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ReflectionClass::isAbstract

(PHP 5, PHP 7, PHP 8)

ReflectionClass::isAbstract抽象クラスであるかどうかを調べる

説明

public ReflectionClass::isAbstract(): bool

抽象クラスであるかどうかを調べます。

パラメータ

この関数にはパラメータはありません。

戻り値

成功した場合に true を、失敗した場合に false を返します。

例1 ReflectionClass::isAbstract() の例

<?php
class TestClass { }
abstract class
TestAbstractClass { }

$testClass = new ReflectionClass('TestClass');
$abstractClass = new ReflectionClass('TestAbstractClass');

var_dump($testClass->isAbstract());
var_dump($abstractClass->isAbstract());
?>

上の例の出力は以下となります。

bool(false)
bool(true)

参考

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User Contributed Notes 2 notes

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3
baptiste at pillot dot fr
7 years ago
For interfaces and traits :

<?php
interface TestInterface { }
trait
TestTrait { }

$interfaceClass = new ReflectionClass('TestInterface');
$traitClass = new ReflectionClass('TestTrait');

var_dump($interfaceClass->isAbstract());
var_dump($traitClass->isAbstract());
?>

Using PHP versions 5.4- to 5.6, the above example will output:

bool(false)
bool(true)

Using PHP versions 7.0+, the above example will output:

bool(false)
bool(false)
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0
baptiste at pillot dot fr
9 months ago
For traits:
- ReflectionClass::isAbstract returns true if the trait contains at least one un-implemented abstract method, including those declared into used traits.
- ReflectionClass::isAbstract returns false if all methods are implemented.

<?php
trait TI { public function has() {} }
var_dump((new ReflectionClass(TI::class))->isAbstract());

trait
TT { abstract public function has(); }
trait
T { use TT; }
var_dump((new ReflectionClass(T::class))->isAbstract());
?>
Will output:
bool(false)
bool(true)

For interfaces:
- ReflectionClass::isAbstract returns true if the interface contains at least one method, including into its extended interfaces.
- ReflectionClass::isAbstract returns false if the interface contains no method.

<?php
interface AI {}
var_dump((new ReflectionClass(AI::class))->isAbstract());

interface
II { public function has(); }
interface
I extends II {}
var_dump((new ReflectionClass(I::class))->isAbstract());
?>
Will output:
bool(false)
bool(true)

For classes:
- Reflection::isAbstract returns true if the class is marked as abstract, no matter if it contains abstract methods or not.
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