autoload.php

<?php
/**
 * Copyright (2022) Volcengine
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
function classLoader($class)
{
    $nsPrefix = 'Tos/';
    $path = str_replace('\\', DIRECTORY_SEPARATOR, $class);

    if (strpos($path, $nsPrefix) === 0) {
        $path = substr($path, strlen($nsPrefix));
        $file = __DIR__ . DIRECTORY_SEPARATOR . 'src' . DIRECTORY_SEPARATOR . $path . '.php';
        if (file_exists($file)) {
            require_once $file;
        }
    }
}

spl_autoload_register('classLoader');