Explanation of the PHP reflection mechanism

PHP 5 has a complete reflection API that adds the ability to reverse engineer classes, interfaces, functions, methods, and extensions. In addition, the reflection API provides a way to remove document comments from functions, classes, and methods.

Use of reflection in the TP frame:

• reflectionclass::__construct-constructs a Reflectionclass class

Public reflectionclass::__construct (mixed $argument)

• Reflectionclass::newinstanceargs-creates a new class instance from the parameters given, which is passed to the constructor of the class.

public object Reflectionclass::newinstanceargs ([array $args])

• /thinkphp/library/think/container.php

/** * Invoke reflection Execution Class instantiation support Dependency Injection * @access public * @param string $class class name        * @param array $vars parameter * @return Mixed */Public function Invokeclass ($class, $vars = []) {            try {$reflect = new Reflectionclass ($class);            $constructor = $reflect->getconstructor (); Injection $args = $constructor used to support dependencies?            $this->bindparams ($constructor, $vars): [];        Return $reflect->newinstanceargs ($args);        } catch (Reflectionexception $e) {throw new ClassNotFoundException (' Class NOT exists: '. $class, $class); }    }