mysql - PHP Many to Many Set Ids -

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For the purpose of this question, suppose we have many relationships to use three tables: In the syllabus, with courses and name enrollment with students of ID and name - course_id and student_id

In the train, Code> course.student_ids = [1,2,3,4,5]

And the railroad says that it will add / remove the ID as necessary. I want to do something similar in PHP. Something like this 

  set_courses ($ student_id, array (1,2,3,4,5));   
 What was I thinking that if PHP is a good way to implement it efficiently, then I have 3 questions (to get an existing ID, to remove an unnecessary people, and I can think of a way to add a new people. Is there a way to do this in one or two questions?  
 Thank you!   
 
 
 If I understand you correctly, then you can do it in 2:  
  •  Insert enrollment   
     I use the transaction, though to ensure that both are executed   

     




  
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