Question

我使用CURL检索页面并存储HTML。我成功地做到了这一点并最终得到一个包含与此类似的HTML的变量（td中的内容不一样并且总是在变化）：

html code above....

   <tr class="myclass">
     <td>Dynamic Content One</td>
     <td>Dynamic Content Two</td>
     <td>Dynamic Content Three</td>
   </tr>

   <tr class="myclass">
     <td>Dynamic Content One</td>
     <td>Dynamic Content Two</td>
     <td>Dynamic Content Three</td>
   </tr>

   More of the same <tr> ......

html code below....

我的目标是解析html并有一个名为result（）的关联数组，它存储所有<tr>个元素，数组应如下所示：

$result[0]["first_content"] = "Dynamic Content One"
$result[0]["second_content"] = "Dynamic Content Two"
$result[0]["third_content"] = "Dynamic Content Three"

$result[1]["first_content"] = "Dynamic Content One"
$result[1]["second_content"] = "Dynamic Content Two"
$result[1]["third_content"] = "Dynamic Content Three"

.. more elements in array depending on how many <tr> there was

我发现解析这样的东西很安静。我已经使用了DOMdocument模块和DOMXpath模块，但我所拥有的只是拥有一个包含每个<td>元素的数组，并且不确定我将算法存储到数组中的位置。也许还有更好的方法吗？这是我目前的代码：

$dom = new DOMDocument;
        @$dom -> loadHTML($retrievedHtml);

        $xPath = new DOMXpath($dom);

        $xPathQuery = "//tr[@class='myclass']";
        $elements = $xPath -> query($xPathQuery);

        if(!is_null($elements)){

            $results = array();

            foreach($elements as $element){

                $nodes = $element -> childNodes;

                print $nodes -> nodeValue;

                foreach($nodes as $node){
                    $results[] = $node -> nodeValue;
                }

            }

Answer 1

要实现输出数组的结构（减去文本键，如＆＃34; first_content＆＃34;等），则每行为数组添加一个新维度并填充该维度。我认为这是你想要实现的目标！

$dom = new DOMDocument;
@$dom->loadHTML( $retrievedHtml );

$xPath = new DOMXpath($dom);

$xPathQuery = "//tr[@class='myclass']";
$elements = $xPath -> query( $xPathQuery );

if( !is_null( $elements ) ){

    $results = array();

    foreach( $elements as $index => $element ){

        $nodes = $element -> childNodes;

        foreach( $nodes as $subindex => $node ){
            /* Each table row is assigned in new level in array using $index */
            if( $node->nodeType == XML_ELEMENT_NODE ) $results[ $index ][] = $node->nodeValue;
        }
    }

    echo '<pre>',print_r( $results, true ),'</pre>';
}

解析HTML以在PHP中查找某些元素

1 个答案: