Modifying HTML tag elements using PHP

Question

I have been trying to modify HTML tag elements, I have a huge list of HTML files which needs to be modified.

I need the lines between the images and the following text removed. I am using PHP. I am using a DOMDocument to access all the nodes and I am also able to get the nodepath. But I am unable to get to modify that particular HTML tag from the nodepath. Is this possible?

This is what I have as of now:

$dom = new DOMDocument();
$dom->loadHTMLFile($pathname);
$i=0;
$allNodes = $dom->getElementsByTagName('*');
$tagNamesArray = array();
foreach($allNodes as $node) {
$tagNodePath = $node->getNodePath();
$tagName = end(explode('/',$node->getNodePath()));
$tagNamesArray[$i][1] = $tagName;
$tagNamesArray[$i][2] = $tagNodePath;
$i++;
}

checkForLines($tagNamesArray, $dom);

function checkForLines($tagsArray, $dom) {
$xPath = new DOMXpath($dom);
for($i=0 ; $i<(count($tagsArray)-1) ; $i++) {
    if($tagsArray[$i][1] == 'img' && $tagsArray[$i+1][1] == 'br') {
        echo $tagsArray[$i+1][2].'<br>';
        $lineTag = $xPath->query($tagsArray[$i+1][2]);
        $domElement = $dom->removeChild($lineTag);
    }
}
}

Can you show us the HTML you're attempting to modify? Perhaps the intended resulting HTML as well. — Sampson
– Sampson, Commented May 18, 2012 at 15:08
You could also make it easier by not using the cumbersome raw DOMDocument for modification. phpQuery or QueryPath allow for qp($html)->find("div a")->wrap("<p class=new>"); for example. — mario
– mario, Commented May 18, 2012 at 15:16
@JonathanSampson -- consider any image and after it some following text(be it <p> or <h1> etc...) between the image and text there are <br> tags which I want removed. I already have a file iterator which I am able to get the html files but I am unable to modify the source code. — Guru
– Guru, Commented May 18, 2012 at 15:17
@Guru: are you ever saving the file back to disk with $dom->saveHTMLFile($filename)? — prodigitalson
– prodigitalson, Commented May 18, 2012 at 15:23
@Guru Going on your comment here, I've provided an answer below. — Sampson
– Sampson, Commented May 18, 2012 at 15:44

Sampson · Accepted Answer · 2012-05-18 15:33:54Z

3

...consider any image and after it some following text(be it <p> or <h1> etc...) between the image and text there are <br> tags which I want removed...

If this is all you want to do:

$dom = new DOMDocument;
$dom->loadHTML( "<img src='foo.png' /><br/><p>Hello World</p>" );

$img = $dom->getElementsByTagName("img");

foreach ( $img as $current ) {
    $sibling = $current->nextSibling;
    if ( $sibling->nodeName === "br" )
        $current->parentNode->removeChild( $sibling );
}

echo $dom->saveHTML();

Which results in the following output:

<img src="foo.png"><p>Hello World</p>

answered May 18, 2012 at 15:33

Sampson

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2 Comments

Guru Over a year ago

Yes, thank you. My aim is to change a bunch of things but this was the fundamental step which I needed to understand. This works but for some reason, the image is not being displayed and this is not overwriting the original file. Any idea why ?

Sampson Over a year ago

@Guru If you want to write over the old file you need to use the $dom->saveHTMLFile() method. With regards to the image not being displayed, make sure you use your HTML, and not the sample HTML I used in the question. Instead of $dom->loadHTML(), use $dom->loadHTMLFile( $filename ).

Kofi Sammie · Accepted Answer · 2017-12-02 15:15:33Z

0

Create DOM from string

$html = str_get_html('<div id="hello">Hello</div><div id="world">World</div>');

$html->find('div', 1)->class = 'bar';

$html->find('div[id=hello]', 0)->innertext = 'foo';

echo $html;

answered Dec 2, 2017 at 15:15

Kofi Sammie

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