418 lines
13 KiB
PHP
418 lines
13 KiB
PHP
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace think;
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use think\exception\ClassNotFoundException;
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class Loader
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{
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/**
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* 类名映射信息
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* @var array
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*/
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protected static $classMap = [];
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/**
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* 类库别名
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* @var array
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*/
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protected static $classAlias = [];
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/**
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* PSR-4
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* @var array
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*/
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private static $prefixLengthsPsr4 = [];
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private static $prefixDirsPsr4 = [];
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private static $fallbackDirsPsr4 = [];
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/**
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* PSR-0
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* @var array
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*/
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private static $prefixesPsr0 = [];
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private static $fallbackDirsPsr0 = [];
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/**
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* 需要加载的文件
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* @var array
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*/
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private static $files = [];
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/**
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* Composer安装路径
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* @var string
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*/
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private static $composerPath;
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// 获取应用根目录
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public static function getRootPath()
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{
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if ('cli' == PHP_SAPI) {
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$scriptName = realpath($_SERVER['argv'][0]);
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} else {
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$scriptName = $_SERVER['SCRIPT_FILENAME'];
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}
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$path = realpath(dirname($scriptName));
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if (!is_file($path . DIRECTORY_SEPARATOR . 'think')) {
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$path = dirname($path);
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}
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return $path . DIRECTORY_SEPARATOR;
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}
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// 注册自动加载机制
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public static function register($autoload = '')
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{
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// 注册系统自动加载
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spl_autoload_register($autoload ?: 'think\\Loader::autoload', true, true);
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$rootPath = self::getRootPath();
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self::$composerPath = $rootPath . 'vendor' . DIRECTORY_SEPARATOR . 'composer' . DIRECTORY_SEPARATOR;
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// Composer自动加载支持
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if (is_dir(self::$composerPath)) {
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if (is_file(self::$composerPath . 'autoload_static.php')) {
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require self::$composerPath . 'autoload_static.php';
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$declaredClass = get_declared_classes();
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$composerClass = array_pop($declaredClass);
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foreach (['prefixLengthsPsr4', 'prefixDirsPsr4', 'fallbackDirsPsr4', 'prefixesPsr0', 'fallbackDirsPsr0', 'classMap', 'files'] as $attr) {
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if (property_exists($composerClass, $attr)) {
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self::${$attr} = $composerClass::${$attr};
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}
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}
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} else {
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self::registerComposerLoader(self::$composerPath);
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}
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}
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// 注册命名空间定义
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self::addNamespace([
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'think' => __DIR__,
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'traits' => dirname(__DIR__) . DIRECTORY_SEPARATOR . 'traits',
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]);
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// 加载类库映射文件
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if (is_file($rootPath . 'runtime' . DIRECTORY_SEPARATOR . 'classmap.php')) {
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self::addClassMap(__include_file($rootPath . 'runtime' . DIRECTORY_SEPARATOR . 'classmap.php'));
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}
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// 自动加载extend目录
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self::addAutoLoadDir($rootPath . 'extend');
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}
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// 自动加载
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public static function autoload($class)
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{
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if (isset(self::$classAlias[$class])) {
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return class_alias(self::$classAlias[$class], $class);
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}
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if ($file = self::findFile($class)) {
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// Win环境严格区分大小写
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if (strpos(PHP_OS, 'WIN') !== false && pathinfo($file, PATHINFO_FILENAME) != pathinfo(realpath($file), PATHINFO_FILENAME)) {
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return false;
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}
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__include_file($file);
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return true;
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}
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}
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/**
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* 查找文件
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* @access private
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* @param string $class
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* @return string|false
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*/
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private static function findFile($class)
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{
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if (!empty(self::$classMap[$class])) {
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// 类库映射
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return self::$classMap[$class];
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}
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// 查找 PSR-4
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$logicalPathPsr4 = strtr($class, '\\', DIRECTORY_SEPARATOR) . '.php';
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$first = $class[0];
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if (isset(self::$prefixLengthsPsr4[$first])) {
