使用 domDocument 计算 html 表行

Question

我正在使用domDocument来计算html表中的行。 这是我的代码

if(isset($_POST['List']) && $_POST['List'] == true)
{
    $data = file_get_contents('File.php');
    $dom = new domDocument;
    @$dom->loadHTML($data);
    $dom->preserveWhiteSpace = false;
    $table = $dom->getElementById('Table');
    $rows = substr_count($table, "<tr>");
    for($x=0;$x<$rows;$x++)
    {
    }
}

单步执行代码时，$rows为 null。这是$table的内容

tagName:"table"
schemaTypeInfo:null
nodeName:"table" 
nodeValue:"rntttttttrnttttttttCategoryAMA1A2ABBECCEC1C1EDDED1D1EWrntttttttrnttttttttrntttttt"
nodeType:1
parentNode:"(object value omitted)"
childNodes:"(object value omitted)"
firstChild:"(object value omitted)"
lastChild:"(object value omitted)"
previousSibling:"(object value omitted)"
nextSibling:null
attributes:"(object value omitted)"
ownerDocument:"(object value omitted)"
namespaceURI:null
prefix:""
localName:"table"
baseURI:null
textContent:"rntttttttrnttttttttCategoryAMA1A2ABBECCEC1C1EDDED1D1EWrntttttttrnttttttttrntttttt"

我更改了代码如下

$url = "http://".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
$doc = new domDocument();
@$doc->loadHTMLFile($url);
$table = $doc->getElementById('Table');
$rows = $table->getElementsByTagName('tr');
$count = count($rows);

我提交了表格中的 2 行，但计数为 1。这是$table的内容

tagName:"table"
schemaTypeInfo:null
nodeName:"table" 
nodeValue: "rntttttttrnttttttttCategoryAMA1A2ABBECCEC1C1EDDED1D1EWrntttttttrnttttttttrntttttttDaterntttttt"
nodeType:1
parentNode:"(object value omitted)"
childNodes:"(object value omitted)"
firstChild:"(object value omitted)"
lastChild:"(object value omitted)"
previousSibling:"(object value omitted)"
nextSibling:null
attributes:"(object value omitted)"
ownerDocument:"(object value omitted)"
namespaceURI:null
prefix:""
localName:"table"
baseURI:null
textContent: "rntttttttrnttttttttCategoryAMA1A2ABBECCEC1C1EDDED1D1EWrntttttttrnttttttttrntttttttDaterntttttt"

loadHTMLFile 是否具有与file_get_contents相同的限制，只看到原始 html？

Answer 1

选择表后，可以使用 getElementsByTagName 获取其行。

$rows = $table->getElementsByTagName('tr');

结果将是一个具有 length 属性的 DOMNodeList 对象，该属性应该是您要查找的计数。

echo $rows->length;

看起来您只是使用行计数来设置 for 循环，这可能不是必需的，因为您可以使用 foreach 迭代行集。

foreach ($rows as $row) {
    // do something with the row
}