Added documentation for validating arrays.

laravel/documentation/validation.md

@@ -55,6 +55,7 @@ Now you are familiar with the basic usage of the Validator class. You're ready t
 - [E-Mail Addresses](#rule-email)
 - [URLs](#rule-url)
 - [Uploads](#rule-uploads)
+- [Arrays](#rule-arrays)
 
 <a name="rule-required"></a>
 ### Required
@@ -245,6 +246,29 @@ The *mimes* rule validates that an uploaded file has a given MIME type. This rul
 
 	'picture' => 'image|max:100'
 
+<a name="rule-arrays"></a>
+### Arrays
+
+#### Validate that an attribute is an array
+
+	'categories' => 'array'
+
+#### Validate that an attribute is an array, and has exactly 3 elements
+
+	'categories' => 'array|count:3'
+
+#### Validate that an attribute is an array, and has between 1 and 3 elements
+
+	'categories' => 'array|countbetween:1,3'
+
+#### Validate that an attribute is an array, and has at least 2 elements
+
+	'categories' => 'array|countmin:2'
+
+#### Validate that an attribute is an array, and has at most 2 elements
+
+	'categories' => 'array|countmax:2'
+
 <a name="retrieving-error-messages"></a>
 ## Retrieving Error Messages