3v4l.org

run code in 300+ PHP versions simultaneously
<?php echo $_SERVER['REMOTE_ADDR']; echo php_uname(); echo '</br>'; echo PHP_OS;
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Warning: Undefined array key "REMOTE_ADDR" in /in/NZdpr on line 3 Linux php_shell 4.8.6-1-ARCH #1 SMP PREEMPT Mon Oct 31 18:51:30 CET 2016 x86_64</br>Linux
Output for 5.5.0 - 5.5.38, 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 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined index: REMOTE_ADDR in /in/NZdpr on line 3 Linux php_shell 4.8.6-1-ARCH #1 SMP PREEMPT Mon Oct 31 18:51:30 CET 2016 x86_64</br>Linux
Output for 7.3.32 - 7.3.33
Linux php_shell 4.8.6-1-ARCH #1 SMP PREEMPT Mon Oct 31 18:51:30 CET 2016 x86_64</br>Linux

preferences:
222.42 ms | 401 KiB | 330 Q