我只需要回显ID和标题,我已经使用Xpath和xml来获取详细信息......我需要在单独的行中回显每个ID和标题......
<?php
$xml = <<< XML
<data>
<metadata>
<total_elements>183</total_elements>
<elements_per_page>100</elements_per_page>
<total_pages>2</total_pages>
</metadata>
<spl>
<id>ID1</id>
<version>2</version>
<title>Title 1</title>
<published_date>Oct 06, 2017</published_date>
</spl>
<spl>
<id>ID2</id>
<version>2</version>
<title>Title 2</title>
<published_date>Oct 05, 2017</published_date>
</spl>
<spl>
<id>ID3</id>
<version>2</version>
<title>Title 3</title>
<published_date>Oct 04, 2017</published_date>
</spl>
</data>
XML;
$errorSetting = libxml_use_internal_errors(TRUE);
$feed = new DOMDocument();
$feed->loadXML($xml);
libxml_clear_errors();
libxml_use_internal_errors($errorSetting);
$xpath = new DOMXPath($feed);
foreach ($xpath->query('//spl') as $spl) {
foreach ($spl->childNodes as $child)
{
if (($child->nodeValue) !== '')
{
echo \htmlspecialchars($child->nodeValue);
}
}
}
?>
这给出了输出:
ID1
2
Title 1
Oct 06, 2017
ID2
2
Title 2
Oct 05, 2017
ID3
2
Title 3
Oct 04, 2017
或者我尝试过:
foreach ($xpath->query('//id') as $id)
{
if (($id->nodeValue) !== '') {
echo \htmlspecialchars($id->nodeValue);
}
foreach ($xpath->query('//title') as $title) {
echo \htmlspecialchars($title->nodeValue);
}
}
但它将输出视为:
ID1 Title 1 Title 2 Title 3
ID2 Title 1 Title 2 Title 3
ID3 Title 1 Title 2 Title 3
我需要输出为:
ID1 Title 1
ID2 Title 2
ID3 Title 3
答案 0 :(得分:2)
如果您将foreach循环更改为
foreach ($xpath->query('//spl') as $spl) {
echo $xpath->evaluate("string(descendant::id/text())", $spl);
echo $xpath->evaluate("string(descendant::title/text())", $spl);
echo PHP_EOL;
}
这循环遍历所有spl元素,然后是内部XPath,获取id和title(后代确保它只是封闭元素中的项)。使用evaluate()
意味着在这种情况下,返回的值不是提取节点,而是字符串。同样在evaluate()
我使用$spl
作为查询的起点。