Added syntax for variadic functions.

Mistralys · ondrejmirtes · commit 1c78fb189c7b · 2020-05-10T15:36:08.000+02:00
diff --git a/website/src/writing-php-code/phpdoc-types.md b/website/src/writing-php-code/phpdoc-types.md
@@ -183,3 +183,21 @@ The `callable` typehint has been in PHP for a long time. But it doesn't allow en
 * `callable(float ...$floats): (int|null)` (accepts multiple variadic float arguments, returns integer or null)
 
 Parameter types and return type are required. Use `mixed` if you don't want to use a more specific type.
+
+Variadic functions (variable amount of arguments)
+-------------------------
+
+This allows specifying functions or methods which have a variable amount of parameters (available in PHP [since v5.6](https://www.php.net/manual/en/migration56.new-features.php)).
+
+Your code can look like this:
+
+```php
+/**
+ * @param string $arg
+ * @param string ...$additional
+ */
+function foo($arg, ...$additional)
+{
+    
+}
+```
