PHP Get last n sentences from a string

Question

Let's say I have the string below

$string = 'PHP Coding.
Hello World!
Merry Christmas!
Happy New Year!
Merry Super Early Next Christmas?
I want Pizza, and Cake
Hehehe
Hohohoho';

How do I get the last n sentences from the string, for example, the last 3 sentences, which should give the following output:

I want Pizza, and Cake
Hehehe
Hohohoho

Edit: I'm using data from sql

Answer 1

This should work for you:

<?php

    $string = 'PHP Coding.
            Hello World!
            Merry Christmas!
            Happy New Year!
            Merry Super Early Next Christmas?
            I want Pizza, and Cake
            Hehehe
            Hohohoho';

    list($sentence[], $sentence[], $sentence[]) = array_slice(explode(PHP_EOL, $string), -3, 3);

    print_r($sentence);

?>

Output:

Array ( [2] => Hohohoho [1] => Hehehe [0] => I want Pizza, and Cake )

EDIT :

Here you can define how many sentence you want from the back:

<?php

    $string = 'PHP Coding.
            Hello World!
            Merry Christmas!
            Happy New Year!
            Merry Super Early Next Christmas?
            I want Pizza, and Cake
            Hehehe
            Hohohoho';

    $n = 3;

    $sentence = array_slice(explode(PHP_EOL, $string), -($n), $n);
    $sentence = array_slice(explode(PHP_EOL, nl2br($string)), -($n), $n); // Use this for echoing out in HTML
    print_r($sentence);

?>

Output:

Array ( [0] => I want Pizza, and Cake [1] => Hehehe [2] => Hohohoho )