A given URL has code :-
<meta itemprop="price" content="12.00" />
I want to extract 12 to a new variable, I have no idea from where to begin because here we cannot use Tags PHP function which is used to extract normal meta tags!
In order to get all meta tags you should make use of XPath to select all nodes
$xmlsource = 'http://www.example.com/';
$d = new DOMDocument();
$d->loadHTML($xmlsource);
$xpath = new DOMXPath($d);
//find all elements with itemprop attribute
$nodes = $xpath->query('//*[@itemprop]');
foreach ($nodes as $node) {
}