3v4l.org

run code in 300+ PHP versions simultaneously
<?php $links[0]="zero"; $links[1]="um"; $links[2]="dois"; $links[1] = next($links); print_r($links);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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 - 8.2.18, 8.3.0 - 8.3.7
Array ( [0] => zero [1] => um [2] => dois )
preferences:
205.81 ms | 404 KiB | 292 Q