3v4l.org

run code in 300+ PHP versions simultaneously
<?php $ltActive = 1; $rtActive = NULL; if($ltActive && $rtActive){ $class = 'class when both sidebars are active'; }elseif(!$ltActive && !$rtActive){ $class = 'class when both sidebars are inactive'; }else{ $class = 'class when only one of the sidebars is active (either one)'; // <== } print $class;
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.38, 7.0.0 - 7.0.33, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
class when only one of the sidebars is active (either one)

preferences:
261.57 ms | 406 KiB | 424 Q