How this can be done in PHP?

The class Movie is started below. An instance of class Movie represents a film. This class has the following three class variables:

• title, which is a string representing the title of the movie
• studio, which is a string representing the studio that made the movie
• rating, which is a string representing the rating of the movie (i.e. PG13, R, etc)

1. Write a constructor for the class Movie, which takes the title of the movie, studio, and rating as its arguments, and sets the respective class variables to these values.
2. Write a method GetPG, which takes an array of base type Movie as its argument, and returns a new array of only those movies in the input array with a rating of "PG". You may assume the input array is full of Movie instances. The returned array may be empty.
3. Write a piece of code that creates an instance of the class Movie:
   • with the title Casino Royale, the studio Eon Productions and the rating PG13;
   • with the title Glass, the studio Buena Vista International and the rating PG13;
   • with the title Spider-Man: Into the Spider-Verse, the studio Columbia Pictures and the rating PG.