- var_export: documentation ( source)
- preg_split: documentation ( source)
<?php
$str = 'Fry me a Beaver. Fry me a Beaver! Fry me a Beaver? Fry me Beaver no. 4?! Fry me many Beavers... End';
var_export(
preg_split('~[.?!]+\K\s+(?=[A-Z])~', $str, 0, PREG_SPLIT_NO_EMPTY)
);