Define "excellent" and "Senior". Keep in mind that salaries are part of a compensation package, and thus only roughly comparable across companies. Net salaries also depend on your personal situation, and are thus even less comparable.
Let me put it this way: What is the salary range between a recent graduate with an OOP masters degree, with 6 months (PHP web development) work experience, and somebody with over 5 years work experience with the same university qualifications (M.Sc. in OOP).
Hope I am clear enough this time, if not please ask.