Java is used in complex projects for enterprise-level, while PHP is used in projects with less complexity and is ideal for start-ups. Java comes as a general-purpose language, while PHP was created to make dynamic web pages and is serving multiple uses now.
Should I use PHP or Java?
Java is more secure as compared to PHP. PHP is less secure and seeks the help of other integrations and frameworks for security purposes. Well-known companies that use Java are Amazon, Uber, Infosys, LinkedIn, Airbnb, etc. Well-known companies that use PHP are Slack, Wikipedia, Tumblr, Facebook, Yahoo, etc.