我有这种方法将XML字符串转换为具有不同键和值的PHP数组，以便充分理解该XML。但是，当有多个相同类型的子节点时，我没有从数组中获得所需的结果，我对如何改变方法感到困惑。
这就是方法的样子：
/**
* Converts a XML string to an array
*
* @param $xmlString
* @return array
*/
private function parseXml($xmlString)
{
$doc = new DOMDocument;
$doc->loadXML($xmlString);
$root = $doc->documentElement;
$output[$root->tagName] = $this->domnodeToArray($root, $doc);
return $output;
}
/**
* @param $node
* @param $xmlDocument
* @return array|string
*/
private function domNodeToArray($node, $xmlDocument)
{
$output = [];
switch ($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 = $this->domNodeToArray($child, $xmlDocument);
if (isset($child->tagName))
{
$t = $child->tagName;
if (!isset($output['value'][$t]))
{
$output['value'][$t] = [];
}
$output['value'][$t][] = $v;
}
else if ($v || $v === '0')
{
$output['value'] = htmlspecialchars((string)$v, ENT_XML1 | ENT_COMPAT, 'UTF-8');
}
}
if (isset($output['value']) && $node->attributes->length && !is_array($output['value']))
{
$output = ['value' => $output['value']];
}
if (!$node->attributes->length && isset($output['value']) && !is_array($output['value']))
{
$output = ['attributes' => [], 'value' => $output['value']];
}
if ($node->attributes->length)
{
$a = [];
foreach ($node->attributes as $attrName => $attrNode)
{
$a[$attrName] = (string)$attrNode->value;
}
$output['attributes'] = $a;
}
else
{
$output['attributes'] = [];
}
if (isset($output['value']) && is_array($output['value']))
{
foreach ($output['value'] as $t => $v)
{
if (is_array($v) && count($v) == 1 && $t != 'attributes')
{
$output['value'][$t] = $v[0];
}
}
}
break;
}
return $output;
}
以下是一些示例XML：
<?xml version="1.0" encoding="UTF-8"?>
<characters>
<character>
<name2>Sno</name2>
<friend-of>Pep</friend-of>
<since>1950-10-04</since>
<qualification>extroverted beagle</qualification>
</character>
<character>
<name2>Pep</name2>
<friend-of>Sno</friend-of>
<since>1966-08-22</since>
<qualification>bold, brash and tomboyish</qualification>
</character>
</characters>
运行该方法并将该XML作为其参数传递将产生此数组：
array:1 [▼
"characters" => array:2 [▼
"value" => array:1 [▼
"character" => array:2 [▼
0 => array:2 [▼
"value" => array:4 [▼
"name2" => array:2 [▼
"attributes" => []
"value" => "Sno"
]
"friend-of" => array:2 [▼
"attributes" => []
"value" => "Pep"
]
"since" => array:2 [▼
"attributes" => []
"value" => "1950-10-04"
]
"qualification" => array:2 [▼
"attributes" => []
"value" => "extroverted beagle"
]
]
"attributes" => []
]
1 => array:2 [▼
"value" => array:4 [▼
"name2" => array:2 [▼
"attributes" => []
"value" => "Pep"
]
"friend-of" => array:2 [▼
"attributes" => []
"value" => "Sno"
]
"since" => array:2 [▼
"attributes" => []
"value" => "1966-08-22"
]
"qualification" => array:2 [▼
"attributes" => []
"value" => "bold, brash and tomboyish"
]
]
"attributes" => []
]
]
]
"attributes" => []
]
]
我想要的结果是（缩进可能是错误的）：
array:1 [▼
"characters" => array:2 [▼
"value" => array:2 [▼
0 => [
"character" => array:1 [▼
"value" => array:4 [▼
"name2" => array:2 [▼
"attributes" => []
"value" => "Sno"
]
"friend-of" => array:2 [▼
"attributes" => []
"value" => "Pep"
]
"since" => array:2 [▼
"attributes" => []
"value" => "1950-10-04"
]
"qualification" => array:2 [▼
"attributes" => []
"value" => "extroverted beagle"
]
]
"attributes" => []
]
]
]
1 => array:2 [▼
"character" => array:1 [▼
"value" => array:4 [▼
"name2" => array:2 [▼
"attributes" => []
"value" => "Pep"
]
"friend-of" => array:2 [▼
"attributes" => []
"value" => "Sno"
]
"since" => array:2 [▼
"attributes" => []
"value" => "1966-08-22"
]
"qualification" => array:2 [▼
"attributes" => []
"value" => "bold, brash and tomboyish"
]
]
"attributes" => []
]
]
]
]
"attributes" => []
]
]
基本上，我希望characters键的value键是两个项目的数组，基本上包括2个character键。只有在同一分支上有许多相同的元素时才会发生这种情况。目前的方式，character键是一个包含2个元素的数组，在我的情况下不起作用。
