How do I get this link <li><a rel="prev" href="/1149/" accesskey="p">< Prev</a></li> from an html document using PHP? How do I get the link by the "rel"?
I'm trying to get /1149/
Trying to understand what you want… If you want to take an HTML/XML input and grab the href value of a link with the attribute rel="prev" I'd suggest using DOMXpath, something like:
$html = '<li><a rel="prev" href="/1149/" accesskey="p">< Prev</a></li>';
$dom = new DOMDocument();
$dom->loadHTML($html);
$xpath = new DOMXPath($dom);
foreach ($xpath->query("//a[#rel='prev']") as $node) {
if ($node->hasAttribute('href')) {
echo $node->getAttribute('href') . '<br>';
}
}
Related
I'm new to PHP and I would like to know how to retrieve data from an HTML element such as an src?
It's very easy to do that in jQuery:
$('img').attr('src');
But I have no idea how to do it in PHP (if it is possible).
Here's an example I'm working on:
I loaded $result into SimpleXMLElement and stored it into $xml:
$xml = simplexml_load_string($result) or die("Error: Cannot create object");
Then used foreach to loop over all elements:
foreach($xml->links->link as $link){
echo 'Image: ' . $link->{'link-code-html'}[0] . '</br>';
// returns sometihing similar to: <a href='....'><img src='....'></a>
}
Inside of the foreach I'm trying to access links (src) in img.
Is there a way to access src of the img nested inside of the a — clear when outputted to the screen:
echo 'Image: ' . $link->{'link-code-html'}[0] . '</br>';
I would do this with the built-in DOMDocument and DOMXPath APIs, and then you can use the getAttribute method on any matching img node:
$doc = new DOMDocument();
// Load some example HTML. If you need to load from file, use ->loadHTMLFile
$doc->loadHTML("<a href='abc.com'><img src='ping1.png'></a>
<a href='def.com'><img src='ping2.png'></a>
<a href='ghi.com'>something else</a>");
$xpath = new DOMXpath($doc);
// Collect the images that are children of anchor elements
$imgs = $xpath->query("//a/img");
foreach($imgs as $img) {
echo "Image: " . $img->getAttribute("src") . "\n";
}
I know there are similar question, but, trying to study PHP I met this error and I want understand why this occurs.
<?php
$url = 'http://aice.anie.it/quotazione-lme-rame/';
echo "hello!\r\n";
$html = new DOMDocument();
#$html->loadHTML($url);
$xpath = new DOMXPath($html);
$nodelist = $xpath->query(".//*[#id='table33']/tbody/tr[2]/td[3]/b");
foreach ($nodelist as $n) {
echo $n->nodeValue . "\n";
}
?>
this prints just "hello!". I want to print the value extracted with the xpath, but the last echo doesn't do anything.
You have some errors in your code :
You try to get the table from the url http://aice.anie.it/quotazione-lme-rame/, but it's actually in an iframe located at http://www.aiceweb.it/it/frame_rame.asp, so get the iframe url directly.
You use the function loadHTML(), which load an HTML string. What you need is the loadHTMLFile function, which takes the link of an HTML document as a parameter (See http://www.php.net/manual/fr/domdocument.loadhtmlfile.php)
You assume there is a tbody element on the page but there is no one. So remove that from your query filter.
Working code :
$url = 'http://www.aiceweb.it/it/frame_rame.asp';
echo "hello!\r\n";
$html = new DOMDocument();
#$html->loadHTMLFile($url);
$xpath = new DOMXPath($html);
$nodelist = $xpath->query(".//*[#id='table33']/tr[2]/td[3]/b");
foreach ($nodelist as $n) {
echo $n->nodeValue . "\n";
}
I'm trying to replace video links inside a string - here's my code:
$doc = new DOMDocument();
$doc->loadHTML($content);
foreach ($doc->getElementsByTagName("a") as $link)
{
$url = $link->getAttribute("href");
if(strpos($url, ".flv"))
{
echo $link->outerHTML();
}
}
Unfortunately, outerHTML doesn't work when I'm trying to get the html code for the full hyperlink like <a href='http://www.myurl.com/video.flv'></a>
Any ideas how to achieve this?
As of PHP 5.3.6 you can pass a node to saveHtml, e.g.
$domDocument->saveHtml($nodeToGetTheOuterHtmlFrom);
Previous versions of PHP did not implement that possibility. You'd have to use saveXml(), but that would create XML compliant markup. In the case of an <a> element, that shouldn't be an issue though.
See http://blog.gordon-oheim.biz/2011-03-17-The-DOM-Goodie-in-PHP-5.3.6/
You can find a couple of propositions in the users notes of the DOM section of the PHP Manual.
