PHP DOM - 通过选择名称获取所有选项值

Question

我需要从站点获取“选项”值。但是有不止一个“选择”。如何通过“选择名称”值获取“选项”值。 (通过select name=ctl02$dlOgretimYillari获取所有选项值)

<select name="ctl02$dlOgretimYillari" onchange="javascript:setTimeout('__doPostBack(\'ctl02$dlOgretimYillari\',\'\')', 0)" id="ctl02_dlOgretimYillari" class="NormalBlack">
            <option selected="selected" value="-40">2016-2017</option>

        </select>

我的代码:

$dom = new DOMDocument();
libxml_use_internal_errors(true);
$dom->loadHTML(mb_convert_encoding($content, 'HTML-ENTITIES', 'UTF-8'));
libxml_clear_errors();
$xpath = new DOMXpath($dom);
$options_value = array();
$options_name = array();
$options_selected = array();
foreach($dom->getElementsByTagName('option') as $option) {
    array_push($options_value, $option->getAttribute('value'));
    array_push($options_selected, $option->getAttribute('selected'));
    array_push($options_name, $option->nodeValue);
}

Answer 1

get all option value by select name=ctl02$dlOgretimYillari

使用 DOMXPath::query 的解决方案方法:

$content = '<select name="ctl02$dlOgretimYillari" onchange="javascript:setTimeout(\'__doPostBack(\'ctl02$dlOgretimYillari\',\'\')\', 0)" id="ctl02_dlOgretimYillari" class="NormalBlack">           <option selected="selected" value="-40">2016-2017</option>        </select>';

$doc = new DOMDocument();
libxml_use_internal_errors();
$doc->loadXML(mb_convert_encoding($content, 'HTML-ENTITIES', 'UTF-8'));

$xpath = new DOMXPath($doc);
$nodes = $xpath->query("//select[@name='ctl02\$dlOgretimYillari']/option/@value");

// outputting first option value
print_r($nodes->item(0)->nodeValue);

输出:

-40

---

对于附加条件:如何获取选项文本的值？

...
$nodes = $xpath->query("//select[@name='ctl02\$dlOgretimYillari']/option/text()");
...