InputHandler optimisations.

- InputItem can now be used like array (for example: input()->get('items')[0]) if value is array.
- Changed default-value parameter for get, post, file can now be mixed to allow object as return-type.

src/Pecee/Http/Input/InputItem.php

@@ -2,10 +2,11 @@
 
 namespace Pecee\Http\Input;
 
+use ArrayAccess;
 use ArrayIterator;
 use IteratorAggregate;
 
-class InputItem implements IInputItem, IteratorAggregate
+class InputItem implements ArrayAccess, IInputItem, IteratorAggregate
 {
     public $index;
     public $name;
@@ -75,9 +76,34 @@ class InputItem implements IInputItem, IteratorAggregate
         return $this;
     }
 
+    public function offsetExists($offset): bool
+    {
+        return isset($this->value[$offset]);
+    }
+
+    public function offsetGet($offset)
+    {
+        if ($this->offsetExists($offset) === true) {
+            return $this->value[$offset];
+        }
+
+        return null;
+    }
+
+    public function offsetSet($offset, $value): void
+    {
+        $this->value[$offset] = $value;
+    }
+
+    public function offsetUnset($offset): void
+    {
+        unset($this->data[$offset]);
+    }
+
     public function __toString(): string
     {
         $value = $this->getValue();
+
         return (is_array($value) === true) ? json_encode($value) : $value;
     }