Question

I have a problem with a php DOM Object
http://php.net/manual/en/class.domdocument.php

Is it possible only to show content from the third tag and the second tag in that table?

/*** a new dom object ***/ 
$dom = new domDocument; 

/*** load the html into the object ***/ 
@$dom->loadHTML($html); 

/*** discard white space ***/ 
$dom->preserveWhiteSpace = false; 

/*** the table by its tag name ***/ 
$tables = $dom->getElementsByTagName('table'); 

/*** get all rows from the table ***/ 
$rows = $tables->item(0)->getElementsByTagName('tr'); 

/*** loop over the table rows ***/ 
foreach ($rows as $row) 
{ 
    /*** get each column by tag name ***/ 
    $cols = $row->getElementsByTagName('td'); 

    /*** echo the values ***/ 
    echo $cols->item(0)->nodeValue.'<br />'; 
    echo $cols->item(1)->nodeValue.'<br />'; 
    echo $cols->item(2)->nodeValue.'<br />'; 
    echo $cols->item(3)->nodeValue.'<br />';
    echo $cols->item(4)->nodeValue.'<br />';
    echo $cols->item(5)->nodeValue.'<br />';
    echo '<hr />'; 
} 

EDIT:

I get this error: Fatal error: Cannot use object of type DOMNodeList as array in

<?php

/*** a new dom object ***/ 
$dom = new domDocument; 

/*** load the html into the object ***/ 
@$dom->loadHTML('content.html'); 

/*** discard white space ***/ 
$dom->preserveWhiteSpace = false; 

$xpath = new DOMXPath($dom);

$selected = $xpath->query('//table/tr/td[first()+1]');
echo $selected[0]->nodeValue;
?>

Edit2:

<?php

$output = file_get_contents('test.php');

/*** a new dom object ***/ 
$dom = new domDocument; 

/*** load the html into the object ***/ 
@$dom->loadHTML($output); 

/*** discard white space ***/ 
$dom->preserveWhiteSpace = false; 

/*** the table by its tag name ***/ 
$tables = $dom->getElementsByTagName('table');//get all the tables

if($tables->length > 2) { //check there are more than 2

    $thirdTable = $tables->item(2);

    $cols = $thirdTable->getElementsByTagName('td'); 

    /*** echo the values ***/ 
    echo $cols->item(0)->nodeValue.'<br />'; 
    echo $cols->item(1)->nodeValue.'<br />'; 
    echo $cols->item(2)->nodeValue.'<br />'; 
    echo $cols->item(3)->nodeValue.'<br />';
    echo $cols->item(4)->nodeValue.'<br />';
    echo $cols->item(5)->nodeValue.'<br />';
    echo '<hr />'; 
}

?>

EDIT3 – This code only shows content from the third table tag. But it also need only to show content from the second tr tag in the third table.

$html = file_get_contents('content.html');

/*** a new dom object ***/ 
$dom = new domDocument; 

/*** load the html into the object ***/ 
@$dom->loadHTML($html); 

/*** discard white space ***/ 
$dom->preserveWhiteSpace = false; 

/*** the table by its tag name ***/ 
$tables = $dom->getElementsByTagName('table'); 

/*** get all rows from the table ***/ 
$rows = $tables->item(2)->getElementsByTagName('tr')->item(1); 

/*** loop over the table rows ***/ 
foreach ($rows as $row) 
{ 
    /*** get each column by tag name ***/ 
    $cols = $row->getElementsByTagName('td'); 

    /*** echo the values ***/ 
    echo $cols->item(0)->nodeValue.'<br />'; 
    echo $cols->item(1)->nodeValue.'<br />'; 
    echo $cols->item(2)->nodeValue.'<br />'; 
    echo $cols->item(3)->nodeValue.'<br />';
    echo $cols->item(4)->nodeValue.'<br />';
    echo $cols->item(5)->nodeValue.'<br />';
    echo '<hr />'; 
}

Answer 1

I don’t understand your problem. With $cols->item(2) you got the second DOMElement you need.

If you just want the first (or the second…) you can use XPath

$xpath = new DOMXpath($document);
$selected = $xpath->query('//table/tr/td[first()+1] | //table/tr/td[first()+2]');
echo $selected[0]->nodeValue;

If you do not want to use DOMXPath, you can stay with your getElementsByTagName
First you get all the tables
then you check there are more than 2
then you take the third
then you take the tr element
you keep in an array the second and the third

$tables = $dom->getElementsByTagName('table');//get all the tables
if($tables->length > 2){//check there are more than 2
    $thirdTable = $tables->item(2);
    //get the tr then td
}