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());
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());