我有这个XML：
<eSummaryResult>
<DocSum>
<Id>11482001</Id>
<Item Name="PubDate" Type="Date">2001 Jun</Item>
<Item Name="EPubDate" Type="Date" />
<Item Name="Source" Type="String">Adverse Drug React Toxicol Rev</Item>
<Item Name="AuthorList" Type="List">
<Item Name="Author" Type="String">Mantle D</Item>
<Item Name="Author" Type="String">Gok MA</Item>
<Item Name="Author" Type="String">Lennard TW</Item>
</Item>
<Item Name="LastAuthor" Type="String">Lennard TW</Item>
<Item Name="Title" Type="String">Adverse and beneficial effects of plant extracts on skin and skin disorders.</Item>
<Item Name="Volume" Type="String">20</Item>
<Item Name="Issue" Type="String">2</Item>
<Item Name="Pages" Type="String">89-103</Item>
<Item Name="LangList" Type="List">
<Item Name="Lang" Type="String">English</Item>
</Item>
<Item Name="NlmUniqueID" Type="String">9109474</Item>
<Item Name="ISSN" Type="String">0964-198X</Item>
<Item Name="ESSN" Type="String" />
<Item Name="PubTypeList" Type="List">
<Item Name="PubType" Type="String">Journal Article</Item>
<Item Name="PubType" Type="String">Review</Item>
</Item>
<Item Name="RecordStatus" Type="String">PubMed - indexed for MEDLINE</Item>
<Item Name="PubStatus" Type="String">ppublish</Item>
<Item Name="ArticleIds" Type="List">
<Item Name="pubmed" Type="String">11482001</Item>
<Item Name="eid" Type="String">11482001</Item>
<Item Name="rid" Type="String">11482001</Item>
</Item>
<Item Name="History" Type="List">
<Item Name="pubmed" Type="Date">2001/08/03 10:00</Item>
<Item Name="medline" Type="Date">2002/01/23 10:01</Item>
<Item Name="entrez" Type="Date">2001/08/03 10:00</Item>
</Item>
<Item Name="References" Type="List" />
<Item Name="HasAbstract" Type="Integer">1</Item>
<Item Name="PmcRefCount" Type="Integer">3</Item>
<Item Name="FullJournalName" Type="String">Adverse drug reactions and toxicological reviews</Item>
<Item Name="ELocationID" Type="String" />
<Item Name="SO" Type="String">2001 Jun;20(2):89-103</Item>
</DocSum>
</eSummaryResult>
我想创建一个这样的数组：
$results2 = array(
'0' => array(
'id' => 'xxxxxxxx',
'authors' => array(
'0' => 'xxxxxxxxxx',
'1' => 'xxxxxxxxxx',
)
),
'1' => array(
'id' => 'xxxxxxxx',
'authors' => array(
'0' => 'xxxxxxxxxx',
'1' => 'xxxxxxxxxx',
)
),
);
必须执行此功能以将数据从XML获取到PHP，我尝试在其中放置具有此结构的数据，然后显示。我对PHP没有太多经验，我在语法方面遇到了问题。这是函数：
function esummary_query($db, $id) {
$context = stream_context_create(array(
'http'=>array(
'user_agent' => 'Mozilla/5.0 (Windows NT 5.1) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11'
)
));
$xml = file_get_contents('http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esummary.fcgi?db=' . $db . '&id=' . $id, FALSE, $context);
$xml_file = simplexml_load_string($xml);
$results2 = array();
foreach ( $xml_file->DocSum as $items ) {
$results2[]['id'] = $items->Id;
$authors = $xml_file->xpath("//Item[@Name='Author']");
foreach ($authors as $author) {
$results2[]['authors'][] = $author;
}
}
return $results2;
}
echo'<h3>id:</h3>' . $results2[0]['id'] . "<br> author:" . $results2[0]['authors'];
但是当我显示它时，会显示 id，但作者的姓名不会。 print_r显示：
Array ( [0] => Array ( [id] => SimpleXMLElement Object ( [0] => 11850928 ) ) [1] => Array ( [authors] => Array ( [0] => SimpleXMLElement Object ( [@attributes] => Array ( [Name] => Author [Type] => String ) [0] => LoPresti PJ ) ) ) [2] => Array ( [authors] => Array ( [0] => SimpleXMLElement Object ( [@attributes] => Array ( [Name] => Author [Type] => String ) [0] => Hambrick GW Jr ) ) ) )
谢谢大家！
添加计数器并将其用作数组键
function esummary_query($db, $id) {
$context = stream_context_create(array(
'http'=>array(
'user_agent' => 'Mozilla/5.0 (Windows NT 5.1) AppleWebKit/536.11 (KHTML, like Gecko) Chrome/20.0.1132.57 Safari/536.11'
)
));
$xml = file_get_contents('http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esummary.fcgi?db=' . $db . '&id=' . $id, FALSE, $context);
$xml_file = simplexml_load_string($xml);
$results2 = array();
$c=0;
foreach ( $xml_file->DocSum as $items ) {
$results2[$c]['id'] = (string)$items->Id;
$authors = $xml_file->xpath("//Item[@Name='Author']");
foreach ($authors as $author) {
$results2[$c]['authors'][] = (string)$author;
}
$c++;
}
return $results2;
}
示例输出
Array
(
[0] => Array
(
[id] => 11482001
[authors] => Array
(
[0] => Mantle D
[1] => Gok MA
[2] => Lennard TW
[3] => Mantle D
[4] => Gok MA
[5] => Lennard TW
)
)
[1] => Array
(
[id] => 11482001
[authors] => Array
(
[0] => Mantle D
[1] => Gok MA
[2] => Lennard TW
[3] => Mantle D
[4] => Gok MA
[5] => Lennard TW
)
)
)
你也可以尝试使用DOMDocument，有一个更陡峭的学习曲线，但一旦你掌握了它的窍门，它就会提供比SimpleXML更大的灵活性。
$result = array();
// pretty output if it's needed
$xml = new DOMDocument('1.0', 'utf-8');
$xml->preserveWhiteSpace = false;
$xml->formatOutput = true;
$source = file_get_contents('http://eutils.ncbi.nlm.nih.gov/entrez/eutils/esummary.fcgi?db=' . $db . '&id=' . $id, FALSE, $context);
$xml->loadXML($source);
// xpath to use later
$xpath = new DOMXPath($xml);
// get all the nodes that we want to extract data from
$nodes = $xml->getElementsByTagName('DocSum');
foreach ($nodes as $node)
{
// extract the ID
$idNode = $node->getElementsByTagName('Id');
$id = $idNode->item(0)->nodeValue;
// extract the authors, we need to use xpath
$query = '//Item[@Name="AuthorList"]/Item[@Name="Author"]';
$authorNodes = $xpath->query($query, $node);
$authors = array();
foreach ($authorNodes as $authorNode)
{
$authors[] = $authorNode->nodeValue;
}
// add the found details to the result array
$result[] = array(
'id' => $id,
'authors' => $authors,
);
}
输出是您需要的：
array
0 =>
array
'id' => string '11482001' (length=8)
'authors' =>
array
0 => string 'Mantle D' (length=8)
1 => string 'Gok MA' (length=6)
2 => string 'Lennard TW' (length=10)