regex - How to detect if string contains 1 uppercase letter in PHP

Question

Couldn't find a function for this. I'm assuming I need to use regex?

I'm trying to do html redirects in php in cases where the url contains at least 1 upper case letter.

example: http://www.domain.com/Michael_Jordan needs to be redirected to http://www.domain.com/michael_jordan - only problem is I can't seem to find a script to detect if at least 1 capital letter exists.

Answer 1

Some regular expression should be able to the work, you can use preg_match and [A-Z]

if(preg_match('/[A-Z]/', $domain)){
 // There is at least one upper
}