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<?php |
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declare (strict_types=1); |
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use Psr\Container\ContainerInterface; |
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/** |
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* 容器管理类 支持PSR-11 |
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* 代码参考ThinkPHP6的Container.php |
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* Class Container |
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*/ |
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class Container implements ContainerInterface |
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{ |
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/** |
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* 容器对象实例 |
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* @var Container|Closure |
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*/ |
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protected static $instance; |
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/** |
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* 容器中的对象实例 |
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* @var array |
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*/ |
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protected $instances = []; |
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/** |
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* 容器绑定标识 |
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* @var array |
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*/ |
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protected $bind = []; |
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/** |
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* 容器回调 |
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* @var array |
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*/ |
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protected $invokeCallback = []; |
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/** |
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* 获取当前容器的实例(单例) |
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* @access public |
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* @return static |
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*/ |
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public static function getInstance() |
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{ |
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if (is_null(static::$instance)) { |
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static::$instance = new static; |
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} |
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if (static::$instance instanceof Closure) { |
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return (static::$instance)(); |
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} |
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return static::$instance; |
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} |
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/** |
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* 获取容器中的对象实例 |
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* @access public |
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* @param string $abstract 类名或者标识 |
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* @return object |
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* @throws ReflectionException |
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* @throws Exception |
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*/ |
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public function get($abstract) |
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{ |
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if ($this->has($abstract)) { |
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return $this->make($abstract); |
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} |
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throw new Exception('class not exists: ' . $abstract, $abstract); |
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} |
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/** |
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* 根据别名获取真实类名 |
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* @param string $abstract |
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* @return string |
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*/ |
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public function getAlias(string $abstract): string |
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{ |
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if (isset($this->bind[$abstract])) { |
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$bind = $this->bind[$abstract]; |
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if (is_string($bind)) { |
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return $this->getAlias($bind); |
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} |
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} |
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return $abstract; |
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} |
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/** |
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* 判断容器中是否存在类及标识 |
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* @access public |
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* @param string $abstract 类名或者标识 |
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* @return bool |
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*/ |
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public function bound(string $abstract): bool |
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{ |
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return isset($this->bind[$abstract]) || isset($this->instances[$abstract]); |
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} |
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/** |
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* 判断容器中是否存在类及标识 |
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* @access public |
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* @param string $name 类名或者标识 |
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* @return bool |
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*/ |
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public function has($name): bool |
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{ |
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return $this->bound($name); |
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} |
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/** |
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* 创建类的实例 已经存在则直接获取 |
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* @access public |
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* @param string $abstract 类名或者标识 |
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* @param array $vars 变量 |
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* @param bool $newInstance 是否每次创建新的实例 |
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* @return mixed |
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* @throws ReflectionException |
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*/ |
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public function make(string $abstract, array $vars = [], bool $newInstance = false) |
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{ |
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$abstract = $this->getAlias($abstract); |
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if (isset($this->instances[$abstract]) && !$newInstance) { |
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return $this->instances[$abstract]; |
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} |
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if (isset($this->bind[$abstract]) && $this->bind[$abstract] instanceof Closure) { |
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$object = $this->invokeFunction($this->bind[$abstract], $vars); |
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} else { |
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$object = $this->invokeClass($abstract, $vars); |
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} |
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if (!$newInstance) { |
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$this->instances[$abstract] = $object; |
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} |
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return $object; |
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} |
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/** |
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* 执行函数或者闭包方法 支持参数调用 |
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* @access public |
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* @param string|Closure $function 函数或者闭包 |
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* @param array $vars 参数 |
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* @return mixed |
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* @throws ReflectionException |
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* @throws Exception |
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*/ |
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public function invokeFunction($function, array $vars = []) |
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{ |
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try { |
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$reflect = new ReflectionFunction($function); |
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} catch (ReflectionException $e) { |
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throw new Exception("function not exists: {$function}()", $function, $e); |
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} |
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$args = $this->bindParams($reflect, $vars); |
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return $function(...$args); |
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} |
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/** |
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* 调用反射执行类的实例化 支持依赖注入 |
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* @access public |
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* @param string $class 类名 |
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* @param array $vars 参数 |
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* @return mixed |
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* @throws ReflectionException |
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* @throws Exception |
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*/ |
