警告：为foreach（）PHP DOM提供的参数无效

Question

I am trying to get the <td> from a specific row, but I always encounter the Warning: Invalid argument supplied for foreach() error.

MY CODE:

$dom = new domDocument;
@$dom->loadHTML($notes); #$notes - value of textarea
$dom->preserveWhiteSpace = false;
$rows = $dom->getElementsByTagName('tr');
$moths = $rows->item(0)->nodeValue; #first row
$mothlast = $rows->item($rows->length - 1)->nodeValue; #lastrow

foreach ($moths as $moth) 
{
    $cols_mother = $moth->getElementsByTagName('td'); trying to get the columns of the first row of table
    $rli_mother = strip_tags($cols_mother->item(0)->nodeValue);

    echo $rli_mother; #first row
}

Any help would be gladly appreciated. thank you!!!

Answer 1

You should be using

foreach($rows as $row){
    $td = ....

$moths is not an array of <tr>s, but $rows is

If you're wanting the first row only then just use

$first = $rows->item(0);

This will return the whole node and allow you to use it, where as nodeValue just returns a string containing the value