add example.php and update readme

Author: julles

index.php example.phpindex.php renamed to example.php

@@ -1,8 +1,5 @@
 <?php
-
 include "vendor/autoload.php";
-
-// $str = stringer("reza");
 echo $str = stringer('azer')
 	->reverse()
 	->replace("a","i")

readme.md

@@ -14,8 +14,11 @@ $str = new RezaAr\Stringer\Stringer("php is awesome");
 // or
 $str = stringer("php is awesome");
 
-$str->reverse()->display(); // return "emosewa si php"
-$str->substring(0,1)->display(); // return "r"
+$str->reverse()
+	->display(); // return "emosewa si php"
+
+$str->substring(0,1)
+	->display(); // return "r"
 
 ?>