Question

我正在使用domDocument计算html表中的行数。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，$ rows为null。这是$ table

的内容

tagName:"table"
schemaTypeInfo:null
nodeName:"table" 
nodeValue:"\r\n\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\tCategoryAMA1A2ABBECCEC1C1EDDED1D1EW\r\n\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t"
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:"\r\n\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\tCategoryAMA1A2ABBECCEC1C1EDDED1D1EW\r\n\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t"

我已更改代码如下

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

我在表格中提交了2行表格，但计数为1。这是$ table

的内容

tagName:"table"
schemaTypeInfo:null
nodeName:"table" 
nodeValue: "\r\n\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\tCategoryAMA1A2ABBECCEC1C1EDDED1D1EW\r\n\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\tDate\r\n\t\t\t\t\t\t"
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: "\r\n\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\tCategoryAMA1A2ABBECCEC1C1EDDED1D1EW\r\n\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\t\t\r\n\t\t\t\t\t\t\tDate\r\n\t\t\t\t\t\t"

loadHTMLFile是否与file_get_contents具有相同的限制，只看到原始的html？

Answer 1

选择表格后，您可以使用getElementsByTagName获取其行。

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

结果将是DOMNodeList对象，其length属性应该是您正在寻找的计数。

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迭代这组行。

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

用domDocument计算html表行

1 个答案: