I'm trying to create regex to parse markdown links.
regex:
!\[[^\]]*\]\((.*)\s"(.*[^"])"?\s*\)
Test (link to live demo):
foo
bar
Group 1 will be image 2.png, and group 2 will be hello world.
The problem appears when I try to parse a link without title:
foo
bar
How I should modify regex to make it work in both cases?
Here's a complete regexp to match both the Alt text and the image url in a markdown file with a named capture group:
(?<alt>!\[[^\]]*\])\((?<filename>.*?)(?=\"|\))\)
The previously accepted answer only accounts for standard images, it's possible however that images could be used as links for hyperlinks, resulting in a nested image reference, such as:
](http://example.com/some?target)
A more complete regex pattern would like like this:
\[?(!)(?'alt'\[[^\]\[]*\[?[^\]\[]*\]?[^\]\[]*)\]\((?'url'[^\s]+?)(?:\s+(["'])(?'title'.*?)\4)?\)
This pattern also provides named groups for all the potential other info you might want about the image, such as "alt text" or "title".