Hello, I need help sorting and counting instances of the words in a string.

Lets say I have a collection on words:

happy beautiful happy lines pear gin happy lines rock happy lines pear

How could I use php to count each instance of every word in the string and output it in a loop:

There are $count instances of $word

So that the above loop would output:

There are 4 instances of happy. There are 3 instances of lines. There are 2 instances of gin....

Thank you for your genius.