Docs: Fix @param type for get_posts()

src/wp-includes/post.php

@@ -2599,8 +2599,9 @@ function is_post_embeddable( $post = null ) {
  * @see WP_Query
  * @see WP_Query::parse_query()
  *
- * @param array $args {
- *     Optional. Arguments to retrieve posts. See WP_Query::parse_query() for all available arguments.
+ * @param array|string $args {
+ *     Optional. Array or query string of arguments to retrieve posts.
+ *     See WP_Query::parse_query() for all available arguments.
  *
  *     @type int        $numberposts      Total number of posts to retrieve. Is an alias of `$posts_per_page`
  *                                        in WP_Query. Accepts -1 for all. Default 5.

tests/phpunit/tests/post/getPosts.php

@@ -163,4 +163,18 @@ public function test_explicit_offset_non_0_should_override_paged() {
 
 		$this->assertSame( array( $p3 ), $found );
 	}
+
+	/**
+	 * Verifies that get_posts() accepts a query string for the `$args` parameter.
+	 *
+	 * @ticket 64813
+	 */
+	public function test_should_accept_query_string_args() {
+		$p1 = self::factory()->post->create();
+		$p2 = self::factory()->post->create();
+
+		$found = get_posts( 'numberposts=1&fields=ids' );
+
+		$this->assertSame( array( $p2 ), $found );
+	}
 }