PHP框架设计之ThinkPHP5源码解析一

define('APP_PATH', __DIR__ . '/../application/');
define('APP_DEBUG', true);require __DIR__ . '/../thinkphp/start.php';

define('APP_PATH', __DIR__ . '/../application/');

define('APP_DEBUG', true);if (is_file(__DIR__ . '/../vendor/autoload.php')) {    require_once __DIR__ . '/../vendor/autoload.php';
} else {    require __DIR__ . '/../thinkphp/start.php';
}

namespace think;

// ThinkPHP 引导文件
// 加载基础文件
require __DIR__ . '/base.php';
// 执行应用
App::run()->send();

define('THINK_VERSION', '5.0.2'); 
//TP版本号define('THINK_START_TIME', microtime(true));
//启动时间define('THINK_START_MEM', memory_get_usage());
//获取分配给 PHP 的内存量define('EXT', '.php'); 
//文件后缀define('DS', DIRECTORY_SEPARATOR);
//系统分隔符defined('THINK_PATH') or define('THINK_PATH', __DIR__ . DS);
//项目根目录define('LIB_PATH', THINK_PATH . 'library' . DS);
//类库目录define('CORE_PATH', LIB_PATH . 'think' . DS);
//核心文件目录define('TRAIT_PATH', LIB_PATH . 'traits' . DS);
//复用机制文件目录defined('APP_PATH') or define('APP_PATH', dirname($_SERVER['SCRIPT_FILENAME']) . DS);
//应用根目录defined('ROOT_PATH') or define('ROOT_PATH', dirname(realpath(APP_PATH)) . DS);
//根目录defined('EXTEND_PATH') or define('EXTEND_PATH', ROOT_PATH . 'extend' . DS);
//扩展目录defined('VENDOR_PATH') or define('VENDOR_PATH', ROOT_PATH . 'vendor' . DS);
//第三方库和插件放置defined('RUNTIME_PATH') or define('RUNTIME_PATH', ROOT_PATH . 'runtime' . DS);
//运行缓存目录defined('LOG_PATH') or define('LOG_PATH', RUNTIME_PATH . 'log' . DS);
//日志文件目录defined('CACHE_PATH') or define('CACHE_PATH', RUNTIME_PATH . 'cache' . DS);
//缓存文件目录defined('TEMP_PATH') or define('TEMP_PATH', RUNTIME_PATH . 'temp' . DS);
//临时目录defined('CONF_PATH') or define('CONF_PATH', APP_PATH); 
// 配置文件目录defined('CONF_EXT') or define('CONF_EXT', EXT); 
// 配置文件后缀defined('ENV_PREFIX') or define('ENV_PREFIX', 'PHP_'); 
// 环境变量的配置前缀
// 环境常量
define('IS_CLI', PHP_SAPI == 'cli' ? true : false);
define('IS_WIN', strpos(PHP_OS, 'WIN') !== false);

// 载入Loader类
require CORE_PATH . 'Loader.php';

// 加载环境变量配置文件
if (is_file(ROOT_PATH . '.env')) {
 $env = parse_ini_file(ROOT_PATH . '.env', true);
 foreach ($env as $key => $val) {
 $name = ENV_PREFIX . strtoupper($key);
 if (is_array($val)) {
 foreach ($val as $k => $v) {
 $item = $name . '_' . strtoupper($k);
 putenv("$item=$v");
 }
 } else {
 putenv("$name=$val");
 }
 }
}

// 注册自动加载
\think\Loader::register();

// 注册错误和异常处理机制
\think\Error::register();

// 加载惯例配置文件
\think\Config::set(include THINK_PATH . 'convention' . EXT);

private static $prefixLengthsPsr4 = [];private static $prefixDirsPsr4    = [];

public static function autoload($class){}

if (isset(self::$map[$class])) {    if (is_file(self::$map[$class])) {
        APP_DEBUG && self::$load[] = self::$map[$class];        include self::$map[$class];
    }
}

elseif ($file = self::findFileInComposer($class)) {
    APP_DEBUG && self::$load[] = $file;    include $file;
}

else {    if (!strpos($class, '\\')) {        return;
    }    list($name, $class) = explode('\\', $class, 2);    
    if (isset(self::$namespace[$name])) {        $path = self::$namespace[$name];
    } elseif (is_dir(EXTEND_PATH . $name)) {        $path = EXTEND_PATH . $name . DS;
    } else {        return;
    }    $filename = $path . str_replace('\\', DS, $class) . EXT;    
    if (is_file($filename)) {        if (APP_DEBUG && IS_WIN && false === strpos(realpath($filename), $class . EXT)) {            return;
        }

        APP_DEBUG && self::$load[] = $filename;        include $filename;
    } else {
        Log::record('autoloader error : ' . $filename, 'notice');
    }
}

if (is_array($class)) {    self::$map = array_merge(self::$map, $class);
} else {    self::$map[$class] = $map;
}

if (is_array($namespace)) {    self::$namespace = array_merge(self::$namespace, $namespace);
} else {    self::$namespace[$namespace] = $path;
}

spl_autoload_register($autoload ? $autoload : 'think\\Loader::autoload');self::registerComposerLoader();

private static function composerRequire($fileIdentifier, $file){}private static function findFileInComposer($class, $ext = '.php'){}