Where should a function to convert an integer to a string be placed in the MVC architecture when dealing with project profiles in PHP?

When dealing with project profiles in PHP using the MVC architecture, a function to convert an integer to a string should be placed in the model layer. This conversion logic is related to data manipulation and should be handled by the model, which is responsible for interacting with the database and processing data. By placing this function in the model, you keep the controller lean and focused on handling user input and application flow, while the view remains responsible for presenting data to the user.

// Model class for project profiles
class ProjectProfileModel {
    
    // Function to convert an integer to a string
    public function convertIntToString($number) {
        return strval($number);
    }
    
    // Other model functions related to project profiles
}