Demonstrates a PHP bug: The "final" keyword for a method is ignored if used in a trait (https://bugs.php.net/bug.php?id=62204)

FinalKeywordIgnoredInTrait.php

<?php
/**
 * FinalKeywordIgnoredInTrait.php
 *
 * PHP 5.4.13 (cli) (built: Mar 15 2013 02:05:59)
 * Copyright (c) 1997-2013 The PHP Group
 * Zend Engine v2.4.0, Copyright (c) 1998-2013 Zend Technologies
 * with Xdebug v2.2.1, Copyright (c) 2002-2012, by Derick Rethans
 *
 * @link https://bugs.php.net/bug.php?id=62204
 */

trait ExampleTrait
{
    final function execute()
    {
    }
}

class Example
{
    use ExampleTrait;

    // Should raise an \E_FATAL with the following message:
    // "Cannot override final method Example::execute() in [...] on line 26"
    function execute()
    {
    }
}

trait isn't abide by class inherit constraint?
PHP should raise an \E_FATAL when the parent class defined a final method.

my english is not good ==！

Example

class ParentExample
{
    final function execute()
    {
        echo 'from parent';
    }

}

trait ExampleTrait
{
    function execute()
    {
    }
}

class Example extends ParentExample
{
    use ExampleTrait;
}