[PHP] php提供实现反射的方法和实例代码

<?php 
 
namespace Extend;
 
 
 
use ReflectionClass;
 
use Exception;
 
 
 
/**
 
 * 用户相关类
 
 * Class User
 
 * @package Extend
 
 */
 
class User{
 
  const ROLE = 'Students';
 
  public $username = '';
 
  private $password = '';
 
 
 
  public function __construct($username, $password)
 
  {
 
  $this->username = $username;
 
  $this->password = $password;
 
  }
 
 
 
  /**
 
   * 获取用户名
 
   * @return string
 
   */
 
  public function getUsername()
 
  {
 
  return $this->username;
 
  }
 
 
 
  /**
 
   * 设置用户名
 
   * @param string $username
 
   */
 
  public function setUsername($username)
 
  {
 
  $this->username = $username;
 
  }
 
 
 
  /**
 
   * 获取密码
 
   * @return string
 
   */
 
  private function getPassword()
 
  {
 
  return $this->password;
 
  }
 
 
 
  /**
 
   * 设置密码
 
   * @param string $password
 
   */
 
  private function setPassowrd($password)
 
  {
 
  $this->password = $password;
 
  }
 
}
 
 
 
$class = new ReflectionClass('Extend\User'); // 将类名User作为参数，即可建立User类的反射类
 
$properties = $class->getProperties(); // 获取User类的所有属性，返回ReflectionProperty的数组
 
$property = $class->getProperty('password'); // 获取User类的password属性ReflectionProperty
 
$methods = $class->getMethods();  // 获取User类的所有方法，返回ReflectionMethod数组
 
$method = $class->getMethod('getUsername'); // 获取User类的getUsername方法的ReflectionMethod
 
$constants = $class->getConstants();  // 获取所有常量，返回常量定义数组
 
$constant = $class->getConstant('ROLE');  // 获取ROLE常量
 
$namespace = $class->getNamespaceName(); // 获取类的命名空间
 
$comment_class = $class->getDocComment(); // 获取User类的注释文档，即定义在类之前的注释
 
$comment_method = $class->getMethod('getUsername')->getDocComment(); // 获取User类中getUsername方法的注释文档