall be the element key.
$name = $child->getName();
            

// Children with the same name will be turned into a list.
// Example: $arr['repeating-child'][...] = $value;
if ($xml->$name->count() > 1 || in_array($name, $always_array)) {


// Reduction, if possible and requested by the $reduce argument.
if ($reduce && $reducible) {
$arr[] = xml_decode($child, $attributes_key, $reduce, $always_array, $value_keys);
} else {
$arr[$name][] = xml_decode($child, $attributes_key, $reduce, $always_array, $value_keys);
}


// Normal children will be normally decoded.
// Example: $arr['no-repeating-child] = $value;
} else {
                

$arr[$name] = xml_decode($child, $attributes_key, $reduce, $always_array, $value_keys);


}
}
}


return $arr;


}

恢复所有文档和注释，函数将属性和元素值转换为简单的数组元素，并使用自身的循环来处理包含子元素的元素。

这些参数允许你:

• 将属性分组为单独的键;
• 删除由于XML结构转换而产生的不必要的键(例如:fruits->fruit到$arr['fruits']['fruit'][n]);
• 设置应该被视为列表的元素(因为有时它只有一个子元素，但你仍然需要它是一个列表);
• 为数组元素键设置一个名称，它将表示XML元素文本值——当属性转换为数组元素时将需要这个值。

XML元素的使用示例(我认为你在11年后已经解决了这个问题，但我正在回答这个问题，所以……):

test.xml

<test>
<aaaa Version="1.0">
<bbb>
<cccc>
<dddd Id="id:pass" />
<eeee name="hearaman" age="24" />
</cccc>
</bbb>
</aaaa>
</test>

PHP

$xml = simplexml_load_file("test.xml");
$decode = xml_decode($xml);
echo "<pre>" . print_r($decode,true) . "</pre>";

输出

Array
(
[aaaa] => Array
(
[attributes] => Array
(
[Version] => 1.0
)


[bbb] => Array
(
[cccc] => Array
(
[dddd] => Array
(
[attributes] => Array
(
[Id] => id:pass
)


[value] =>
)


[eeee] => Array
(
[attributes] => Array
(
[name] => hearaman
[age] => 24
)


[value] =>
)


)


)


)


)