Parse html using PHP and loop through table rows and columns?

Question

I\'m trying to parse HTML from loadHTML but I\'m having trouble, I managed to loop through all s in the document but I don\'t know how to loop through

Answer 1

Would re-looping work?

$DOM->loadHTML($url);
$rows= $DOM->getElementsByTagName('tr');
$tds= $DOM->getElementsByTagName('td');

for ($i = 0; $i < $rows->length; $i++) {
// loop through columns
     for ($i = 0; $i < $tds->length; $i++) {
     // loop through rows

     }

}

EDIT You will also have to check the parent node to make sure that the rows parent is the tr you are currently in. Something like

if ($rows == tds->parent_node){
// do whatever
}

May not be syntactically 100% correct, but the concept is sound.

Answer 2

DOMElement also supports getElementsByTagName:

$DOM = new DOMDocument();
$DOM->loadHTMLFile("file path or url");
$rows = $DOM->getElementsByTagName("tr");
for ($i = 0; $i < $rows->length; $i++) {
    $cols = $rows->item($i)->getElementsbyTagName("td");
    for ($j = 0; $j < $cols->length; $j++) {
        echo $cols->item($j)->nodeValue, "\t";
        // you can also use DOMElement::textContent
        // echo $cols->item($j)->textContent, "\t";
    }
    echo "\n";
}

Answer 3

Use DOMXPath to query out the child column nodes with a relative xpath query, like this:

$xpath = new DOMXPath( $DOM);
$rows= $xpath->query('//table/tr');

foreach( $rows as $row) {
    $cols = $xpath->query( 'td', $row); // Get the <td> elements that are children of this <tr>
    foreach( $cols as $col) {
        echo $col->textContent;
    }
}

Edit: To start at specific rows and stop, keep your own index on the row by changing how you're iterating over the DOMNodeList:

$xpath = new DOMXPath( $DOM);
$rows= $xpath->query('//table/tr');

for( $i = 3, $max = $rows->length - 2; $i < $max, $i++) {
    $row = $rows->item( $i);
    $cols = $xpath->query( 'td', $row);
    foreach( $cols as $col) {
        echo $col->textContent;
    }
}