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<ReflectionClass::isIterateableReflectionClass::isSubclassOf>
^ReflectionClassLast updated: Mon, 26 Oct 2026

ReflectionClass::isReadOnly

(PHP 8 >= 8.2.0)

ReflectionClass::isReadOnly — Checks if class is readonly

Description

public function ReflectionClass::isReadOnly(): bool

Checks if a class is readonly.

Parameters

This function has no parameters.

Return Values

true if a class is readonly, false otherwise.

Examples

Example #1 ReflectionClass::isReadOnly() example

<?php
class TestClass { }
readonly class TestReadOnlyClass { }

$normalClass = new ReflectionClass('TestClass');
$readonlyClass = new ReflectionClass('TestReadOnlyClass');

var_dump($normalClass->isReadOnly());
var_dump($readonlyClass->isReadOnly());

?>

The above example will output:

bool(false)
bool(true)

See Also


<ReflectionClass::isIterateableReflectionClass::isSubclassOf>
^ReflectionClassLast updated: Mon, 26 Oct 2026