ReflectionClass::hasProperty
(PHP 5 >= 5.1.2, PHP 7, PHP 8)
ReflectionClass::hasProperty — 检查属性是否已定义
说明
public ReflectionClass::hasProperty(string
$name): bool检查指定的属性是否已定义。
参数
-
name -
待检查的属性的名称。
返回值
如果有这个属性返回 true，否则返回 false。
范例
示例 #1 ReflectionClass::hasProperty() 例子
<?php
class Foo {
public $p1;
protected $p2;
private $p3;
}
$obj = new ReflectionObject(new Foo());
var_dump($obj->hasProperty("p1"));
var_dump($obj->hasProperty("p2"));
var_dump($obj->hasProperty("p3"));
var_dump($obj->hasProperty("p4"));
?>
以上例程的输出类似于：
bool(true) bool(true) bool(true) bool(false)
add a note
User Contributed Notes 3 notes
dalguete at gmail dot com ¶
1 year ago
hasProperty() now is consistent with getProperty() and getProperties() methods, thanks to this fix https://bugs.php.net/bug.php?id=49719
hasProperty() no longer returns true in private properties from parent classes.
rwilczek at web-appz dot de ¶
12 years ago
Note, that this method does not guarantee, that you can get a property with ReflectionClass::getProperty().
ReflectionClass::hasProperty() considers the parent classes (ignoring however, that a private property is not inherited), while ReflectionClass::getProperty() and ReflectionClass::getProperties() don't care about inheritance.
(Tested with PHP 5.3.0)
<?php
class Foo
{
private $x;
}
class Bar extends Foo
{
//
}
$foo = new ReflectionClass('Foo');
$bar = new ReflectionClass('Bar');
var_dump($foo->hasProperty('x'); // bool(true)
var_dump($bar->hasProperty('x'); // bool(true)
var_dump(get_class($foo->getProperty('x'))); //string(18) "ReflectionProperty"
try {
$bar->getProperty('x');
} catch (ReflectionException $e) {
echo $e->getMessage(); // Property x does not exist
}
?>
dalguete at gmail dot com ¶
1 year ago
hasProperty() now is consistent with getProperty() and getProperties() methods, thanks to this fix https://bugs.php.net/bug.php?id=49719
hasProperty() no longer returns true in private properties.
备份地址：http://www.lvesu.com/blog/php/reflectionclass.hasproperty.php