library\think\Loader.php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st
// +----------------------------------------------------------------------
namespace think;
use think\exception\ClassNotFoundException;
class Loader
{
protected static $instance = [];
// 类名映射
protected static $map = [];
// 命名空间别名
protected static $namespaceAlias = [];
// PSR-4
private static $prefixLengthsPsr4 = [];
private static $prefixDirsPsr4 = [];
private static $fallbackDirsPsr4 = [];
// PSR-0
private static $prefixesPsr0 = [];
private static $fallbackDirsPsr0 = [];
// 自动加载的文件
private static $autoloadFiles = [];
// 自动加载
public static function autoload($class)
{
// 检测命名空间别名
if (!empty(self::$namespaceAlias)) {
$namespace = dirname($class);
if (isset(self::$namespaceAlias[$namespace])) {
$original = self::$namespaceAlias[$namespace] . '\\' . basename($class);
if (class_exists($original)) {
return class_alias($original, $class, false);
}
}
}
if ($file = self::findFile($class)) {
// Win环境严格区分大小写
if (IS_WIN && pathinfo($file, PATHINFO_FILENAME) != pathinfo(realpath($file), PATHINFO_FILENAME)) {
return false;
}
__include_file($file);
return true;
}
}
/**
* 查找文件
* @param $class
* @return bool
*/
private static function findFile($class)
{
if (!empty(self::$map[$class])) {
// 类库映射
return self::$map[$class];
}
// 查找 PSR-4
$logicalPathPsr4 = strtr($class, '\\', DS) . EXT;
$first = $class[0];
if (isset(self::$prefixLengthsPsr4[$first])) {
foreach (self::$prefixLengthsPsr4[$first] as $prefix => $length) {
if (0 === strpos($class, $prefix)) {
foreach (self::$prefixDirsPsr4[$prefix] as $dir) {
if (is_file($file = $dir . DS . substr($logicalPathPsr4, $length))) {
return $file;
}
}
}
}
}
// 查找 PSR-4 fallback dirs
foreach (self::$fallbackDirsPsr4 as $dir) {
if (is_file($file = $dir . DS . $logicalPathPsr4)) {
return $file;
}
}
// 查找 PSR-0
if (false !== $pos = strrpos($class, '\\')) {
// namespaced class name
$logicalPathPsr0 = substr($logicalPathPsr4, 0, $pos + 1)
. strtr(substr($logicalPathPsr4, $pos + 1), '_', DS);
} else {
// PEAR-like class name
$logicalPathPsr0 = strtr($class, '_', DS) . EXT;
}
if (isset(self::$prefixesPsr0[$first])) {
foreach (self::$prefixesPsr0[$first] as $prefix => $dirs) {
if (0 === strpos($class, $prefix)) {
foreach ($dirs as $dir) {
if (is_file($file = $dir . DS . $logicalPathPsr0)) {
return $file;
}
}
}
}
}
// 查找 PSR-0 fallback dirs
foreach (self::$fallbackDirsPsr0 as $dir) {
if (is_file($file = $dir . DS . $logicalPathPsr0)) {
return $file;
}
}
return self::$map[$class] = false;
}
// 注册classmap
public static function addClassMap($class, $map = '')
{
if (is_array($class)) {
self::$map = array_merge(self::$map, $class);
} else {
self::$map[$class] = $map;
}
}
// 注册命名空间
public static function addNamespace($namespace, $path = '')
{
if (is_array($namespace)) {
foreach ($namespace as $prefix => $paths) {
self::addPsr4($prefix . '\\', rtrim($paths, DS), true);
}
} else {
self::addPsr4($namespace . '\\', rtrim($path, DS), true);
}
}
// 添加Ps0空间
private static function addPsr0($prefix, $paths, $prepend = false)
{
if (!$prefix) {
if ($prepend) {
self::$fallbackDirsPsr0 = array_merge(
(array) $paths,
self::$fallbackDirsPsr0
);
} else {
self::$fallbackDirsPsr0 = array_merge(
self::$fallbackDirsPsr0,
(array) $paths
);
}
return;
}
$first = $prefix[0];
if (!isset(self::$prefixesPsr0[$first][$prefix])) {
self::$prefixesPsr0[$first][$prefix] = (array) $paths;
return;
}
if ($prepend) {
self::$prefixesPsr0[$first][$prefix] = array_merge(
(array) $paths,
self::$prefixesPsr0[$first][$prefix]
);
} else {
self::$prefixesPsr0[$first][$prefix] = array_merge(
self::$prefixesPsr0[$first][$prefix],
(array) $paths
);
}
}
// 添加Psr4空间
private static function addPsr4($prefix, $paths, $prepend = false)
{
if (!$prefix) {
// Register directories for the root namespace.
if ($prepend) {
self::$fallbackDirsPsr4 = array_merge(
(array) $paths,
self::$fallbackDirsPsr4
);
} else {
self::$fallbackDirsPsr4 = array_merge(
self::$fallbackDirsPsr4,
(array) $paths
);
}
} elseif (!isset(self::$prefixDirsPsr4[$prefix])) {
// Register directories for a new namespace.