改变上述方法以反映我的需求对我来说还不可能，我不确定我应采取什么样的方法。从DOMDocument实例改变这样的数组似乎相当复杂。
答案 0 :(得分：1)
我已对您的功能进行了一些更改，但我不确定这是否是您所需要的。
private function domNodeToArray($node, $xmlDocument)
{
$output = ['value' => [], 'attributes' => []];
switch ($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 = $this->domNodeToArray($child, $xmlDocument);
if (isset($child->tagName)) {
$t = $child->tagName;
if (isset($output['value'][$t])) {
$output['value'][] = [$t => $output['value'][$t]];
$output['value'][] = [$t => $v];
unset($output['value'][$t]);
} else {
$output['value'][$t] = $v;
}
} elseif (($v && is_string($v)) || $v === '0') {
$output['value'] = htmlspecialchars((string)$v, ENT_XML1 | ENT_COMPAT, 'UTF-8');
}
}
if ($node->attributes->length) {
foreach ($node->attributes as $attrName => $attrNode) {
$output['attributes'][$attrName] = (string) $attrNode->value;
}
}
break;
}
return $output;
}
array:1 [▼
"characters" => array:2 [▼
"value" => array:2 [▼
0 => array:1 [▼
"character" => array:2 [▼
"value" => array:4 [▼
"name2" => array:2 [▼
"value" => "Sno"
"attributes" => []
]
"friend-of" => array:2 [▼
"value" => "Pep"
"attributes" => []
]
"since" => array:2 [▼
"value" => "1950-10-04"
"attributes" => []
]
"qualification" => array:2 [▼
"value" => "extroverted beagle"
"attributes" => []
]
]
"attributes" => []
]
]
1 => array:1 [▼
"character" => array:2 [▼
"value" => array:4 [▼
"name2" => array:2 [▼
"value" => "Pep"
"attributes" => []
]
"friend-of" => array:2 [▼
"value" => "Sno"
"attributes" => []
]
"since" => array:2 [▼
"value" => "1966-08-22"
"attributes" => []
]
"qualification" => array:2 [▼
"value" => "bold, brash and tomboyish"
"attributes" => []
]
]
"attributes" => []
]
]
]
"attributes" => []
]
]
答案 1 :(得分：1)
问题是何时添加新级别以及何时继续添加数据。我已经改变了这个逻辑，在代码中添加了注释，以帮助理解发生了什么以及什么时候......
private function domNodeToArray($node, $xmlDocument)
{
$output = [];
switch ($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 = $this->domNodeToArray($child, $xmlDocument);
if (isset($child->tagName))
{
$t = $child->tagName;
// if (!isset($output['value'][$t]))
// {
// $output['value'][$t] = [];
// }
// If the element already exists
if (isset($output['value'][$t]))
{
// Copy the existing value to new level
$output['value'][] = [$t => $output['value'][$t]];
// Add in new value
$output['value'][] = [$t => $v];
// Remove old element
unset($output['value'][$t]);
}
// If this has already been added at a new level
elseif ( isset($output['value'][0][$t]))
{
// Add it to existing extra level
$output['value'][] = [$t => $v];
}
else {
$output['value'][$t] = $v;
}
}
else if ($v || $v === '0')
{
$output['value'] = htmlspecialchars((string)$v, ENT_XML1 | ENT_COMPAT, 'UTF-8');
}
}
if (isset($output['value']) && $node->attributes->length && !is_array($output['value']))
{
$output = ['value' => $output['value']];
}
if (!$node->attributes->length && isset($output['value']) && !is_array($output['value']))
{
$output = ['attributes' => [], 'value' => $output['value']];
}
if ($node->attributes->length)
{
$a = [];
foreach ($node->attributes as $attrName => $attrNode)
{
$a[$attrName] = (string)$attrNode->value;
}
$output['attributes'] = $a;
}
else
{
$output['attributes'] = [];
}
break;
}
return $output;
}
我已经尝试过了......
<?xml version="1.0" encoding="UTF-8"?>
<characters>
<character>
<name2>Sno</name2>
<friend-of>Pep</friend-of>
<since>1950-10-04</since>
<qualification>extroverted beagle</qualification>
</character>
<character>
<name2>Pep</name2>
<friend-of>Sno</friend-of>
<since>1966-08-22</since>
<qualification>bold, brash and tomboyish</qualification>
</character>
<character>
<name2>Pep2</name2>
<friend-of>Sno</friend-of>
<since>1966-08-23</since>
<qualification>boldish, brashish and tomboyish</qualification>
</character>
</characters>
检查<character>元素是否全部添加到正确的级别。