PHP与DOMXPath-如何从这个html树中选择和计数

我需要数一数这些项目中有多少是开放的，有四种类型：简单、中等、困难和不想要。所有这些类型都是div中的值。我需要从计数中排除“不需要”类型。请注意，“打开”和“关闭”值周围有不同数量的空格。这是html结构：

<table>
    <tbody>
        <tr>
            <td>
                <div>Difficult</div>
            </td>
            <td>Name</td>
            <td>  Open </td>
        </tr>
        <tr>
            <td>
                <div>Easy</div>
            </td>
            <td>Name</td>
            <td> Closed  </td>
        </tr>
        <tr>
            <td>
                <div>Easy</div>
            </td>
            <td>Name</td>
            <td>   Open   </td>
        </tr>
        <tr>
            <td>
                <div>Medium</div>
            </td>
            <td>Name</td>
            <td>Open </td>
        </tr>
        <tr>
            <td>
                <div>Easy</div>
            </td>
            <td>Name</td>
            <td> Open     </td>
        </tr>
        <tr>
            <td>
                <div>Medium</div>
            </td>
            <td>Name</td>
            <td>  Closed</td>
        </tr>
        <tr>
            <td>
                <div>Easy</div>
            </td>
            <td>Name</td>
            <td>Closed </td>
        </tr>
        <tr>
            <td>
                <div>Not-wanted</div>
            </td>
            <td>Name</td>
            <td> Open </td>
        </tr>
        <tr>
            <td>
                <div>Difficult</div>
            </td>
            <td>Name</td>
            <td>Open</td>
        </tr>
        ............

我对DOMXPath有非常基本的了解，所以它对我来说太复杂了，因为我只能创建简单的查询

有人能帮忙吗

---

提前感谢。

基于示例中的数据，我认为您可以将xpath表达式调整为此，以获得所有符合您的条件的

：

//table/tbody/tr[normalize space（td[3]/text（））=“Open”和 td[1]/div/text（）！=“不需要”]

$elements

则为类型，然后可以获取

length

属性以获取列表中的节点数

例如：

$source = <<<SOURCE
<table>
    <tbody>
        <tr>
            <td>
                <div>Difficult</div>
            </td>
            <td>Name</td>
            <td>  Open </td>
        </tr>
        <tr>
            <td>
                <div>Easy</div>
            </td>
            <td>Name</td>
            <td> Closed  </td>
        </tr>
        <tr>
            <td>
                <div>Easy</div>
            </td>
            <td>Name</td>
            <td>   Open   </td>
        </tr>
        <tr>
            <td>
                <div>Medium</div>
            </td>
            <td>Name</td>
            <td>Open </td>
        </tr>
        <tr>
            <td>
                <div>Easy</div>
            </td>
            <td>Name</td>
            <td> Open     </td>
        </tr>
        <tr>
            <td>
                <div>Medium</div>
            </td>
            <td>Name</td>
            <td>  Closed</td>
        </tr>
        <tr>
            <td>
                <div>Easy</div>
            </td>
            <td>Name</td>
            <td>Closed </td>
        </tr>
        <tr>
            <td>
                <div>Not-wanted</div>
            </td>
            <td>Name</td>
            <td> Open </td>
        </tr>
        <tr>
            <td>
                <div>Difficult</div>
            </td>
            <td>Name</td>
            <td>Open</td>
        </tr>
    </tbody>
</table>
SOURCE;

$doc = new DOMDocument();
$doc->loadHTML($source);
$doc->preserveWhiteSpace = false;
$xpath = new DOMXPath($doc);
$elements = $xpath->query("//table/tbody/tr[normalize-space(td[3]/text()) = 'Open' and td[1]/div/text() != 'Not-wanted']");
echo $elements->length;

$source=query（“//table/tbody/tr[normalize space（td[3]/text（））='Open'和td[1]/div/text（）！='Not wanted']）；
echo$元素->长度；

这将导致：

五,

---

根据示例中的数据，我认为您可以将xpath表达式调整为此，以获得所有符合您的条件的

：

//table/tbody/tr[normalize space（td[3]/text（））=“Open”和 td[1]/div/text（）！=“不需要”]

$elements

则为类型，然后可以获取

length

属性以获取列表中的节点数

例如：

$source = <<<SOURCE
<table>
    <tbody>
        <tr>
            <td>
                <div>Difficult</div>
            </td>
            <td>Name</td>
            <td>  Open </td>
        </tr>
        <tr>
            <td>
                <div>Easy</div>
            </td>
            <td>Name</td>
            <td> Closed  </td>
        </tr>
        <tr>
            <td>
                <div>Easy</div>
            </td>
            <td>Name</td>
            <td>   Open   </td>
        </tr>
        <tr>
            <td>
                <div>Medium</div>
            </td>
            <td>Name</td>
            <td>Open </td>
        </tr>
        <tr>
            <td>
                <div>Easy</div>
            </td>
            <td>Name</td>
            <td> Open     </td>
        </tr>
        <tr>
            <td>
                <div>Medium</div>
            </td>
            <td>Name</td>
            <td>  Closed</td>
        </tr>
        <tr>
            <td>
                <div>Easy</div>
            </td>
            <td>Name</td>
            <td>Closed </td>
        </tr>
        <tr>
            <td>
                <div>Not-wanted</div>
            </td>
            <td>Name</td>
            <td> Open </td>
        </tr>
        <tr>
            <td>
                <div>Difficult</div>
            </td>
            <td>Name</td>
            <td>Open</td>
        </tr>
    </tbody>
</table>
SOURCE;

$doc = new DOMDocument();
$doc->loadHTML($source);
$doc->preserveWhiteSpace = false;
$xpath = new DOMXPath($doc);
$elements = $xpath->query("//table/tbody/tr[normalize-space(td[3]/text()) = 'Open' and td[1]/div/text() != 'Not-wanted']");
echo $elements->length;

$source=query（“//table/tbody/tr[normalize space（td[3]/text（））='Open'和td[1]/div/text（）！='Not wanted']）；
echo$元素->长度；

这将导致：

五,