Add solution 151.

Author: javadev

src/Algorithms/0151.reverse-words-in-a-string/reverse-words-in-a-string.php

@@ -0,0 +1,19 @@
+class Solution {
+
+    /**
+     * @param String $s
+     * @return String
+     */
+    function reverseWords($s) {
+        $words = explode(" ", $s);
+        $sb = "";
+        
+        for ($i = count($words)-1; $i>= 0; $i--){
+            if(strlen(trim($words[$i])) != 0){
+                $sb .= trim($words[$i]);
+                $sb .= " ";
+            }
+        }
+        return trim($sb);
+    }
+}