clqms-be/app/Controllers/Religion.php

<?php
namespace App\Controllers;

use CodeIgniter\API\ResponseTrait;
use CodeIgniter\Controller;

class Religion extends Controller {
    use ResponseTrait;

    public function __construct() {
        $this->db = \Config\Database::connect();
    }

    public function index() {
    try {
        $sql = "select * from religion";
        $data = $this->db->query($sql)->getResultArray();

        return $this->respond([
            'status' => 'success',
            'message'=> "Religion fetched successfully",
            'data'   => $data,
        ], 200);
    } catch (\Exception $e) {
        return $this->failServerError('Something went wrong');
    }
    }
}