How to Store CActiveForm checkBoxList Array Data as a String in the Yii Database

View code:

View interface:

POST dump after submission:

Requirement: question_type needs to be inserted into the database as a string.

Solution 1: directly reset $_POST[‘QuestionOrder’][‘question_type’]:

Print the POST variable again:

Solution 2:

The result is that both solutions can insert |1|3|4| into the question_type    question type (1 replenishment, 2 exchange, 3 return, 4 refund, 5 other) field.