Convert the first letter of every paragraph to upper case

[soma56]

From what I understand we can use ucfirst to convert the first letter within a string to upper case. What I would like to know is if there is a function that exists that would convert the first letter of every paragraph to upper case.

 

For example:

 

From:

This is a paragraph. 

is this the car blue?

let's go for a pint of beer!

 

To:

This is a paragraph. 

Is this the car blue?

Let's go for a pint of beer!

 

Does any such function exist?

[QuickOldCar]

<?php
function upperFirstWord($str) {
    return preg_replace('/([.!?])\s*(\w)/e', "strtoupper('\\1 \\2')", ucfirst(strtolower($str)));
}

echo upperFirstWord("This is a paragraph. 

is this the car blue?

let's go for a pint of beer!");
?>