No. That w3tech link is not properly separating out the versions by age. 5.6 isn't an ancient version of PHP for example; 5.1 is.
5.6.36 was released in April 2018; 5.6 was released in 2014. 5.1 was released in 2005 by contrast.
There's nothing terribly wrong with running 5.6x if you have a good reason to do so (eg legacy), other than that the performance sucks compared to 7.2.
5.6.36 was released in April 2018; 5.6 was released in 2014. 5.1 was released in 2005 by contrast.
There's nothing terribly wrong with running 5.6x if you have a good reason to do so (eg legacy), other than that the performance sucks compared to 7.2.
You can dig further into the w3tech numbers here:
https://w3techs.com/technologies/details/pl-php/5/all
Nobody is using 5 or 5.1. The majority of all PHP installations are using more modern versions, either 5.6x or 7.x.