我有一個 xml 文檔如下：<?xml version="1.0" encoding="UTF-8" ?><books> <book> <name>Title One</name> <year>2014</year> <authors> <author> <name>Author One</name> </author> </authors> </book> <book serie="yes"> <name>Title Two</name> <year>2015</year> <authors> <author> <name>Author two</name> </author> <author> <name>Author three</name> </author> </authors> </book> <book serie="no"> <name>Title Three</name> <year>2015</year> <authors> <author> <name>Author four</name> </author> </authors> </book></books>我想將它轉換成下面的數組。array( array('Tittle one', 2014, 'Author One'), array('Tittle two', 2015, 'Author two, Author three'), array('Tittle three', 2015, 'Author four'),);我下面的代碼無法生成我想要的數組結構：function arrayRepresentation(){ $xmldoc = new DOMDocument(); $xmldoc->load("data/data.xml"); $parentArray = array(); foreach ($xmldoc->getElementsByTagName('book') as $item) { $parentArray[] = array_generate($item); } var_dump($parentArray);}function array_generate($item){ $movieArray = array(); $childMovieArray = array(); for ($i = 0; $i < $item->childNodes->length; ++$i) { $child = $item->childNodes->item($i); if ($child->nodeType == XML_ELEMENT_NODE) { if(hasChild($child)){ $childMovieArray = array_generate($child); } } $movieArray[] = trim($child->nodeValue); } if(!empty($childMovieArray)){ $movieArray = array_merge($movieArray,$childMovieArray); } return $movieArray;}基本上我循環遍歷節點來獲取 xml 元素值。然后我檢查我的節點是否有更多的子節點，如果有，我再次循環它以獲取值。我無法推斷出一種方法：（i）不會給我一些空數組元素（ii）檢查任何子節點并將所有 xml 同級元素放入單個字符串中
1 回答
慕碼人2483693
TA貢獻1860條經驗 獲得超9個贊
PHP DOM 支持 Xpath 表達式來獲取特定節點和值。這大大減少了您需要的循環和條件的數量。
這是一個演示：
// bootstrap the XML document
$document = new DOMDocument();
$document->loadXML($xml);
$xpath = new DOMXpath($document);
$data = [];
// iterate the node element nodes
foreach ($xpath->evaluate('/books/book') as $book) {
$authors = array_map(
fn ($node) => $node->textContent,
// fetch author name nodes as an array
iterator_to_array($xpath->evaluate('authors/author/name', $book))
);
$data[] = [
// cast first name element child to string
$xpath->evaluate('string(name)', $book),
// cast first year element child to string
$xpath->evaluate('string(year)', $book),
implode(', ', $authors)
];
}
var_dump($data);
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