Trial by Data

Summary

Server-side scripting language for web development.

Main Website	php.net
Version	7.1.0
Experience	Large user community, resources readily available

PHP is a popular server-side language and as a result it pretty easy to find information about.
Googling for specific questions often returns another person asking the very same question and someone else giving the precise answer.
Its easy to learn but it not as "cool" or as well designed as some of the more modern options such as Ruby or Python.