3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $pok =''; if (isset($_REQUEST['co']) && (!(($pok!='') || ($pok!=' ')))){ echo '<br>neni prazdny<br>'; } else { echo '<br>je prazdny<br>'; }
based on eg3Sb
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
<br>je prazdny<br>
Output for hhvm-3.10.0

Process exited with code 153.