Regex capitalize first letter every word, also after a special character like a dash

Question

I use this #(\\s|^)([a-z0-9-_]+)#i for capitalize every first letter every word, i want it also to capitalize the letter if it\'s after a special mark like a da

Answer 1

Actually dont need to match full string just match the first non-uppercase letter like this:

'~\b([a-z])~'