Add random key doc (#70)

mnastalski · web-flow · commit b4ae03f3283b · 2022-06-26T16:42:54.000+02:00
diff --git a/docs/formatters/numbers-and-strings.md b/docs/formatters/numbers-and-strings.md
@@ -114,6 +114,16 @@ echo $faker->randomElement(['a', 'b', 'c', 'd', 'e']);
 // 'c'
 ```
 
+## `randomKey`
+
+Returns a random key from the given array.
+
+```php
+echo $faker->randomKey(['a' => 1, 'b' => 2, 'c' => 3]);
+
+// 'b'
+```
+
 ## `shuffle`
 
 Returns a shuffled version of either an array or string.
