I want to get Image from wikipedia by title, for example I have a image title File:Island of Ireland location map Dublin.svg, and I also know the page id 1642839. Any way to get the image url/link?
Using Api You can.
https://en.wikipedia.org/w/api.php?action=query&prop=info|extracts|pageimages|images&inprop=url&exsentences=1&titles=india
prop=pageimages
Prop plays an important role.if you want image description, you can get it by prop=pageimages|pageterms
we can also get the original image using piprop=original
or if you want in thumbnail size image, you can get it using piprop=thumbnail&pithumbsize=500
if the size height/width=500
if we want to request in Json format, we should always use formatversion=2 in the Api Query.
Original Image Size
https://en.wikipedia.org/w/api.php?action=query&format=json&formatversion=2&prop=pageimages|pageterms&piprop=original&titles=Albert Einstein
Thumbnail Image Size
https://en.wikipedia.org/w/api.php?action=query&format=json&formatversion=2&prop=pageimages|pageterms&piprop=thumbnail&pithumbsize=500&titles=Albert Einstein
We can fetch the specific data using Api and by Modifying it too On Web and Mobile Apps.