Online PHP editor | refs for 4scuq

<?php function setPrevious(Throwable $e, Throwable $previous): Throwable { return (function () use ($e, $previous) { $e->previous = $previous; return $e; })->call($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());