ReflectionClass::isInstance

(PHP 5, PHP 7, PHP 8)

ReflectionClass::isInstance — Checks class for instance

Description

public 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 on success or false on failure.

Examples

Example #1 ReflectionClass::isInstance() related examples

<?php
// Example usage
$class = new ReflectionClass('Foo');

if ($class->isInstance($arg)) {
    echo "Yes";
}

// Equivalent to
if ($arg instanceof Foo) {
    echo "Yes";
}

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

The above example will output something similar to:

Yes
Yes
Yes

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User Contributed Notes 1 note

down

dhairya lakhera ¶

8 years ago

class  TestClass { }

$TestObj=new TestClass();

$TestObj_assigned=$TestObj;
$TestObj_Refrenced=&$TestObj;
$TestObj_cloned=clone $TestObj;

$obj=new ReflectionClass('TestClass');

var_dump($obj->isInstance($TestObj)); 
var_dump($obj->isInstance($TestObj_assigned)); 
var_dump($obj->isInstance($TestObj_Refrenced)); 
var_dump($obj->isInstance($TestObj_cloned));