Is PHP compiled or interpreted?

Just keep in mind, if you need to source code every time to run the program, it means it is using Interpreter. So its an interpreted language.

On the other hand, if you compiled the source code and generate a compiled code which you can executed, then it is using complier. As here you don't need to source code. Like C, JAVA

The accepted answer is blatantly false. PHP IS compiled. End of story. Maybe not to native instructions but to an interpreted bytecode.