PHP 5 features a complete reflection API, adding the ability to reverse engineer classes, interfaces, functions, methods, and extensions. Additionally, the Reflection API provides methods to extract documentation comments from functions, classes, and methods.
ReflectionClass::__construct — Construct a ReflectionClass class
public ReflectionClass::__construct ( mixed $argument )
ReflectionClass::newInstanceArgs — Creates a new class instance from the given arguments, which are passed to the class's constructor.
public object ReflectionClass::newInstanceArgs ([ array $args ] )
/thinkphp/library/think/Container.php
/**
* 调用反射执行类的实例化 支持依赖注入
* @access public
* @param string $class 类名
* @param array $vars 参数
* @return mixed
*/
public function invokeClass($class, $vars = [])
{
try { $reflect = new ReflectionClass($class); $constructor = $reflect->getConstructor(); //用于支持依赖的注入
$args = $constructor ? $this->bindParams($constructor, $vars) : []; return $reflect->newInstanceArgs($args);
} catch (ReflectionException $e) { throw new ClassNotFoundException('class not exists: ' . $class, $class);
}
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