I am trying to write a function to clean up user input.
I am not trying to make it perfect. I would rather have a few names and acronyms in lowercase than a full paragraph in uppercase.
I think the function should use regular expressions but I'm pretty bad with those and I need some help.
If the following expressions are followed by a letter, I want to make that letter uppercase.
"." ". " (followed by a space) "!" "! " (followed by a space) "?" "? " (followed by a space)
Even better, the function could add a space after ".", "!" and "?" if those are followed by a letter.
How this can be achieved?
Since the modifier e is deprecated in PHP 5.5.0: