Question

Can I use some sort of regular expression / function in PHP or MySQL to check for a lowercase & uppercase letter next to each other?

I would want to detect the “y” & “C” between “Laparoscopy” & “Cataract Surgery”.

LaparoscopyCataract Surgery

More examples…

TracheostomyThoracotomy
TracheostomyAmniocentesis
Total Knee ReplacementBarium

etc…

I need to explode / separate all of these types of instances by a comma.

Answer 1

preg_replace("/([a-z])([A-Z])/", "$1,$2", $yourString);