I am working on Laravel 5.4 with PHP version 5.6.4. My goal is to upgrade my project to Laravel 5.7 with PHP 7.1.
Now my question is: Do I have to upgrade to 5.5 > 5.6 >
There are some articles on documentation. You can upgrade to 5.7 directly but be sure to modify critical sections from this links 5.5->5.6, 5.6->5.7. And make a backup of current project first