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foreach (self::$prefixLengthsPsr4[$first] as $prefix => $length) {
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if (0 === strpos($class, $prefix)) {
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foreach (self::$prefixDirsPsr4[$prefix] as $dir) {
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if (is_file($file = $dir . DIRECTORY_SEPARATOR . substr($logicalPathPsr4, $length))) {
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return $file;
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}
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}
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}
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}
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}
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// 查找 PSR-4 fallback dirs
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foreach (self::$fallbackDirsPsr4 as $dir) {
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if (is_file($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr4)) {
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return $file;
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}
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}
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// 查找 PSR-0
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if (false !== $pos = strrpos($class, '\\')) {
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// namespaced class name
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$logicalPathPsr0 = substr($logicalPathPsr4, 0, $pos + 1)
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. strtr(substr($logicalPathPsr4, $pos + 1), '_', DIRECTORY_SEPARATOR);
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} else {
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// PEAR-like class name
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$logicalPathPsr0 = strtr($class, '_', DIRECTORY_SEPARATOR) . '.php';
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}
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if (isset(self::$prefixesPsr0[$first])) {
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foreach (self::$prefixesPsr0[$first] as $prefix => $dirs) {
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if (0 === strpos($class, $prefix)) {
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foreach ($dirs as $dir) {
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if (is_file($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
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return $file;
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}
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}
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}
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}
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}
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// 查找 PSR-0 fallback dirs
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foreach (self::$fallbackDirsPsr0 as $dir) {
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if (is_file($file = $dir . DIRECTORY_SEPARATOR . $logicalPathPsr0)) {
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return $file;
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}
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}
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return self::$classMap[$class] = false;
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}
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// 注册classmap
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public static function addClassMap($class, $map = '')
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{
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if (is_array($class)) {
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self::$classMap = array_merge(self::$classMap, $class);
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} else {
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self::$classMap[$class] = $map;
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}
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}
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// 注册命名空间
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public static function addNamespace($namespace, $path = '')
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{
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if (is_array($namespace)) {
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foreach ($namespace as $prefix => $paths) {
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self::addPsr4($prefix . '\\', rtrim($paths, DIRECTORY_SEPARATOR), true);
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}
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} else {
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self::addPsr4($namespace . '\\', rtrim($path, DIRECTORY_SEPARATOR), true);
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}
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}
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// 添加Ps0空间
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private static function addPsr0($prefix, $paths, $prepend = false)
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{
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if (!$prefix) {
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if ($prepend) {
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self::$fallbackDirsPsr0 = array_merge(
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(array) $paths,
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self::$fallbackDirsPsr0
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);
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} else {
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self::$fallbackDirsPsr0 = array_merge(
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self::$fallbackDirsPsr0,
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(array) $paths
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);
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}
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return;
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}
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$first = $prefix[0];
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if (!isset(self::$prefixesPsr0[$first][$prefix])) {
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self::$prefixesPsr0[$first][$prefix] = (array) $paths;
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return;
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}
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if ($prepend) {
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self::$prefixesPsr0[$first][$prefix] = array_merge(
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(array) $paths,
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self::$prefixesPsr0[$first][$prefix]
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);
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} else {
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self::$prefixesPsr0[$first][$prefix] = array_merge(
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self::$prefixesPsr0[$first][$prefix],
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(array) $paths
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);
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}
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}
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// 添加Psr4空间
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private static function addPsr4($prefix, $paths, $prepend = false)
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{
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if (!$prefix) {
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// Register directories for the root namespace.
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if ($prepend) {
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self::$fallbackDirsPsr4 = array_merge(
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(array) $paths,
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self::$fallbackDirsPsr4
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);
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} else {
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self::$fallbackDirsPsr4 = array_merge(
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self::$fallbackDirsPsr4,
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(array) $paths
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);
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}
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} elseif (!isset(self::$prefixDirsPsr4[$prefix])) {
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// Register directories for a new namespace.
