PHP 7.1.0 Release Candidate 3 Released

ReflectionClass::isInstance

(PHP 5)

ReflectionClass::isInstanceChecks class for instance

Descrizione

public bool ReflectionClass::isInstance ( object $object )

Checks if an object is an instance of a class.

Elenco dei parametri

object

The object being compared to.

Valori restituiti

Restituisce TRUE in caso di successo, FALSE in caso di fallimento.

Esempi

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";
}
?>

Il precedente esempio visualizzerĂ  qualcosa simile a:

Yes
Yes
Yes

Vedere anche:

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User Contributed Notes 1 note

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dhairya lakhera
7 months 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));
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