For example, here's one posted by xwisdom :
<?php
// code taken from the Raxan PDI framework
// returns the html content of an element
protected function nodeContent($n, $outer=false) {
$d = new DOMDocument('1.0');
$b = $d->importNode($n->cloneNode(true),true);
$d->appendChild($b); $h = $d->saveHTML();
// remove outter tags
if (!$outer) $h = substr($h,strpos($h,'>')+1,-(strlen($n->nodeName)+4));
return $h;
}
?>
The best possible solution is to define your own function which will return you outerhtml:
function outerHTML($e) {
$doc = new DOMDocument();
$doc->appendChild($doc->importNode($e, true));
return $doc->saveHTML();
}
than you can use in your code
echo outerHTML($link);
Rename a file with href to links.html or links.html to say google.com/fly.html that has flv in it or change flv to wmv etc you want href from if there are other href
it will pick them up as well
<?php
$contents = file_get_contents("links.html");
$domdoc = new DOMDocument();
$domdoc->preservewhitespaces=“false”;
$domdoc->loadHTML($contents);
$xpath = new DOMXpath($domdoc);
$query = '//#href';
$nodeList = $xpath->query($query);
foreach ($nodeList as $node){
if(strpos($node->nodeValue, ".flv")){
$linksList = $node->nodeValue;
$htmlAnchor = new DOMElement("a", $linksList);
$htmlURL = new DOMAttr("href", $linksList);
$domdoc->appendChild($htmlAnchor);
$htmlAnchor->appendChild($htmlURL);
$domdoc->saveHTML();
echo ("<a href='". $node->nodeValue. "'>". $node->nodeValue. "</a><br />");
}
}
echo("done");
?>
I am writing a little scraper script that will find the image URL that has a particular class name. I know that my cURL and DOMDocument is functioning okay, and even the DomXPath really (as far as I can tell, there are no errors) But I am struggling to work out how to get the URL of the xpath query results.
My code so far:
$dom = new DOMDocument();
#$dom->loadHTML($x);
$xpath = new DomXpath($dom);
$div = $xpath->query('//*[#class="productImage"]');
var_dump($div);
echo $div->item(0);
If I var_dump($x) the page outputs no problem. So the CURL is working fine. But I do not know how to get the data that is contained in the $div. I am trying to find an Image with a class of 'productImage' which looks like:
<img src="/uploads/5W/yP/5WyPP4l7Z-jmZRzu_MJ6zg/1077-d.jpg" border="1" alt="Album" class="productImage">
I want the source of that image tag.
Any suggestions?
$dom = new DOMDocument();
$dom->loadHTML($x);
$xpath = new DomXpath($dom);
$imgs = $xpath->query('//*[#class="productImage"]');
foreach($imgs as $img)
{
echo 'ImgSrc: ' . $img->getAttribute('src') .'<br />' . PHP_EOL;
}
Try that...
== EDIT: Additional Info ==
The reason I use a loop here is because you may find more than one img. If you know there is only one element (or you want the first dom node found) you can access the elelement from the domnodelist via the item method of domnodelist - like so:
$dom = new DOMDocument();
$dom->loadHTML($x);
$xpath = new DomXpath($dom);
$img = $xpath->query('//*[#class="productImage"]');
echo 'ImgSrc: ' . $img->item(0)->getAttribute('src') .'<br />' . PHP_EOL;
You don't actually need to use XPath here, because it seems that you're just after images and that can be done by using DOMDocument::getElementsByTagName(), followed by a simple filter:
foreach ($dom->getElementsByTagName('img') as $image) {
$class = $image->getAttribute('class');
if (strpos(" $class ", " productImage ") !== false) {
$url = $image->getAttribute('src');
// do stuff
}
}
Then, you can get the src attribute by using DOMElement::getAttribute():
echo $image->getAttribute('src');
I am using the following code to grab html from another page and place it into my php page:
$doc = new DomDocument;
// We need to validate our document before refering to the id
$doc->validateOnParse = true;
$doc->loadHtml(file_get_contents('{URL IS HERE}'));
$content = $doc->getElementById('form2');
echo $doc->SaveHTML($content);
I want to change all instances of <a href="/somepath/file.htm"> so that I can prepend to it the actual domain instead. How can I do this?
So, it would need to change them to: <a href="http://mydomain.com/somepath/file.htm"> instead.
try something like:
$xml = new DOMDocument();
$xml->loadHTMLFile($url);
foreach($xml->getElementsByTagName('a') as $link) {
$oldLink = $link->getAttribute("href");
$link->setAttribute('href', "http://mydomain.com/" . $oldLink);
}
echo $xml->saveHtml();