simple function for count sentence

String/CountSentences.php

@@ -0,0 +1,23 @@
+<?php
+
+/**
+ * This is a simple way to count sentence 
+ * using php preg_match_all() function 
+ * @param string $sentence
+ */
+
+function countSentences(string $sentence): int
+{
+    $sentence = trim($sentence);
+
+    return preg_match_all('/[^\s|^\...](\.|\!|\?)(?!\w)/', $sentence);
+}
+
+
+// example
+echo countSentences("Hi! Hello world."); // returns 2
+echo PHP_EOL;
+echo countSentences("i am testing. test...."); // returns 2
+echo PHP_EOL;
+echo countSentences("How are you?"); // returns 1
+echo PHP_EOL;