Online PHP editor | output for Lgvq6

@ 2016-10-19T16:53:05Z

<?php

$e = new Exception();

// This line cause problem :(
// Comment it to see the difference.
// (string) $e;

// This line show the clue (PHP Warning: ...).
var_export($e);

// This line will be affected.
var_export(json_encode([$e]));

// But This line still OK.
var_export(json_encode($e));

Output for 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12: \Exception::__set_state(array( 'message' => '', 'string' => '', 'code' => 0, 'file' => '/in/Lgvq6', 'line' => 3, 'trace' => array ( ), 'previous' => NULL, ))'[{}]''{}'
Output for 5.6.0 - 5.6.27, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.1.33: Exception::__set_state(array( 'message' => '', 'string' => '', 'code' => 0, 'file' => '/in/Lgvq6', 'line' => 3, 'trace' => array ( ), 'previous' => NULL, ))'[{}]''{}'

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