XML解析

---

DOMXpath

---

TEXTや属性値の取得

//
//c:name[text()="下関地方気象台"]
//

//
//c:MeteorologicalInfos[@type="区域予報"]
//

ノード（node）

//--------------
// 時系列　雨
function get_jikeiretsu_rain($arg_xpath,$t) {
	$tag1 = $arg_xpath->query('//c:MeteorologicalInfos[@type="区域予報"]')->item(1);
	$tag2 = $arg_xpath->query(".//c:Item", $tag1)->item(1);
	$elements = $arg_xpath->query(".//c:WeatherPart/d:Weather", $tag2);
	return $elements->item($t)->nodeValue;
}

ノード表示（属性値）

//
//-------------------------------------------
// 任意の項目のみ表示
//-------------------------------------------

//echo "
";
//echo $elements->item(0)->nodeValue;
//echo "
";
//echo $elements->item(7)->nodeValue;


//echo $elements->item(0)->getAttribute('href');
//echo "
";
//echo $elements->getAttribute('href');
//echo "
";
//

//
//-------------------------------------------
// 全表示
//-------------------------------------------
/*
echo "
";
foreach ($elements as $node) {

  //echo $node;
  echo $node->nodeValue;
  //print_r($node->nodeValue);
  echo "
";

  // 属性表示　idの中身を表示　動作 OK！！
  //echo $node->getAttribute('description');
  //echo $node->getAttribute('condition');
  //echo $node->getAttribute('type');
  //echo $node->getAttribute('href');
}
*/
//

length

echo $xpath->query("//tag2")->length; //output 2 -> correct
echo $xpath->query("//tag2", $tag1)->length; //output 2 -> wrong, the query is not relative
echo $xpath->query(".//tag2", $tag1)->length; //output 1 -> correct (note the dot in front 

//
// 時刻フォーマット変換
return date( "n/j/H", strtotime($elements->item($t)->nodeValue));
//

参考リンク（nodeName、childnode、エトセトラ）

php DOMDocument nodeName property returning ‘#text’ with the nodeName

How get first level of dom elements by Domdocument PHP?

How do I do an XPath query on a DOMNode?

Traversing child nodes with PHP DOMXpath?

Get tag name and value of a given node using XMLReader, DOM, Xpath

hp domdocument get node value where attribute value is

php dom get all attributes of a node

Cannot Use parentNode with DomXpath in PHP