PHP中的reflection反射机制测试例子,phpreflection
PHP中的reflection反射机制测试例子,phpreflection
Java类反射应用得非常广泛几乎是所有框架的最核心部分,PHP程序员似乎从不关心反射。尝试着用java的思想去理解php的反射,跟java基本上基本一致。参考了php手册:http://www.php.net/manual/zh/book.reflection.php。
ReflectTest.php:
<?php class ReflectTest { /** * 用户ID */ private $userId; /** * 用户名 */ private $userName; /** * 用户密码 */ private $password; /** * 用户邮箱 */ private $email; /** * 用户QQ号码 */ private $qq; /** * 登陆次数 */ private $loginTimes; public function ReflectTest(){ } public function __construct($userId,$userName,$password){ $this->userId = $userId; $this->userName = $userName; $this->password = $password; } /** * * @return the $userId */ public function getUserId() { return $this->userId; } /** * * @return the $userName */ public function getUserName() { return $this->userName; } /** * * @return the $password */ public function getPassword() { return $this->password; } /** * * @return the $email */ public function getEmail() { return $this->email; } /** * * @return the $qq */ public function getQq() { return $this->qq; } /** * * @return the $loginTimes */ public function getLoginTimes() { return $this->loginTimes; } /** * * @param field_type $userId */ public function setUserId($userId) { $this->userId = $userId; } /** * * @param field_type $userName */ public function setUserName($userName) { $this->userName = $userName; } /** * * @param field_type $password */ public function setPassword($password) { $this->password = $password; } /** * * @param field_type $email */ public function setEmail($email) { $this->email = $email; } /** * * @param field_type $qq */ public function setQq($qq) { $this->qq = $qq; } /** * * @param field_type $loginTimes */ public function setLoginTimes($loginTimes) { $this->loginTimes = $loginTimes; } } ?>
Test.php:
<?php require_once 'ReflectTest.php'; $ref = new ReflectTest("1", "admin", "admin888");//实例化ReflectTest echo "<h1 id="ReflectTest-init">ReflectTest init.</h1><br/>UserId:".$ref->getUserId()."<br/>UserName:".$ref->getUserName()."<br/>Password:".$ref->getPassword(); $class = new ReflectionClass('ReflectTest');//反射加载ReflectTest类 $instance = $class->newInstanceArgs(array('123','root','123456'));//ReflectTest初始化 echo "<h1 id="Field">Field:</h1><br/>"; $field = $class->getProperties(); foreach($field as $f) { echo $f->getName()."<br/>";//反射输出所有的成员变量 } echo "<h1 id="get-Fields-DocComment">get Fields DocComment:</h1><br/>"; foreach($field as $f) { $docComment = $f->getDocComment();//反射输出所有成员变量的文档注释 echo $docComment."<br/>"; } $method = $class->getMethods();//获取ReflectTest所有方法 echo "<h1 id="get-Methods-DocComment">get Methods DocComment:</h1><br/>"; foreach($method as $m) { $docComment = $m->getDocComment();//获取所有方法的文档注释 echo $docComment."<br/>"; } echo "<h1 id="get-Methods">get Methods:</h1><br/>"; foreach($method as $m) { $k = "get";//只调ReflectTest中的所有的get方法 echo $m->getName()."=".($k === "" || strpos ( $m->getName (), $k ) === 0?$m->invoke($instance):"")."<br/>"; if("setQq"==$m->getName()){ $m->invoke($instance,'441637262');//调用setQq方法为ReflectTest当中的成员变量qq设值 } } echo "<h1 id="Invoke-set-get-Qq-result">Invoke (set/get)Qq result:</h1><br/>"; $qq=$class->getmethod('getQq');//获取getQq方法 echo "getQQ:".$qq->invoke($instance)."<br/>";//获取成员变量qq的值 echo "jb51.net"; ?>
请求http://localhost/php/test/Test.php输出结果:
ReflectTest init. UserId:1 UserName:admin Password:admin888 Field: userId userName password email qq loginTimes get Fields DocComment: /** * 用户ID */ /** * 用户名 */ /** * 用户密码 */ /** * 用户邮箱 */ /** * 用户QQ号码 */ /** * 登陆次数 */ get Methods DocComment: /** * * @return the $userId */ /** * * @return the $userName */ /** * * @return the $password */ /** * * @return the $email */ /** * * @return the $qq */ /** * * @return the $loginTimes */ /** * * @param field_type $userId */ /** * * @param field_type $userName */ /** * * @param field_type $password */ /** * * @param field_type $email */ /** * * @param field_type $qq */ /** * * @param field_type $loginTimes */ get Methods: ReflectTest= __construct= getUserId=123 getUserName=root getPassword=123456 getEmail= getQq= getLoginTimes= setUserId= setUserName= setPassword= setEmail= setQq= setLoginTimes= Invoke (set/get)Qq result: getQQ:441637262 jb51.net
又开始倒分了,有意思吗?
也可以叫映射。说直白点,他不仅能克隆到对象,而且可以调用对象的变量甚
至方法,挺强大的。php API5关于与对象有解释,有机会可以看下,类似于
java中的。当然,这种特性,足以证明php与asp还是有很大区别的!

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