$length = strlen($prefix);
if ('\\' !== $prefix[$length - 1]) {
throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
}
self::$prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
self::$prefixDirsPsr4[$prefix] = (array) $paths;
} elseif ($prepend) {
// Prepend directories for an already registered namespace.
self::$prefixDirsPsr4[$prefix] = array_merge(
(array) $paths,
self::$prefixDirsPsr4[$prefix]
);
} else {
// Append directories for an already registered namespace.
self::$prefixDirsPsr4[$prefix] = array_merge(
self::$prefixDirsPsr4[$prefix],
(array) $paths
);
}
}
// 注册命名空间别名
public static function addNamespaceAlias($namespace, $original = '')
{
if (is_array($namespace)) {
self::$namespaceAlias = array_merge(self::$namespaceAlias, $namespace);
} else {
self::$namespaceAlias[$namespace] = $original;
}
}
// 注册自动加载机制
public static function register($autoload = '')
{
// 注册系统自动加载
spl_autoload_register($autoload ?: 'think\\Loader::autoload', true, true);
// 注册命名空间定义
self::addNamespace([
'think' => LIB_PATH . 'think' . DS,
'behavior' => LIB_PATH . 'behavior' . DS,
'traits' => LIB_PATH . 'traits' . DS,
]);
// 加载类库映射文件
if (is_file(RUNTIME_PATH . 'classmap' . EXT)) {
self::addClassMap(__include_file(RUNTIME_PATH . 'classmap' . EXT));
}
// Composer自动加载支持
if (is_dir(VENDOR_PATH . 'composer')) {
self::registerComposerLoader();
}
// 自动加载extend目录
self::$fallbackDirsPsr4[] = rtrim(EXTEND_PATH, DS);
}
// 注册composer自动加载
private static function registerComposerLoader()
{
if (is_file(VENDOR_PATH . 'composer/autoload_namespaces.php')) {
$map = require VENDOR_PATH . 'composer/autoload_namespaces.php';
foreach ($map as $namespace => $path) {
self::addPsr0($namespace, $path);
}
}
if (is_file(VENDOR_PATH . 'composer/autoload_psr4.php')) {
$map = require VENDOR_PATH . 'composer/autoload_psr4.php';
foreach ($map as $namespace => $path) {
self::addPsr4($namespace, $path);
}
}
if (is_file(VENDOR_PATH . 'composer/autoload_classmap.php')) {
$classMap = require VENDOR_PATH . 'composer/autoload_classmap.php';
if ($classMap) {
self::addClassMap($classMap);
}
}
if (is_file(VENDOR_PATH . 'composer/autoload_files.php')) {
$includeFiles = require VENDOR_PATH . 'composer/autoload_files.php';
foreach ($includeFiles as $fileIdentifier => $file) {
if (empty(self::$autoloadFiles[$fileIdentifier])) {
__require_file($file);
self::$autoloadFiles[$fileIdentifier] = true;
}
}
}
}
/**
* 导入所需的类库 同java的Import 本函数有缓存功能
* @param string $class 类库命名空间字符串
* @param string $baseUrl 起始路径
* @param string $ext 导入的文件扩展名
* @return boolean
*/
public static function import($class, $baseUrl = '', $ext = EXT)
{
static $_file = [];
$key = $class . $baseUrl;
$class = str_replace(['.', '#'], [DS, '.'], $class);
if (isset($_file[$key])) {
return true;
}
if (empty($baseUrl)) {
list($name, $class) = explode(DS, $class, 2);
if (isset(self::$prefixDirsPsr4[$name . '\\'])) {
// 注册的命名空间
$baseUrl = self::$prefixDirsPsr4[$name . '\\'];
} elseif ('@' == $name) {
//加载当前模块应用类库
$baseUrl = App::$modulePath;
} elseif (is_dir(EXTEND_PATH . $name)) {
$baseUrl = EXTEND_PATH . $name . DS;
} else {
// 加载其它模块的类库
$baseUrl = APP_PATH . $name . DS;
}
} elseif (substr($baseUrl, -1) != DS) {
$baseUrl .= DS;
}
// 如果类存在 则导入类库文件
if (is_array($baseUrl)) {
foreach ($baseUrl as $path) {
$filename = $path . DS . $class . $ext;
if (is_file($filename)) {
break;
}
}
} else {
$filename = $baseUrl . $class . $ext;
}
if (!empty($filename) && is_file($filename)) {
// 开启调试模式Win环境严格区分大小写
if (IS_WIN && pathinfo($filename, PATHINFO_FILENAME) != pathinfo(realpath($filename), PATHINFO_FILENAME)) {
return false;
}
__include_file($filename);
$_file[$key] = true;
return true;
}
return false;
}
/**
* 实例化（分层）模型
* @param string $name Model名称
* @param string $layer 业务层名称
* @param bool $appendSuffix 是否添加类名后缀
* @param string $common 公共模块名
* @return Object
* @throws ClassNotFoundException
*/
public static function model($name = '', $layer = 'model', $appendSuffix = false, $common = 'common')
{
$guid = $name . $layer;
if (isset(self::$instance[$guid])) {
return self::$instance[$guid];
}
if (strpos($name, '/')) {
list($module, $name) = explode('/', $name, 2);
} else {
$module = Request::instance()->module();
}
$class = self::parseClass($module, $layer, $name, $appendSuffix);