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public function invokeClass(string $class, array $vars = []) |
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{ |
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try { |
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$reflect = new ReflectionClass($class); |
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} catch (ReflectionException $e) { |
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throw new Exception('class not exists: ' . $class, $class, $e); |
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} |
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if ($reflect->hasMethod('__make')) { |
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$method = $reflect->getMethod('__make'); |
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if ($method->isPublic() && $method->isStatic()) { |
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$args = $this->bindParams($method, $vars); |
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$object = $method->invokeArgs(null, $args); |
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$this->invokeAfter($class, $object); |
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return $object; |
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} |
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} |
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$constructor = $reflect->getConstructor(); |
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$args = $constructor ? $this->bindParams($constructor, $vars) : []; |
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$object = $reflect->newInstanceArgs($args); |
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$this->invokeAfter($class, $object); |
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return $object; |
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} |
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/** |
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* 执行invokeClass回调 |
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* @access protected |
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* @param string $class 对象类名 |
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* @param object $object 容器对象实例 |
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* @return void |
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*/ |
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protected function invokeAfter(string $class, $object): void |
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{ |
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if (isset($this->invokeCallback['*'])) { |
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foreach ($this->invokeCallback['*'] as $callback) { |
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$callback($object, $this); |
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} |
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} |
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if (isset($this->invokeCallback[$class])) { |
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foreach ($this->invokeCallback[$class] as $callback) { |
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$callback($object, $this); |
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} |
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} |
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} |
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/** |
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* 绑定参数 |
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* @access protected |
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* @param ReflectionFunctionAbstract $reflect 反射类 |
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* @param array $vars 参数 |
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* @return array |
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* @throws ReflectionException |
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*/ |
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protected function bindParams(ReflectionFunctionAbstract $reflect, array $vars = []): array |
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{ |
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if ($reflect->getNumberOfParameters() == 0) { |
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return []; |
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} |
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// 判断数组类型 数字数组时按顺序绑定参数 |
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reset($vars); |
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$type = key($vars) === 0 ? 1 : 0; |
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$params = $reflect->getParameters(); |
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$args = []; |
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foreach ($params as $param) { |
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$name = $param->getName(); |
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$lowerName = self::snake($name); |
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$reflectionType = $param->getType(); |
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if ($reflectionType && $reflectionType->isBuiltin() === false) { |
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$args[] = $this->getObjectParam($reflectionType->getName(), $vars); |
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} elseif (1 == $type && !empty($vars)) { |
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$args[] = array_shift($vars); |
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} elseif (0 == $type && array_key_exists($name, $vars)) { |
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$args[] = $vars[$name]; |
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} elseif (0 == $type && array_key_exists($lowerName, $vars)) { |
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$args[] = $vars[$lowerName]; |
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} elseif ($param->isDefaultValueAvailable()) { |
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$args[] = $param->getDefaultValue(); |
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} else { |
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throw new InvalidArgumentException('method param miss:' . $name); |
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} |
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} |
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return $args; |
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} |
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protected static $snakeCache = []; |
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/** |
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* 驼峰转下划线 |
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* |
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* @param string $value |
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* @param string $delimiter |
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* @return string |
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*/ |
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private static function snake(string $value, string $delimiter = '_'): string |
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{ |
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$key = $value; |
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if (isset(static::$snakeCache[$key][$delimiter])) { |
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return static::$snakeCache[$key][$delimiter]; |
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} |
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if (!ctype_lower($value)) { |
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$value = preg_replace('/\s+/u', '', $value); |
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$value = static::lower(preg_replace('/(.)(?=[A-Z])/u', '$1' . $delimiter, $value)); |
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} |
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return static::$snakeCache[$key][$delimiter] = $value; |
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} |
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/** |
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* 字符串转小写 |
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* |
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* @param string $value |
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* @return string |
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*/ |
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private static function lower(string $value): string |
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{ |
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return mb_strtolower($value, 'UTF-8'); |
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} |
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/** |
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* 获取对象类型的参数值 |
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* @access protected |
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* @param string $className 类名 |
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* @param array $vars 参数 |
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* @return mixed |
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* @throws ReflectionException |
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*/ |
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protected function getObjectParam(string $className, array &$vars) |
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{ |
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$array = $vars; |
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$value = array_shift($array); |
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if ($value instanceof $className) { |
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$result = $value; |
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array_shift($vars); |
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} else { |
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$result = $this->make($className); |
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} |
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return $result; |
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} |
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public function __get($name) |
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{ |
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return $this->get($name); |
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} |
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public function offsetGet($key) |
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{ |
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return $this->make($key); |
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} |
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} |
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