Why do we need PHP? Php is important to learn because it helps us to connect with the backend to store and retrieve data from forms, feedback columns, cookies, and store cache. For connectivity to the database, we need PHP. In this module, we are going to learn how to use PHP to connect frontend and backend so that website works effectively this includes Introduction, syntax, variables, comments, functions, conditions, arrays, strings, constructors, destructors, sessions, handling, and others. View Complete Course Syllabus PHP.