3v4l.org

run code in 500+ PHP versions simultaneously
<?php $xml = new SimpleXMLElement('<root><elem>Text</elem></root>'); echo 'elem2 is: ' . ($xml->elem2 ?? 'backup string'); echo 'elem2 is: ' . (isset($xml->elem2) ? $xml->elem2 : 'backup string');
Output for 5.6.0 - 5.6.25
Parse error: syntax error, unexpected '?' in /in/DF8AE on line 5
Process exited with code 255.
Output for 7.0.0 - 7.0.10
elem2 is: elem2 is: backup string
Output for 7.0.20 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
elem2 is: backup stringelem2 is: backup string

preferences:
39.44 ms | 1144 KiB | 11 Q