DocBlocks must start with two asterisks, multiline comments must start with a single asterisk, after the opening slash. Both must end with a single asterisk before the closing slash.
--- Original
+++ New
<?php
-/******
+/*
* Multiline comment with arbitrary asterisks count
- ******/
+ */
-/**\
+/*\
* Multiline comment that seems a DocBlock
*/
/**
* DocBlock with arbitrary asterisk count at the end
- **/
+ */
The rule is part of the following rule set:
PhpCsFixer\Fixer\Comment\MultilineCommentOpeningClosingFixer