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$length = strlen($prefix);
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if ('\\' !== $prefix[$length - 1]) {
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throw new \InvalidArgumentException("A non-empty PSR-4 prefix must end with a namespace separator.");
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}
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self::$prefixLengthsPsr4[$prefix[0]][$prefix] = $length;
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self::$prefixDirsPsr4[$prefix] = (array) $paths;
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} elseif ($prepend) {
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// Prepend directories for an already registered namespace.
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self::$prefixDirsPsr4[$prefix] = array_merge(
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(array) $paths,
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self::$prefixDirsPsr4[$prefix]
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);
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} else {
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// Append directories for an already registered namespace.
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self::$prefixDirsPsr4[$prefix] = array_merge(
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self::$prefixDirsPsr4[$prefix],
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(array) $paths
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);
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}
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}
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// 注册自动加载类库目录
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public static function addAutoLoadDir($path)
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{
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self::$fallbackDirsPsr4[] = $path;
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}
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// 注册类别名
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public static function addClassAlias($alias, $class = null)
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{
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if (is_array($alias)) {
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self::$classAlias = array_merge(self::$classAlias, $alias);
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} else {
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self::$classAlias[$alias] = $class;
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}
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}
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// 注册composer自动加载
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public static function registerComposerLoader($composerPath)
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{
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if (is_file($composerPath . 'autoload_namespaces.php')) {
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$map = require $composerPath . 'autoload_namespaces.php';
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foreach ($map as $namespace => $path) {
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self::addPsr0($namespace, $path);
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}
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}
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if (is_file($composerPath . 'autoload_psr4.php')) {
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$map = require $composerPath . 'autoload_psr4.php';
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foreach ($map as $namespace => $path) {
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self::addPsr4($namespace, $path);
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}
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}
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if (is_file($composerPath . 'autoload_classmap.php')) {
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$classMap = require $composerPath . 'autoload_classmap.php';
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if ($classMap) {
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self::addClassMap($classMap);
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}
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}
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if (is_file($composerPath . 'autoload_files.php')) {
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self::$files = require $composerPath . 'autoload_files.php';
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}
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}
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// 加载composer autofile文件
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public static function loadComposerAutoloadFiles()
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{
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foreach (self::$files as $fileIdentifier => $file) {
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if (empty($GLOBALS['__composer_autoload_files'][$fileIdentifier])) {
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__require_file($file);
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$GLOBALS['__composer_autoload_files'][$fileIdentifier] = true;
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}
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}
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}
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/**
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* 字符串命名风格转换
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* 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
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* @access public
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* @param string $name 字符串
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* @param integer $type 转换类型
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* @param bool $ucfirst 首字母是否大写（驼峰规则）
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* @return string
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*/
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public static function parseName($name, $type = 0, $ucfirst = true)
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{
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if ($type) {
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$name = preg_replace_callback('/_([a-zA-Z])/', function ($match) {
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return strtoupper($match[1]);
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}, $name);
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return $ucfirst ? ucfirst($name) : lcfirst($name);
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}
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return strtolower(trim(preg_replace("/[A-Z]/", "_\\0", $name), "_"));
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}
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/**
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* 创建工厂对象实例
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* @access public
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* @param string $name 工厂类名
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* @param string $namespace 默认命名空间
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* @return mixed
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*/
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public static function factory($name, $namespace = '', ...$args)
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{
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$class = false !== strpos($name, '\\') ? $name : $namespace . ucwords($name);
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if (class_exists($class)) {
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return Container::getInstance()->invokeClass($class, $args);
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} else {
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throw new ClassNotFoundException('class not exists:' . $class, $class);
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}
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}
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}
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/**
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* 作用范围隔离
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*
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* @param $file
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* @return mixed
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*/
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function __include_file($file)
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{
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return include $file;
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}
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function __require_file($file)
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{
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return require $file;
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}
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