PHP makes writing and supporting webapps easy. More than that, it is easy to train and hire for roles, deploying and setting up servers is simple. And it can be

PHP makes writing and supporting webapps easy. More than that, it is easy to train and hire for roles, deploying and setting up servers is simple. And it can be more efficient than ruby and python, although that depends on the skill of the developers Advanced data analysis, machine learning, networking software, mobile/embedded are good things to implement in a different language.