Php interview question

There is no magic list of interview questions: interviewers can (and do) ask what they want to know, they don't generally ask questions from any list (and not all interviews get the same questions even if they follow each other in the same company).

Even if there was a "magic list" that all interviewers followed, it would be useless to you as the interview isn't after the stock answer, and will almost certainly follow up with a request which depends on exactly what you said, and how you said it. Since that can't be on the mythical "interview questions sheet" it's pointless you learning a sheet worth of drivel as it won't explain the "why" behind it that the interviewer will look for.

Learn the subject, practice the code, and be honest - explain where you can but don't expect anything to help you "walk" an interview. Remember, the first minute or so nearly always decide if the candidate is employable by the company - and if the answer is "No" the rest of the interview is just a technicality!