3v4l.org

run code in 300+ PHP versions simultaneously
<?php class TransactionId { private $id; public function __construct($id) { $this->id = $id; } public function __troString() { return $this->id; } } echo json_encode(array('id' => new TransactionId('asdfgbhbva')));
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 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 - 8.2.19, 8.3.0 - 8.3.7
{"id":{}}
preferences:
226.27 ms | 404 KiB | 312 Q