add whereInstanceOfMethod

src/Illuminate/Support/Collection.php

@@ -610,6 +610,19 @@ public function whereNotInStrict($key, $values)
         return $this->whereNotIn($key, $values, true);
     }
 
+    /**
+     * Filter the items, removing any items that don't match the given type.
+     *
+     * @param  string  $type
+     * @return static
+     */
+    public function whereInstanceOf($type)
+    {
+        return $this->filter(function ($value) use ($type) {
+            return $value instanceof $type;
+        });
+    }
+
     /**
      * Get the first item from the collection.
      *

tests/Support/SupportCollectionTest.php

@@ -495,6 +495,12 @@ public function testWhereStrict()
         );
     }
 
+    public function testWhereInstanceOf()
+    {
+        $c = new Collection([new stdClass, new stdClass, new Collection, new stdClass]);
+        $this->assertCount(3, $c->whereInstanceOf(stdClass::class));
+    }
+
     public function testWhereIn()
     {
         $c = new Collection([['v' => 1], ['v' => 2], ['v' => 3], ['v' => '3'], ['v' => 4]]);