这篇文章主要介绍了PHP 反射(Reflection)使用实例,本文讲解了ReflectionClass、ReflectionExtension、 ReflectionFunction、ReflectionMethod、ReflectionObject、ReflectionParameter等类的使用实例,需要的朋友可以参考下
PHP Reflection是用于获取类、扩展、方法、函数、对象、参数、属性的详细信息。
ReflectionClass类获取类相关信息,如获取属性、方法、文档注释等。
- <?php
- class Person {
- /**
- * For the sake of demonstration, we"re setting this private
- */
- private $_allowDynamicAttributes = false;
- /** type=primary_autoincrement */
- protected $id = 0;
- /** type=varchar length=255 null */
- protected $name;
- /** type=text null */
- protected $biography;
- public function getId()
- {
- return $this->id;
- }
- public function setId($v)
- {
- $this->id = $v;
- }
- public function getName()
- {
- return $this->name;
- }
- public function setName($v)
- {
- $this->name = $v;
- }
- public function getBiography()
- {
- return $this->biography;
- }
- public function setBiography($v)
- {
- $this->biography = $v;
- }
- }
- //导出类
- ReflectionClass::export('Person');
- $r = new ReflectionClass('Person');
- //获取所有属性
- print_r($r->getProperties());
- /**
- * 获取指定属性
- * ReflectionProperty::IS_STATIC
- * ReflectionProperty::IS_PUBLIC
- * ReflectionProperty::IS_PROTECTED
- * ReflectionProperty::IS_PRIVATE
- */
- print_r($r->getProperties(ReflectionProperty::IS_PRIVATE));
- //获取注释
- print_r($r->getProperty('id')->getDocComment());
- //获取方法
- print_r($r->getMethods());
ReflectionExtension 类用于获取扩展相关信息
- $re = new ReflectionExtension('Reflection');
- print_r($re->getClasses()); //扩展的所有类
- print_r($re->getClassNames()); //扩展所有类名
- $dom = new ReflectionExtension('mysql');
- print_r($dom->getConstants());//扩展常量
- print_r($dom->getDependencies());//该扩展依赖
- print_r($dom->getFunctions());//扩展方法
- print_r($dom->getINIEntries());//扩展ini信息
- print_r($dom->getName());//扩展名称
- print_r($dom->getVersion());//扩展版本
- print_r($dom->info());//扩展信息
- print_r($dom->isPersistent());//是否是持久扩展
- print_r($dom->isTemporary()); //是否是临时扩展
ReflectionFunction类 用户获取函数相关信息
- $rf = new ReflectionFunction('array_merge');
- foreach($rf->getParameters() as $item) {
- echo $item . PHP_EOL;
- }
ReflectionMethod类用户获取方法相关信息
- class Person {
- public $name;
- /**
- * get name of person
- */
- public function getName()
- {
- return $this->name;
- }
- public function setName($v)
- {
- $this->name = $v;
- }
- }
- $rm = new ReflectionMethod('Person', 'getName');
- print_r($rm->isPublic());
- print_r($rm->getDocComment());
ReflectionObject 类 用于获取对象相关信息
- class Person {
- public $name;
- public function __construct($name)
- {
- $this->name = $name;
- }
- public function getName()
- {
- return $this->name;
- }
- public function setName($v)
- {
- $this->name = $v;
- }
- }
- $a = new Person('a');
- $ro = new ReflectionObject($a);
- print_r($ro->getMethods());
ReflectionParameter 获取函数或方法参数的相关信息。
- class Person {
- public $name;
- public function __construct($name)
- {
- $this->name = $name;
- }
- public function getName()
- {
- return $this->name;
- }
- public function setName($v)
- {
- $this->name = $v;
- }
- }
- $p = new ReflectionParameter(array('Person', 'setName'), 0);
- print_r($p->getPosition()); //0
- print_r($p->getName()); //v
ReflectionProperty 获取类的属性的相关信息。
- class Person {
- /** 测试 */
- public $name;
- public function __construct($name)
- {
- $this->name = $name;
- }
- public function getName()
- {
- return $this->name;
- }
- public function setName($v)
- {
- $this->name = $v;
- }
- }
- $p = new ReflectionProperty('Person', 'name');
- print_r($p->getDocComment());
新闻热点
疑难解答