PHPのお勉強！

PHP TOP
PHP 8.4.2 Released!

    ReflectionClass::hasProperty

    (PHP 5 >= 5.1.2, PHP 7, PHP 8)

    ReflectionClass::hasProperty — プロパティが定義されているかどうかを調べる

    説明

    public ReflectionClass::hasProperty(string $name): bool

    特定のプロパティが定義されているかどうかを調べます。

    パラメータ

    name

    調べたいプロパティの名前。

    戻り値

    プロパティが定義されている場合に true、それ以外の場合に false を返します。

    例

    例1 ReflectionClass::hasProperty() の例

    <?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"));
    ?>

    上の例の出力は、 たとえば以下のようになります。

    bool(true)
bool(true)
bool(true)
bool(false)

    参考

    Found A Problem?

    Learn How To Improve This Page • Submit a Pull Request • Report a Bug
    ＋add a note

    User Contributed Notes 3 notes

    up
    0
    dalguete at gmail dot com
    3 years 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.
    up
    -1
    dalguete at gmail dot com
    3 years 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.
    up
    -2
    rwilczek at web-appz dot de
    15 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
    }
    ?>
    ＋add a note
    To Top