Question

我需要得到＆＃34;选项＆＃34;来自网站的价值观。但是有多个选择＆＃34;。我如何获得＆＃34;选项＆＃34;值由＆＃34;选择名称＆＃34;价值。（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

通过选择name = ctl02 $ dlOgretimYillari
获取所有选项值

使用DOMXPath::query方法的解决方案：

$content = '<select name="ctl02$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

对于其他条件：如何获取选项文本的值？

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

Answer 2

@RomanPerekhrest的回答肯定解决了最初的问题！

但是对于我来说，我需要获取所有 selected 值，因此这是遇到相同问题的任何人的解决方案：

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

// Printing
foreach ($nodes as $node) {
    print_r($node->nodeValue);
}

PHP DOM - 通过选择名称获取所有选项值

2 个答案: