ReflectionProperty::__construct
(PHP 5, PHP 7)
ReflectionProperty :: __构造 - 构造一个ReflectionProperty对象
描述
public ReflectionProperty::__construct ( mixed $class , string $name )警告
此功能目前没有记录; 只有它的参数列表可用。
参数
class
包含该属性的类名称。
name
所反映的财产的名称。
返回值
没有值返回。
错误/异常
尝试获取或设置私有或受保护的类属性的值将导致引发异常。
例子
Example＃1 ReflectionProperty :: __ construct()示例
<?php
class Str
{
public $length = 5;
}
// Create an instance of the ReflectionProperty class
$prop = new ReflectionProperty('Str', 'length');
// Print out basic information
printf(
"===> The%s%s%s%s property '%s' (which was %s)\n" .
" having the modifiers %s\n",
$prop->isPublic() ? ' public' : '',
$prop->isPrivate() ? ' private' : '',
$prop->isProtected() ? ' protected' : '',
$prop->isStatic() ? ' static' : '',
$prop->getName(),
$prop->isDefault() ? 'declared at compile-time' : 'created at run-time',
var_export(Reflection::getModifierNames($prop->getModifiers()), 1)
);
// Create an instance of Str
$obj= new Str();
// Get current value
printf("---> Value is: ");
var_dump($prop->getValue($obj));
// Change value
$prop->setValue($obj, 10);
printf("---> Setting value to 10, new value is: ");
var_dump($prop->getValue($obj));
// Dump object
var_dump($obj);
?>上面的例子会输出类似于：
===> The public property 'length' (which was declared at compile-time)
having the modifiers array (
0 => 'public',
)
---> Value is: int(5)
---> Setting value to 10, new value is: int(10)
object(Str)#2 (1) {
["length"]=>
int(10)
}示例＃2使用 ReflectionProperty类从私有和受保护属性获取值
<?php
class Foo {
public $x = 1;
protected $y = 2;
private $z = 3;
}
$obj = new Foo;
$prop = new ReflectionProperty('Foo', 'y');
$prop->setAccessible(true); /* As of PHP 5.3.0 */
var_dump($prop->getValue($obj)); // int(2)
$prop = new ReflectionProperty('Foo', 'z');
$prop->setAccessible(true); /* As of PHP 5.3.0 */
var_dump($prop->getValue($obj)); // int(2)
?>上面的例子会输出类似于：
int(2)
int(3)← ReflectionProperty::__clone
ReflectionProperty::export →
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