PH7 is a in-process software C library which implements a highly-efficient embeddable bytecode compiler and a virtual machine for the PHP programming language. In other words, PH7 is a PHP engine which allow the host application to compile and execute PHP scripts in-process. PH7 is to PHP what SQLite is to SQL. As an embedded interpreter, it allows multiple interpreter states to coexist in the same program, without any interference between them. Programmatically, foreign functions in C/C++ can be added and values can be defined in the PHP environment. Being a quite small program, it is easy to comprehend, get to grips with, and use.