PHP 反射(Reflection)使用实例

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());