SAEWEB2.2/ci/application/controllers/Playlist.php

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Playlist extends CI_Controller {

    public function __construct(){
        parent::__construct();
        $this->load->model('model_music');
    }

    public function index(){
        $playlists = $this->model_music->getPlaylist();
        //$this->load->view('layout/header_album');
        $this->load->view('playlist_list', ['playlists' => $playlists]);
        //$this->load->view('layout/footer_album');
    }

    public function view(){
        $playlists = $this->model_music->deletePlaylist();
        //$this->load->view('layout/header_album');
        $this->load->view('playlist_list', ['playlists' => $playlists]);
        //$this->load->view('layout/footer_album');
    }

    public function SongPLaylist($playlist_id){
        $songPlaylists = $this->model_music->getSongOfPlaylist($playlist_id);
        //$this->load->view('layout/header_album');
        $this->load->view('song_playlist', ['songPlaylists' => $songPlaylists]);
        //$this->load->view('layout/footer_album');
    }
}