Question

我正在尝试从本地HTML文件中提取内容。我使用HTML解析方法，但什么都没有。

PHP代码如下：

$doc = new \DOMDocument();
$doc->loadHTML("assets.html");
$tables = $doc->getElementsByTagName('table');
foreach($tables as $table) {
   $content = $doc->saveHTML($table);
 }
echo $content;

逐步调试，$doc->loadHTML("assets.html")返回true，DOMNodeList::__set_state(array( ))获得$tables。

assets.html的部分如下：

                                 <div class="btn-group">
                                    <button type="button" class="btn btn-info dropdown-toggle" id="manage" data-toggle="dropdown">
                                            新增
                                            <span class="caret"></span>
                                        </button>
                                        <ul class="dropdown-menu " role="menu">
                                            <li><a href="#" id="newassets">增加资产</a></li>
                                            <li><a href="#" id="newdetail">增加明细</a></li>

                                        </ul>
                                   </div>
                                    <button type="button" class="btn btn-danger" id="deleteassets" value="" >删除</button>
                                    <button type="button" class="btn btn-success" id="modifyassets" value="" >修改</button>
                                    <button type="button" class="btn btn-warning" id="lend-lease" value="" >领用</button>
                                </div>

                                  <div class="dataTable_hr_info">
                                    <table class="table table-striped table-bordered table-hover" action="" id="assetsInfo">
                                        <thead>
                                        <tr>
                                          <th data-field="state" data-checkbox="true"></th>
                                          <th data-field="pr" >序号</th>
                                          <th data-field="category">资产类别</th>
                                          <th data-field="name" >资产名称</th>
                                          <th data-field="model">型号</th>
                                          <th data-field="unit">单位</th>
                                          <th data-field="count">数量</th>

                                        </tr>
                                      </thead>
                                     </table>
                                  </div>
                              </div>
                      </div>

Answer 1

您正在从文件加载HTML，因此请使用：$doc->loadHTMLFile("assets.html");而不是$doc->loadHTML("assets.html");

之后您应该在$content内获取数据。

Answer 2

在您的代码中发现了一些错误。

1：你不能使用loadHTML方法来加载html。

2：在您的HTML文件中，某些代码未正确关闭。

检查以下代码，

<强> PHP

<?php
    $dom = new DomDocument();
    $dom->loadHTML(file_get_contents('assets.html'));
    $tables = $dom->documentElement->getElementsByTagName('table');
    foreach($tables as $table) {
        $content = $dom->saveHTML($table);
    }
    echo $content;
?>

<强> HTML

<div class="btn-group">
    <button type="button" class="btn btn-info dropdown-toggle" id="manage" data-toggle="dropdown">
            新增
    <span class="caret"></span>
    </button>
    <ul class="dropdown-menu " role="menu">
        <li><a href="#" id="newassets">增加资产</a></li>
        <li><a href="#" id="newdetail">增加明细</a></li>
    </ul>
</div>
<button type="button" class="btn btn-danger" id="deleteassets" value="" >删除</button>
<button type="button" class="btn btn-success" id="modifyassets" value="" >修改</button>
<button type="button" class="btn btn-warning" id="lend-lease" value="" >领用</button>
<div class="dataTable_hr_info">
    <table class="table table-striped table-bordered table-hover" action="" id="assetsInfo">
        <thead>
            <tr>
                <th data-field="state" data-checkbox="true"></th>
                <th data-field="pr" >1</th>
                <th data-field="category">2</th>
                <th data-field="name" >3</th>
                <th data-field="model">4</th>
                <th data-field="unit">5</th>
                <th data-field="count">6</th>
            </tr>
        </thead>
    </table>
</div>

PHP通过HTML解析提取HTML内容获取空对象

2 个答案: