I see on their website they are on version 7.x, and have documentation online there also for 6.x, 5.8, 5.7, 5.6, 5.5, 5.4, 5.3, 5.2, 5.1, 5.0, and 4.2.
For those with a conservative server software approach who install a Linux distro that will have long term support and then stick with it up until near the end of that long term, and stick with the version of PHP that came with the distro, we have to go back to 5.5 or 5.4 or maybe even earlier to get a Laravel that works with our PHP.
(Symfony appears to be at 5.3, with 4.4 and 3.4 still maintained. 3.4 will work with most major distros that are still in LTS, except I'm not sure about RHEL. 4.4 has the same requirements as Laravel 5.6, and so misses out on some existing LTS distros).
i would probably look at updating and keeping a more secure OS that can run modern software. Asking a framework to maintain a version of their framework for a version of PHP that is no longer supported, is not realistic.
also laravel is open source, if you want to update an old version because you want to run unsupported software, you are welcome to do it yourself also.
I see on their website they are on version 7.x, and have documentation online there also for 6.x, 5.8, 5.7, 5.6, 5.5, 5.4, 5.3, 5.2, 5.1, 5.0, and 4.2.
For those with a conservative server software approach who install a Linux distro that will have long term support and then stick with it up until near the end of that long term, and stick with the version of PHP that came with the distro, we have to go back to 5.5 or 5.4 or maybe even earlier to get a Laravel that works with our PHP.
(Symfony appears to be at 5.3, with 4.4 and 3.4 still maintained. 3.4 will work with most major distros that are still in LTS, except I'm not sure about RHEL. 4.4 has the same requirements as Laravel 5.6, and so misses out on some existing LTS distros).