if (class_exists($class)) {
$model = new $class();
} else {
$class = str_replace('\\' . $module . '\\', '\\' . $common . '\\', $class);
if (class_exists($class)) {
$model = new $class();
} else {
throw new ClassNotFoundException('class not exists:' . $class, $class);
}
}
self::$instance[$guid] = $model;
return $model;
}
/**
* 实例化（分层）控制器 格式：[模块名/]控制器名
* @param string $name 资源地址
* @param string $layer 控制层名称
* @param bool $appendSuffix 是否添加类名后缀
* @param string $empty 空控制器名称
* @return Object|false
* @throws ClassNotFoundException
*/
public static function controller($name, $layer = 'controller', $appendSuffix = false, $empty = '')
{
if (strpos($name, '/')) {
list($module, $name) = explode('/', $name);
} else {
$module = Request::instance()->module();
}
$class = self::parseClass($module, $layer, $name, $appendSuffix);
if (class_exists($class)) {
return App::invokeClass($class);
} elseif ($empty && class_exists($emptyClass = self::parseClass($module, $layer, $empty, $appendSuffix))) {
return new $emptyClass(Request::instance());
}
}
/**
* 实例化验证类 格式：[模块名/]验证器名
* @param string $name 资源地址
* @param string $layer 验证层名称
* @param bool $appendSuffix 是否添加类名后缀
* @param string $common 公共模块名
* @return Object|false
* @throws ClassNotFoundException
*/
public static function validate($name = '', $layer = 'validate', $appendSuffix = false, $common = 'common')
{
$name = $name ?: Config::get('default_validate');
if (empty($name)) {
return new Validate;
}
$guid = $name . $layer;
if (isset(self::$instance[$guid])) {
return self::$instance[$guid];
}
if (strpos($name, '/')) {
list($module, $name) = explode('/', $name);
} else {
$module = Request::instance()->module();
}
$class = self::parseClass($module, $layer, $name, $appendSuffix);
if (class_exists($class)) {
$validate = new $class;
} else {
$class = str_replace('\\' . $module . '\\', '\\' . $common . '\\', $class);
if (class_exists($class)) {
$validate = new $class;
} else {
throw new ClassNotFoundException('class not exists:' . $class, $class);
}
}
self::$instance[$guid] = $validate;
return $validate;
}
/**
* 数据库初始化 并取得数据库类实例
* @param mixed $config 数据库配置
* @param bool|string $name 连接标识 true 强制重新连接
* @return \think\db\Connection
*/
public static function db($config = [], $name = false)
{
return Db::connect($config, $name);
}
/**
* 远程调用模块的操作方法 参数格式 [模块/控制器/]操作
* @param string $url 调用地址
* @param string|array $vars 调用参数 支持字符串和数组
* @param string $layer 要调用的控制层名称
* @param bool $appendSuffix 是否添加类名后缀
* @return mixed
*/
public static function action($url, $vars = [], $layer = 'controller', $appendSuffix = false)
{
$info = pathinfo($url);
$action = $info['basename'];
$module = '.' != $info['dirname'] ? $info['dirname'] : Request::instance()->controller();
$class = self::controller($module, $layer, $appendSuffix);
if ($class) {
if (is_scalar($vars)) {
if (strpos($vars, '=')) {
parse_str($vars, $vars);
} else {
$vars = [$vars];
}
}
return App::invokeMethod([$class, $action . Config::get('action_suffix')], $vars);
}
}
/**
* 字符串命名风格转换
* type 0 将Java风格转换为C的风格 1 将C风格转换为Java的风格
* @param string $name 字符串
* @param integer $type 转换类型
* @return string
*/
public static function parseName($name, $type = 0)
{
if ($type) {
return ucfirst(preg_replace_callback('/_([a-zA-Z])/', function ($match) {
return strtoupper($match[1]);
}, $name));
} else {
return strtolower(trim(preg_replace("/[A-Z]/", "_\\0", $name), "_"));
}
}
/**
* 解析应用类的类名
* @param string $module 模块名
* @param string $layer 层名 controller model ...
* @param string $name 类名
* @param bool $appendSuffix
* @return string
*/
public static function parseClass($module, $layer, $name, $appendSuffix = false)
{
$name = str_replace(['/', '.'], '\\', $name);
$array = explode('\\', $name);
$class = self::parseName(array_pop($array), 1) . (App::$suffix || $appendSuffix ? ucfirst($layer) : '');
$path = $array ? implode('\\', $array) . '\\' : '';
return App::$namespace . '\\' . ($module ? $module . '\\' : '') . $layer . '\\' . $path . $class;
}
/**
* 初始化类的实例
* @return void
*/
public static function clearInstance()
{
self::$instance = [];
}
}
/**
* 作用范围隔离
*
* @param $file
* @return mixed
*/
function __include_file($file)
{
return include $file;
}
function __require_file($file)
{
return require $file;
}