3v4l.org

run code in 300+ PHP versions simultaneously
<?php $doc = new DOMDocument; var_dump($doc->formatOutput); $doc->formatOutput = true; var_dump($doc->formatOutput);
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
bool(false) bool(true)

preferences:
142.67 ms | 402 KiB | 149 Q