3v4l.org

run code in 300+ PHP versions simultaneously
<?php if(isset($xxx)) { echo "isset<br>"; echo var_dump($xxx); } else { echo "notset<br>"; echo var_dump($xxx); } ?>
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
notset<br> Warning: Undefined variable $xxx in /in/MT1l3 on line 8 NULL
Output for 5.0.4 - 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, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
notset<br> Notice: Undefined variable: xxx in /in/MT1l3 on line 8 NULL
Output for 7.3.32 - 7.3.33
notset<br>NULL
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.3
notset<br> Notice: Undefined variable: xxx in /in/MT1l3 on line 8 NULL

preferences:
253.78 ms | 402 KiB | 325 Q