Online PHP editor | output for 19qOJ

@ 2016-01-26T17:09:44Z

<?php

abstract class ParentClass {
    const TEST_CONSTANT = null;

    public function __construct()
    {
        if (!defined('static::TEST_CONSTANT') || empty(static::TEST_CONSTANT)) {
            throw new Exception("Please define TEST_CONSTANT!");
        }
    }

    abstract protected function someFunction();
}

class ChildClass extends ParentClass {

    protected function someFunction()
    {
        //some functionality here
    }
}

$x = new ChildClass();

Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Fatal error: Uncaught Exception: Please define TEST_CONSTANT! in /in/19qOJ:9 Stack trace: #0 /in/19qOJ(24): ParentClass->__construct() #1 {main} thrown in /in/19qOJ on line 9
Process exited with code 255.
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.28: Fatal error: Uncaught exception 'Exception' with message 'Please define TEST_CONSTANT!' in /in/19qOJ:9 Stack trace: #0 /in/19qOJ(24): ParentClass->__construct() #1 {main} thrown in /in/19qOJ on line 9
Process exited with code 255.

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