[8.x] Add scan fluent method to Stringable (laravel#7626)

* [8.x] Add `scan` fluent method to Stringable

* Oops!

* Update helpers.md

Co-authored-by: Amir <a.rami@adaptech.me>
Co-authored-by: Taylor Otwell <taylor@laravel.com>

helpers.md

@@ -193,6 +193,7 @@ Laravel includes a variety of global "helper" PHP functions. Many of these funct
 [replaceLast](#method-fluent-str-replace-last)
 [replaceMatches](#method-fluent-str-replace-matches)
 [rtrim](#method-fluent-str-rtrim)
+[scan](#method-fluent-str-scan)
 [singular](#method-fluent-str-singular)
 [slug](#method-fluent-str-slug)
 [snake](#method-fluent-str-snake)
@@ -2443,6 +2444,17 @@ The `rtrim` method trims the right side of the given string:
 
     // '/Laravel'
 
+<a name="method-fluent-str-scan"></a>
+#### `scan` {.collection-method}
+
+The `scan` method parses input from a string into a collection according to a format supported by the [`sscanf` PHP function](https://www.php.net/manual/en/function.sscanf.php):
+
+    use Illuminate\Support\Str;
+
+    $collection = Str::of('filename.jpg')->scan('%[^.].%s');
+
+    // collect(['filename', 'jpg'])
+
 <a name="method-fluent-str-singular"></a>
 #### `singular` {.collection-method}