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ReflectionClass::isFinal	ReflectionClass::isInstantiable

ReflectionClass	Last updated: Mon, 26 Oct 2026

ReflectionClass::isInstance

(PHP 5, PHP 7, PHP 8)

ReflectionClass::isInstance — Checks class for instance

Description

public function ReflectionClass::isInstance(object $object): bool

Checks if an object is an instance of a class.

Parameters

object: The object being compared to.

Return Values

Returns true if the object is an instance of the class, or false otherwise.

Examples

Example #1 ReflectionClass::isInstance() related examples

<?php

class Foo {}

$object = new Foo();

$reflection = new ReflectionClass('Foo');

if ($reflection->isInstance($object)) {
    echo "Yes\n";
}

// Equivalent to
if ($object instanceof Foo) {
    echo "Yes\n";
}

// Equivalent to
if (is_a($object, 'Foo')) {
    echo "Yes";
}
?>

The above example will output something similar to:

Yes
Yes
Yes

See Also

ReflectionClass::isInterface() - Checks if the class is an interface
Type operators (instanceof)
Object Interfaces
is_a() - Checks whether the object is of a given type or subtype

ReflectionClass::isFinal	ReflectionClass::isInstantiable

ReflectionClass	Last updated: Mon, 26 Oct 2026