Online PHP editor | output for 0ct5l

@ 2019-12-05T16:10:56Z

<?php

function setPrevious(Throwable $e, Throwable $previous): Throwable
{
    $reflection = new ReflectionClass($e);
    $prop = $reflection->getProperty('previous');
    $prop->setAccessible(true);
    $prop->setValue($e, $previous);
    return $e;
}

class SimpleException extends Exception
{
    public function __construct($message)
    {
        parent::__construct($message);
    }
}

$a = new SimpleException('A');
$b = new SimpleException('B');
$c = new SimpleException('C');

setPrevious($a, $b);
setPrevious($a, $c);

$e = $a;
do {
    var_dump($e->getMessage());
} while ($e = $e->getPrevious());

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12: Fatal error: Uncaught ReflectionException: Property SimpleException::$previous does not exist in /in/0ct5l:6 Stack trace: #0 /in/0ct5l(6): ReflectionClass->getProperty('previous') #1 /in/0ct5l(24): setPrevious(Object(SimpleException), Object(SimpleException)) #2 {main} thrown in /in/0ct5l on line 6
Process exited with code 255.
Output for 7.1.26 - 7.1.33, 7.2.17 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33: Fatal error: Uncaught ReflectionException: Property previous does not exist in /in/0ct5l:6 Stack trace: #0 /in/0ct5l(6): ReflectionClass->getProperty('previous') #1 /in/0ct5l(24): setPrevious(Object(SimpleException), Object(SimpleException)) #2 {main} thrown in /in/0ct5l on line 6
Process exited with code 255.

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