It is a good idea to familiarize yourself with XML Namespaces first.
I'm going to assume that at a higher level you have something that is explaining what image: represents. If you don't, that's a different problem and you arguably don't have XML, just something that looks a lot like it. Here's you exact same XML but wrapped in what I assume is an Image Sitemap as defined by Google.
$xml = <<<'TAG' <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1"> <url> <loc> <![CDATA[ https://www.news18.com/photogallery/photogallery/in-photos-five-most-expensive-face-masks-for-protection-from-covid-19-in-the-world-3519821.html ]]> </loc> <image:image> <image:loc> <![CDATA[ https://images.news18.com/ibnlive/uploads/2021/03/1615377235_mask-1.jpg ]]> </image:loc> <image:caption> <![CDATA[ ]]> </image:caption> </image:image> <image:image> <image:loc> <![CDATA[ https://images.news18.com/ibnlive/uploads/2021/03/1615377250_mask-2.jpg ]]> </image:loc> <image:caption> <![CDATA[ ]]> </image:caption> </image:image> </url> </urlset> TAG;
To access things by a namespace, you call children() on the node with the appropriate namespace expansion:
$doc = simplexml_load_string($xml); echo $doc->url[0]->children('http://www.google.com/schemas/sitemap-image/1.1')->image->loc;
This prints out:
https://images.news18.com/ibnlive/uploads/2021/03/1615377235_mask-1.jpg
